Acoustic adjustment method and acoustic adjustment device

Abstract

To accurately realize the acoustic characteristics desired by a user.SOLUTION: An acoustic adjustment method associates N acoustic characteristics with N specific points Ps (N is a natural number equal to or greater than 3) in an operation area ARop used for adjusting the acoustic characteristics, accepts an operation to designate an arbitrary position in the operation area ARop as a selection point Pu (operation to designate a selection point Pu), identifies the acoustic characteristic corresponding to the selection point Pu as a selected characteristic on the basis of at least one specific point Ps of the N specific points Ps, the acoustic characteristic corresponding to the at least one specific point Ps, and the selection point Pu, and determines whether to confirm the selected characteristic as a target acoustic characteristic to be set by adjusting the acoustic characteristics. When the selected characteristic is not confirmed as the target acoustic characteristic, an update process is executed on the basis of the selected characteristic and the N acoustic characteristics to update at least one of the N acoustic characteristics to an acoustic characteristic other than the N acoustic characteristics, and accepts the operation (operation to designate the selection point Pu) again.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to an acoustic adjustment method and an acoustic adjustment device.

Background Art

[0002] An acoustic adjustment device such as an equalizer that imparts an acoustic effect is known. This type of acoustic adjustment device realizes acoustic characteristics desired by a user, for example, by the user adjusting the value of a parameter related to acoustic characteristics such as sound quality (hereinafter also referred to as an acoustic parameter). For example, Patent Document 1 discloses a method of displaying a one-dimensional psychological category axis by a sound quality expression word pair expressed in emotional words and realizing the sound quality desired by a listener (user) by designating a scale value on the psychological category axis with a cursor key or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the conventional method of designating the value of an acoustic parameter by selecting a value on an axis, the acoustic parameter associated with the axis is predetermined. For this reason, for example, when the number of axes displayed on an operation screen or the like is small, the number of acoustic parameters to be adjusted is smaller than when the number of axes is large, so there are cases where the acoustic characteristics desired by the user cannot be realized. Further, for example, when the number of axes displayed on an operation screen or the like is large, the number of acoustic parameters to be adjusted increases compared to when the number of axes is small, so the operation for realizing the acoustic characteristics desired by the user may become troublesome. In this case, the operation may be interrupted before the acoustic characteristics desired by the user are realized, and there is a risk that the acoustic characteristics desired by the user cannot be realized.

[0005] In view of the above circumstances, one aspect of the present disclosure aims to accurately achieve the desired acoustic characteristics of a user.

Means for Solving the Problems

[0006] In an acoustic adjustment method according to one aspect of the present disclosure, N acoustic characteristics are respectively associated with N specific points (N is a natural number of 3 or more) within an operation region used for adjusting acoustic characteristics, an operation of designating an arbitrary position within the operation region as a selection point is received, based on at least one of the N acoustic characteristics, at least one of the N specific points, and the selection point, the acoustic characteristic corresponding to the selection point is specified as a selection characteristic, it is determined whether to determine the selection characteristic as a target acoustic characteristic set by adjusting the acoustic characteristics, when the selection characteristic is not determined as the target acoustic characteristic, an update process of updating at least one of the N acoustic characteristics to another acoustic characteristic other than the N acoustic characteristics is executed based on the selection characteristic and the N acoustic characteristics, and the operation is received again.

[0007] An acoustic adjustment device according to one aspect of the present disclosure includes a correspondence setting unit that respectively associates N acoustic characteristics with N specific points (N is a natural number of 3 or more) within an operation region used for adjusting acoustic characteristics, an operation reception unit that receives an operation of designating an arbitrary position within the operation region as a selection point, a specifying unit that specifies the acoustic characteristic corresponding to the selection point as a selection characteristic based on at least one of the N acoustic characteristics, at least one of the N specific points, and the selection point, and a determination unit that determines whether to determine the selection characteristic as a target acoustic characteristic set by adjusting the acoustic characteristics, and when the selection characteristic is not determined as the target acoustic characteristic, the correspondence setting unit executes an update process of updating at least one of the N acoustic characteristics to another acoustic characteristic other than the N acoustic characteristics based on the selection characteristic and the N acoustic characteristics, and the operation reception unit receives the operation again.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the dimensions and scales of each part in the drawings are appropriately different from the actual ones. In addition, the embodiments described below are preferred specific examples of the present disclosure. For this reason, various technically preferable limitations are imposed on this embodiment. However, the scope of the present disclosure is not limited to these embodiments unless there is a description to particularly limit the present disclosure in the following description.

[0010] FIG. 1 is an explanatory diagram for explaining the acoustic adjustment device 100 according to the embodiment.

[0011] In the present embodiment, it is assumed that the acoustic system 10 has an acoustic adjustment device 100 for adjusting acoustic characteristics. Note that, as the acoustic characteristics, for example, sound quality and delay in a surround system correspond. Further, as the sound quality, for example, frequency characteristics and the like correspond. In addition, the acoustic system 10 is an arbitrary system having a signal processing function and a sound emitting function. For example, various systems such as various audio devices, karaoke devices, car stereos, PA devices, and electronic musical instruments correspond to the acoustic system 10. In the present embodiment, it is assumed that the acoustic system 10 is an in-vehicle audio device.

[0012] The audio system 10 includes, for example, an audio adjustment device 100, an input / output device 200, a signal processing device 300, and a sound emitting device 400. First, before explaining the audio adjustment device 100, the input / output device 200, the signal processing device 300, and the sound emitting device 400 will be briefly explained.

[0013] The input / output device 200 is, for example, hardware (such as a touch panel) in which an output device that functions as a display unit for displaying various information and an input device that functions as an operation unit for receiving operations by the user form a pair.

[0014] For example, the input / output device 200 displays various information under the control of the audio adjustment device 100 (more specifically, the display control unit 112 described later). Specifically, the input / output device 200 displays an operation screen SCop based on the image information Iinf output from the audio adjustment device 100. The operation screen SCop includes an operation image or the like indicating an operation area ARop used for adjusting the acoustic characteristics. That is, the operation area ARop is displayed on the operation screen SCop. The details of the operation screen SCop will be described later with reference to FIG. 2. The input / output device 200 is an example of a "display device".

[0015] As shown in FIG. 1, in the present embodiment, it is assumed that the operation area ARop is a quadrilateral having four specific points Ps (Ps1, Ps2, Ps3, and Ps4) as vertices. The specific points Ps are positions within the operation area ARop to which specific acoustic characteristics are associated by the correspondence setting unit 114 described later. The number of the specific points Ps is not limited to four. For example, the number of the specific points Ps may be three, or may be five or more.

[0016] Also, for example, the input / output device 200 receives an operation by the user and outputs operation information Pinf indicating the content of the received operation to the audio adjustment device 100. For example, when the operation by the user is an operation of designating an arbitrary position within the operation area ARop as a selection point Pu, the input / output device 200 outputs operation information Pinf indicating the selection point Pu designated by the user to the audio adjustment device 100.

[0017] The operation information Pinf may indicate the position of the selection point Pu, for example, using the coordinates indicating the position on the display screen of the input / output device 200 or within the operation screen SCop. Alternatively, the operation information Pinf may indicate the position of the selection point Pu in the operation area ARop. The position of the selection point Pu in the operation area ARop is indicated, for example, using one or two of the four axes Ax1, Ax2, Ax3, and Ax4 that respectively extend from the reference point Pr in the operation area ARop to the four specific points Ps1, Ps2, Ps3, and Ps4. Here, in the present embodiment, it is assumed that the reference point Pr is the central position of the four specific points Ps1, Ps2, Ps3, and Ps4. However, the reference point Pr is not limited to the central position of the four specific points Ps1, Ps2, Ps3, and Ps4 as long as it is a position within the operation area ARop. Also, the axis Ax and the reference point Pr may not be displayed on the operation screen SCop.

[0018] In the present embodiment, it is assumed that the output device and the input device are paired. However, the output device (e.g., a display device) and the input device (e.g., an operating device) may be separate.

[0019] The signal processing device 300 generates an audio signal Sout by performing signal processing on the audio signal Sin indicating sound. For example, the audio signal Sin is input from an external audio playback device (not shown). In the present embodiment, it is assumed that the signal processing performed on the audio signal Sin is an equalizer process that adjusts the signal level of the audio signal Sin for each frequency band of the audio signal Sin. However, the signal processing performed on the audio signal Sin is not limited to the equalizer process. The signal processing device 300 executes an equalizer process on the audio signal Sin, for example, based on the adjustment information ADinf output from the acoustic adjustment device 100. Thereby, an audio signal Sout based on the adjustment information ADinf is generated. Then, the sound emitting device 400 emits the sound indicated by the audio signal Sout output from the signal processing device 300. That is, the sound having the acoustic characteristics adjusted by the adjustment information ADinf is emitted from the sound emitting device 400. The sound emitting device 400 is, for example, a speaker.

[0020] Here, the adjustment information ADinf is information for realizing the acoustic characteristics desired by the user, and indicates the values of parameters (acoustic parameters) related to the acoustic characteristics. Note that the acoustic parameters are, for example, parameters for imparting an acoustic effect to the sound indicated by the sound signal Sin. For example, the gain (amplification factor) for each frequency band of the sound signal Sin is set by the acoustic parameters. In the present embodiment, the adjustment information ADinf indicates the gain for each frequency band of the sound signal Sin. Next, the acoustic adjustment device 100 that generates the adjustment information ADinf will be described.

[0021] The acoustic adjustment device 100 is an information processing device for adjusting the values of the acoustic parameters. Also, as the acoustic adjustment device 100, any information processing device can be adopted. For example, the acoustic adjustment device 100 includes a processing device 110 that controls each part of the acoustic adjustment device 100, and a storage device 140 that stores various information.

[0022] The storage device 140 includes, for example, one or both of a volatile memory such as a RAM (Random Access Memory) that functions as a work area of the processing device 110, and a non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory) that stores various information such as the control program PG. Note that the storage device 140 may be detachable from the acoustic adjustment device 100. Specifically, the storage device 140 may be a storage medium such as a memory card that is detachable from the acoustic adjustment device 100.

[0023] The processing device 110 is a processor that controls the entire acoustic adjustment device 100, and is configured to include, for example, one or more CPUs (Central Processing Units). For example, the processing device 110 functions as a display control unit 112, an operation reception unit 113, a correspondence setting unit 114, a specifying unit 116, and a determination unit 118 by executing a control program PG stored in the storage device 140. As a result, the acoustic adjustment device 100 functions as, for example, a device that determines acoustic parameters (a device for adjusting acoustic characteristics) for realizing acoustic characteristics desired by a user. Note that the control program PG may be transmitted from another device via a network.

[0024] Also, for example, when the processing device 110 is configured to include a plurality of CPUs, some or all of the functions of the processing device 110 may be realized by these plurality of CPUs operating in cooperation according to a program such as the control program PG. Further, the processing device 110 may include, in addition to one or more CPUs, or instead of some or all of the one or more CPUs, hardware such as a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), or an FPGA (Field Programmable Gate Array). In this case, some or all of the functions of the processing device 110 may be realized by hardware such as a DSP.

[0025] The display control unit 112 causes, for example, an operation screen SCop used for adjusting acoustic characteristics to be displayed on the input / output device 200. For example, the display control unit 112 generates image information Iinf indicating the operation screen SCop, and outputs the generated image information Iinf to the input / output device 200. As a result, the operation screen SCop indicated by the image information Iinf is displayed on the display screen of the input / output device 200.

[0026] The operation reception unit 113 receives an operation of designating an arbitrary position within the operation area ARop displayed on the operation screen SCop as a selection point Pu. Specifically, for example, the operation reception unit 113 receives the operation information Pinf output from the input / output device 200 to the acoustic adjustment device 100 as information indicating the selection point Pu within the operation area ARop designated by the user's operation. Hereinafter, the operation of designating an arbitrary position within the operation area ARop as the selection point Pu may be referred to as the designation operation of the selection point Pu. The designation operation of the selection point Pu may be, for example, an operation of moving a mark MK (e.g., a pointer, etc.) indicating the selection point Pu displayed on the operation screen SCop while touching it with a finger or the like and then releasing the finger or the like from the operation screen SCop (more specifically, the mark MK) at an arbitrary position within the operation area ARop. The designation operation of the selection point Pu may be an operation of moving the mark MK indicating the selection point Pu by a mouse or the like and then determining it as the selection point Pu at an arbitrary position within the operation area ARop.

[0027] The correspondence setting unit 114 associates N acoustic characteristics (where N is a natural number of 3 or more) with N specific points Ps within the operation area ARop. In the present embodiment, as described above, since the case where the number of specific points Ps is 4 (that is, the case where N is 4) is assumed, the correspondence setting unit 114 associates 4 acoustic characteristics with 4 specific points Ps1, Ps2, Ps3, and Ps4 within the operation area ARop, respectively. Each of the 4 acoustic characteristics associated with the 4 specific points Ps is indicated by, for example, a parameter set including a plurality of acoustic parameters. That is, in the present embodiment, one acoustic characteristic is indicated by one parameter set including a plurality of acoustic parameters. For example, in two parameter sets respectively indicating two different acoustic characteristics, the value of at least one acoustic parameter among the plurality of acoustic parameters included in each parameter set is different between the two parameter sets. In the present embodiment, as described above, the value of each acoustic parameter indicates the gain of each frequency band of the sound signal Sin.

[0028] The specific part 116 specifies, based on at least one of the four specific points Ps, the acoustic characteristics associated with the at least one specific point Ps, and the selection point Pu, the acoustic characteristics corresponding to the selection point Pu as the selection characteristics.

[0029] Here, the acoustic characteristics corresponding to the reference point Pr may be the average of the four acoustic characteristics associated with the four specific points Ps. Alternatively, the reference acoustic characteristics may be associated with the reference point Pr. The reference acoustic characteristics may be, for example, flat frequency characteristics where the gain of each frequency band of the sound signal Sin is 0 dB. Alternatively, when an update process for updating at least one of the four acoustic characteristics associated with the four specific points Ps is executed, the reference acoustic characteristics may be the selection characteristics (acoustic characteristics corresponding to the selection point Pu) described later. The update process will be described later with reference to FIG. 3.

[0030] Also, the acoustic characteristics (values of each acoustic parameter) corresponding to any position other than the four specific points Ps and the reference point Pr within the operation region ARop are specified, for example, by linearly interpolating two or three of the five acoustic characteristics corresponding to the four specific points Ps and the reference point Pr. Specifically, for example, the acoustic characteristics corresponding to an arbitrary position on the axis Ax1 are specified by linearly interpolating the acoustic characteristics corresponding to the reference point Pr and the specific point Ps1. Also, for example, the acoustic characteristics corresponding to an arbitrary position between two axes Ax are specified by linearly interpolating the three acoustic characteristics corresponding to the two specific points Ps that define the two axes Ax and the reference point Pr.

[0031] Therefore, for example, the specific part 116 specifies the acoustic characteristics corresponding to the selection point Pu by linearly interpolating the three acoustic characteristics corresponding to the two specific points Ps (in the example shown in FIG. 1, the specific points Ps3 and Ps4) among the four specific points Ps that are close to the selection point Pu, and the reference point Pr. In this way, the specific part 116 specifies the acoustic characteristics corresponding to the selection point Pu as the selection characteristics based on the two specific points Ps among the four specific points Ps that are close to the selection point Pu and the three acoustic characteristics corresponding to the reference point Pr. Note that the method for specifying the acoustic characteristics (selection characteristics) corresponding to the selection point Pu is not limited to the method using linear interpolation, and other methods such as spline interpolation may be used.

[0032] The determination unit 118 determines whether to determine the selection characteristics (acoustic characteristics corresponding to the selection point Pu) specified by the specific part 116 as the target acoustic characteristics set by adjusting the acoustic characteristics. The target acoustic characteristics are, for example, the acoustic characteristics desired by the user. That is, the determination unit 118 determines whether to determine the selection characteristics specified by the specific part 116 as the acoustic characteristics desired by the user. In this way, the selection characteristics correspond to candidates for the target acoustic characteristics (acoustic characteristics desired by the user).

[0033] Note that when the selection characteristics are not determined as the target acoustic characteristics, the corresponding setting unit 114 executes an update process of updating at least one of the four acoustic characteristics associated with the four specific points Ps to other acoustic characteristics other than the four acoustic characteristics based on the selection characteristics and the four acoustic characteristics. Then, the operation reception unit 113 receives the designation operation of the selection point Pu again.

[0034] As described above, in this embodiment, the update process for the four acoustic characteristics associated with the four specific points Ps and the designation operation for the selection point Pu are repeated until the selection characteristic is determined as the target acoustic characteristic. In this embodiment, since the selection point Pu is designated from the operation area ARop associated with the four acoustic characteristics, compared with a configuration (hereinafter also referred to as a proportional comparison) in which the selection point Pu is designated from a slider or the like associated with two acoustic characteristics, the target acoustic characteristic can be specified more efficiently. For example, in this embodiment, it is possible to suppress an increase in the number of executions of the designation operation for the selection point Pu that is repeated until the target acoustic characteristic is determined, compared with the proportional comparison. Therefore, the user can easily realize the desired acoustic characteristics only by executing the designation operation for the selection point Pu several times.

[0035] Note that the configurations of the acoustic system 10 and the acoustic adjustment device 100 are not limited to the example shown in FIG. 1. For example, the operation area ARop may not be displayed on the input / output device 200. In this case, for example, the entire display screen of the input / output device 200 may be treated as the operation area ARop. Also, for example, the operation area ARop may not be displayed as a graphic. For example, among the operation screen SCop (or the display screen of the input / output device 200), the positions corresponding to the N specific points Ps may be lit. Also, for example, the acoustic adjustment device 100 may include one or both of the signal processing device 300 and the input / output device 200. Further, the acoustic adjustment device 100 may include one or both of the display device and the operation device.

[0036] Next, an example of the operation screen SCop will be described with reference to FIGS. 2 and 3.

[0037] FIG. 2 is an explanatory diagram for explaining an example of the operation screen SCop. The upper operation screen SCop in FIG. 2 shows the initial state of the operation screen SCop used for adjusting the acoustic characteristics, and the lower operation screen SCop in FIG. 2 shows the state of the operation screen SCop when the first designation operation for the selection point Pu is performed (before specifying the first selection point Pu).

[0038] On the operation screen SCop, for example, in addition to the operation area ARop, four labels LA (LA1, LA2, LA3, and LA4) each indicating four acoustic characteristic features are displayed in association with four specific points Ps (Ps1, Ps2, Ps3, and Ps4). The label LA may be something such that the acoustic characteristics can be grasped by looking at the label (for example, a sensory word, a figure, a color, etc.). Note that the label LA may be updated in accordance with the update of the acoustic characteristics corresponding to the specific point Ps. Also, in the example shown in FIG. 1, on the operation screen SCop, a plurality of buttons BT (BT1, BT2, BT3, and BT4) for the GUI (Graphical User Interface), information Ninf indicating the number of execution times of the update process, and an image IMGs for checking the acoustic characteristics are displayed. Touching the button BT corresponds to pressing down the button BT.

[0039] In the example shown in FIG. 2, as shown in the image IMGs, five acoustic parameters for setting the gains of five frequency bands of band B1, band B2, band B3, band B4, and band B5 are included in the parameter set of each acoustic characteristic.

[0040] As shown on the upper operation screen SCop in FIG. 2, in the example shown in FIG. 2, the initial acoustic characteristics corresponding to the reference point Pr are flat frequency characteristics where the gains of each frequency band of band B1, band B2, band B3, band B4, and band B5 are 0 dB.

[0041] Also, in the initial state when adjusting the acoustic characteristics, for example, four prepared acoustic characteristics are associated with four specific points Ps. For example, four representative acoustic characteristics set by the manufacturer are prepared in advance as the four acoustic characteristics associated with the four specific points Ps in the initial state. For example, the characteristic indicated by label LA1 (the "type A" in the figure) represents the characteristic of the initial acoustic characteristic associated with specific point Ps1, and the characteristic indicated by label LA2 (the "type B" in the figure) represents the characteristic of the initial acoustic characteristic associated with specific point Ps2. Also, for example, the characteristic indicated by label LA3 (the "type C" in the figure) represents the characteristic of the initial acoustic characteristic associated with specific point Ps3, and the characteristic indicated by label LA4 (the "type D" in the figure) represents the characteristic of the initial acoustic characteristic associated with specific point Ps4.

[0042] Also, in the initial state when adjusting the acoustic characteristics, the mark MK indicating the selection point Pu is located at the reference point Pr. For example, the user executes an operation of moving the mark MK while touching it with a finger and then releasing the finger from the operation screen SCop (more specifically, the mark MK) at an arbitrary position within the operation area ARop as an operation for designating the selection point Pu. The dotted arrow shown in the lower operation screen SCop of FIG. 2 shows an example of the trajectory of the mark MK moved by the operation for designating the selection point Pu.

[0043] Here, for example, when button BT1 is pressed (when button BT is touched), a sound with acoustic characteristics corresponding to the position of mark MK is emitted from sound emission device 400. Also, when button BT2 is pressed, the emission of sound from sound emission device 400 stops. Note that sound emission may continue without stopping the sound. Buttons BT1 and BT2 may be, for example, buttons BT for controlling the playback and stop of an external acoustic playback device, or buttons BT for controlling the on and off of the output to sound emission device 400. Note that a GUI (for example, buttons BT1 and BT2) for controlling the playback and the like of an external acoustic playback device may not be displayed on operation screen SCop, that is, the external acoustic playback device may not be controlled, and a mode may be adopted in which only the input acoustic signal (for example, sound signal Sin) is processed. Also, when button BT3 is pressed, the position of mark MK at the time when button BT3 is pressed is specified as selection point Pu, and an update process is executed to update at least one of the four acoustic characteristics associated with the four specific points Ps to an acoustic characteristic other than the four acoustic characteristics. Note that when button BT3 is pressed in a state where the number of update processes has reached the upper limit (four times in the example shown in FIG. 2), the acoustic characteristic (selected characteristic) corresponding to the position of mark MK (selection point Pu) at the time when button BT3 is pressed may be determined as the target acoustic characteristic. Also, when button BT4 is pressed, the acoustic characteristic (selected characteristic) corresponding to the position of mark MK (selection point Pu) at the time when button BT4 is pressed is determined as the target acoustic characteristic.

[0044] For example, after the user presses button BT1, the user can specify selection point Pu while listening to the sound of the acoustic characteristics corresponding to the position of moving mark MK by performing a specifying operation on selection point Pu. Thereby, the user can search for acoustic characteristics that suit their preferences within operation area ARop. In FIG. 2, it is assumed that button BT3 is pressed in the state of operation screen SCop at the lower part of FIG. 2. Therefore, in FIG. 2, the gains of five frequency bands of band B1, band B2, band B3, band B4, and band B5, which are 2.0 [dB], -0.2 [dB], -7.3 [dB], -3.6 [dB], and 0.0 [dB], respectively, are specified as the first selection characteristics. Note that the m-th (m is a natural number of 1 or more) selection characteristics are the acoustic characteristics corresponding to selection point Pu specified by the specifying operation of the m-th selection point Pu.

[0045] Next, after the first selection characteristics are specified, that is, an example of operation screen SCop after the first update process is executed will be described with reference to FIG. 3.

[0046] FIG. 3 is an explanatory diagram for explaining an example of operation screen SCop after the first update process is executed. The upper operation screen SCop in FIG. 3 shows the state of operation screen SCop after the first update process is executed, and the lower operation screen SCop in FIG. 3 shows the state of operation screen SCop when the specifying operation of the second selection point Pu is being performed (before the second selection point Pu is specified).

[0047] The first update process is executed based on, for example, the acoustic characteristics (first selection characteristics) corresponding to the selection point Pu specified by the designation operation of the first selection point Pu, the initial four acoustic characteristics associated with the four specific points Ps, and the initial acoustic characteristics corresponding to the reference point Pr. For example, the characteristics indicated by the label LA1 (the "type E" in the figure) indicate the characteristics of the acoustic characteristics associated with the specific point Ps1 by the first update process. Also, the characteristics indicated by the label LA2 (the "type F" in the figure) indicate the characteristics of the acoustic characteristics associated with the specific point Ps2 by the first update process. Also, the characteristics indicated by the label LA3 (the "type G" in the figure) indicate the characteristics of the acoustic characteristics associated with the specific point Ps3 by the first update process. Also, the characteristics indicated by the label LA4 (the "type H" in the figure) indicate the characteristics of the acoustic characteristics associated with the specific point Ps4 by the first update process.

[0048] For example, the update process of the acoustic characteristics associated with each specific point Ps may be executed using Bayesian optimization as a method for estimating a point where the probability of obtaining the optimal solution is high. When Bayesian optimization is used, for example, the acoustic characteristics associated with each specific point Ps are updated in consideration of both the acoustic characteristics where the probability of obtaining the target acoustic characteristics is likely and the unexplored acoustic characteristics. The acoustic characteristics where the probability of obtaining the target acoustic characteristics is likely are specified based on, for example, the preferred parameter set (the acoustic characteristics corresponding to the selection point Pu) and the five parameter sets that were not preferred (the five acoustic characteristics corresponding to the four specific points Ps and one reference point Pr).

[0049] In addition, when the distance between the selection point Pu and any one of the four specific points Ps and one reference point Pr is equal to or less than the threshold value, the parameter set of the acoustic characteristics corresponding to the point where the distance from the selection point Pu among the four specific points Ps and one reference point Pr is equal to or less than the threshold value may be excluded from the parameter sets that were not preferred.

[0050] Also, the preferred parameter set and the five non-preferred parameter sets may be stored in the storage device 140, for example, each time a designation operation of the selection point Pu is executed (each time a selection characteristic is specified). In this case, the preferred parameter set and the non-preferred parameter sets are accumulated each time the designation operation of the selection point Pu is executed. Then, based on the parameter sets accumulated as the preferred parameter set and the non-preferred parameter sets, acoustic characteristics with a high probability of obtaining the target acoustic characteristics may be specified. That is, when the update process is executed two or more times, in the update process after the second time, the selection characteristics and the four acoustic characteristics referred to in the past update process may also be referred to.

[0051] When the first update process is executed, as shown in the upper operation screen SCop of FIG. 3, the initial position of the mark MK indicating the selection point Pu is, for example, the reference point Pr. In addition, to the reference point Pr after the first update process, for example, the acoustic characteristics (first selection characteristics) corresponding to the selection point Pu designated by the first designation operation of the selection point Pu are associated.

[0052] The user can, for example, in the same manner as the first designation operation of the selection point Pu, after pressing the button BT1, execute the designation operation of the selection point Pu to specify the selection point Pu while listening to the sound of the acoustic characteristics corresponding to the position of the moving mark MK. The dotted arrow shown in the lower operation screen SCop of FIG. 3 shows an example of the trajectory of the mark MK moved by the designation operation of the selection point Pu.

[0053] When the button BT3 is pressed in the state of the lower operation screen SCop of FIG. 3, the second update process is executed. Also, when the button BT4 is pressed in the state of the lower operation screen SCop of FIG. 3, the acoustic characteristics (selection characteristics) corresponding to the position of the mark MK (selection point Pu) at the time when the button BT4 is pressed are determined as the target acoustic characteristics.

[0054] As described above, in this embodiment, the update process of the acoustic characteristics associated with each specific point Ps is executed based on the preferred acoustic characteristics (selected characteristics) selected by the user through the designation operation of the selection point Pu. Therefore, in this embodiment, a new operation area ARop based on the preferred acoustic characteristics selected by the user can be proposed to the user. Thus, in this embodiment, by repeating the designation operation and the update process of the selection point Pu, the target acoustic characteristics can be easily realized. Note that in the examples shown in FIGS. 2 and 3, the upper limit of the number of executions of the update process is set in advance, but the upper limit of the number of executions of the update process may not be set.

[0055] Next, an example of the operation of the acoustic adjustment device 100 will be described with reference to FIG. 4.

[0056] FIG. 4 is a flowchart showing an example of the operation of the acoustic adjustment device 100. The process of step S100 is executed, for example, after an operation for starting the adjustment of the acoustic characteristics is performed.

[0057] First, in step S100, the processing device 110 functions as the correspondence setting unit 114 and associates four acoustic characteristics with four specific points Ps in the operation area ARop, respectively.

[0058] Next, in step S110, the processing device 110 functions as the display control unit 112 and causes the input / output device 200 to display the operation screen SCop. For example, the display control unit 112 causes the input / output device 200 to display the operation screen SCop by outputting image information Iinf indicating the operation screen SCop to the input / output device 200.

[0059] Next, in step S120, the processing device 110 functions as the operation reception unit 113 and specifies the position of the mark MK indicating the selection point Pu within the operation area ARop. For example, the operation reception unit 113 acquires operation information Pinf indicating the position of the mark MK from the input / output device 200, and specifies the position of the mark MK based on the operation information Pinf. In this way, in step S120, the operation reception unit 113 receives an operation for designating an arbitrary position within the operation area ARop as the selection point Pu.

[0060] Next, in step S140, the processing device 110 functions as the specifying unit 116 and specifies the acoustic characteristics corresponding to the position of the mark MK. For example, the specifying unit 116 specifies the value of each of the plurality of acoustic parameters included in the parameter set of the acoustic characteristics corresponding to the position of the mark MK by linearly interpolating two or three of the five acoustic characteristics corresponding to the four specifying points Ps and the reference point Pr.

[0061] Next, in step S160, the processing device 110 functions as the specifying unit 116 and outputs adjustment information ADinf indicating the acoustic characteristics (the values of each acoustic parameter) corresponding to the position of the mark MK to the signal processing device 300. Thereby, an audio signal Sout based on the adjustment information ADinf is generated by the signal processing device 300, and the sound indicated by the audio signal Sout is radiated from the sound radiating device 400. That is, the sound with the acoustic characteristics corresponding to the position of the mark MK is radiated from the sound radiating device 400.

[0062] Next, in step S180, the processing device 110 functions as the operation reception unit 113 and determines whether or not to specify the position of the mark MK as the selection point Pu. For example, when the button BT3 or BT4 is pressed, the operation reception unit 113 determines that the position of the mark MK is specified as the selection point Pu.

[0063] If the result of the determination in step S180 is affirmative, the operation reception unit 113 specifies the position of the mark MK as the selection point Pu and transfers the process to step S200. For example, when the button BT3 or BT4 is pressed, the operation reception unit 113 specifies the position of the mark MK at the time when the button BT (BT3 or BT4) is pressed as the selection point Pu and transfers the process to step S200. In this case, the acoustic characteristic corresponding to the position of the mark MK at the time when the button BT3 or BT4 is pressed is the acoustic characteristic (selection characteristic) corresponding to the selection point Pu.

[0064] On the other hand, if the result of the determination in step S180 is negative, the operation reception unit 113 returns the process to step S120.

[0065] In step S200, the processing device 110 functions as a determination unit 118 and determines whether to determine the acoustic characteristic (selection characteristic) corresponding to the selection point Pu as the target acoustic characteristic. For example, when the button BT4 is pressed, the determination unit 118 determines that the selection characteristic is determined as the target acoustic characteristic. Alternatively, when the button BT3 is pressed in a state where the number of update processes has reached the upper limit, the determination unit 118 determines that the selection characteristic is determined as the target acoustic characteristic. Note that when the button BT3 is pressed in a state where the number of update processes has not reached the upper limit, the determination unit 118 determines that the selection characteristic is not determined as the target acoustic characteristic.

[0066] If the result of the determination in step S200 is affirmative, the determination unit 118 determines the selection characteristic as the target acoustic characteristic and transfers the process to step S300. For example, when the button BT4 is pressed, the determination unit 118 determines the acoustic characteristic (selection characteristic) corresponding to the position of the mark MK (that is, the selection point Pu) at the time when the button BT4 is pressed as the target acoustic characteristic and transfers the process to step S300.

[0067] On the other hand, if the result of the determination in step S200 is negative, the determination unit 118 identifies the selection characteristic and transfers the process to step S220. For example, when the button BT3 is pressed while the number of update processes has not reached the upper limit, the determination unit 118 identifies the acoustic characteristic corresponding to the position of the mark MK (i.e., the selection point Pu) at the time when the button BT3 is pressed as the selection characteristic, and transfers the process to step S220.

[0068] In step S220, the processing device 110 functions as the correspondence setting unit 114 and updates the four acoustic characteristics corresponding to the four specific points Ps in the operation area ARop. For example, as described with reference to FIG. 3, the correspondence setting unit 114 executes an update process for updating the four acoustic characteristics corresponding to the four specific points Ps in the operation area ARop using Bayesian optimization. Although not shown in FIG. 4, in step S220, the correspondence setting unit 114 associates the acoustic characteristic (selection characteristic) corresponding to the selection point Pu with the reference point Pr. After executing the process of step S220, the correspondence setting unit 114 transfers the process to step S240.

[0069] In step S240, the processing device 110 functions as the display control unit 112 and updates the operation screen SCop. For example, the display control unit 112 outputs image information Iinf indicating the updated operation screen SCop to the input / output device 200. After executing the process of step S240, the display control unit 112 returns the process to step S120. In this way, when the selection characteristic is not determined as the target acoustic characteristic, the update process is executed and the designation operation of the selection point Pu is received again. When the selection characteristic is determined as the target acoustic characteristic, as described above, the process of step S300 is executed.

[0070] In step S300, the processing device 110 functions as, for example, the specifying unit 116 and outputs adjustment information ADinf indicating the target acoustic characteristic (values of each acoustic parameter) to the signal processing device 300. Note that the process of step S300 may be executed by a functional block other than the specifying unit 116 (for example, the determination unit 118).

[0071] As described above, in this embodiment, when the selection characteristic is not determined as the target acoustic characteristic, the update process is executed based on the selection characteristic and the like, and at least one of the four acoustic characteristics corresponding to the four specific points Ps is updated. In this embodiment, since the target of one update process is the four acoustic characteristics, the target acoustic characteristic can be specified more efficiently than when the target of one update process is the two acoustic characteristics. Therefore, in this embodiment, for example, the user can easily realize the preferred acoustic characteristic only by performing the designation operation of the selection point Pu several times.

[0072] In addition, the update of the operation area ARop by the update process (the update of at least one of the four acoustic characteristics corresponding to the four specific points Ps) can also be regarded as proposing a new evaluation axis to the user. Therefore, in this embodiment, since a new evaluation axis is proposed according to the value of the acoustic parameter selected by the user, the user can also discover a new preferred sound by adjusting the acoustic characteristic.

[0073] Note that the operation of the acoustic adjustment device 100 is not limited to the example shown in FIG. 4. For example, the process of step S100 may be executed before the operation for starting the adjustment of the acoustic characteristic is executed.

[0074] As described above, in this embodiment, the acoustic adjustment device 100 includes a correspondence setting unit 114, an operation reception unit 113, a specification unit 116, and a determination unit 118. The correspondence setting unit 114 associates N acoustic characteristics (where N is a natural number of 3 or more) with N specific points Ps in the operation area ARop used for adjusting the acoustic characteristics. The operation reception unit 113 receives an operation (designation operation of the selection point Pu) for designating an arbitrary position within the operation area ARop as the selection point Pu. The specification unit 116 specifies, based on at least one specific point Ps among the N specific points Ps, the acoustic characteristic corresponding to at least one specific point Ps, and the selection point Pu, the acoustic characteristic corresponding to the selection point Pu as the selected characteristic. The determination unit 118 determines whether to determine the selected characteristic as the target acoustic characteristic set by adjusting the acoustic characteristics. When the selected characteristic is not determined as the target acoustic characteristic, the correspondence setting unit 114 executes an update process of updating at least one of the N acoustic characteristics to another acoustic characteristic other than the N acoustic characteristics, based on the selected characteristic and the N acoustic characteristics, and the operation reception unit 113 receives the operation (designation operation of the selection point Pu) again.

[0075] Thus, in this embodiment, the update process of the N acoustic characteristics associated with the N specific points Ps and the designation operation of the selection point Pu are repeated until the selected characteristic is determined as the target acoustic characteristic. In this embodiment, since the target of one update process is N acoustic characteristics, compared with the case where the target of one update process is two acoustic characteristics (for example, when the selection point Pu is designated from a slider or the like to which two acoustic characteristics are associated), the target acoustic characteristic can be specified more efficiently. For example, in this embodiment, the user can reduce the number of designation operations of the selection point Pu until the desired acoustic characteristic is realized, compared with the case where the target of one update process is two acoustic characteristics.

[0076] In addition, in the present embodiment, when specifying the selection characteristics, the specific part 116 further refers to the acoustic characteristics corresponding to the reference point Pr in the operation area ARop. Thereby, in the present embodiment, the selection characteristics can be specified more easily than in the case where the acoustic characteristics corresponding to the reference point Pr are not referred to. Also, in the present embodiment, the acoustic characteristics corresponding to the reference point Pr may be referred to in the update process. In this case, compared with the case where the acoustic characteristics corresponding to the reference point Pr are not referred to, the parameter set of the acoustic characteristics associated with the specific point Ps in the update process can be efficiently determined.

[0077] In addition, in the present embodiment, the reference point Pr is the center position of the N specific points Ps. In this case, the selection characteristics can be specified more easily than in the case where the reference point Pr is not the center position of the N specific points. Also, when the reference point Pr is the center position of the N specific points Ps, the parameter set of the acoustic characteristics associated with the specific point Ps in the update process can be efficiently determined compared with the case where the reference point Pr is not the center position of the N specific points.

[0078] In addition, in the present embodiment, the operation area ARop is a polygon having the N specific points Ps as vertices. In this case, it is possible to suppress the complexity of specifying the selection characteristics compared to the case where the specific point Ps exists inside the boundary (outer periphery) of the operation area ARop.

[0079] In addition, in the present embodiment, the N specific points Ps are four specific points Ps. That is, in the present embodiment, the operation area ARop is a quadrilateral having the four specific points Ps as vertices. In this case, it is possible to suppress the complexity of specifying the selection characteristics compared to the case where the operation area ARop is a triangle or a polygon with five or more sides.

[0080] Also, in the present embodiment, the correspondence setting unit 114 associates the selection characteristic with the reference point Pr in the update process. In this way, in the present embodiment, the acoustic characteristic (selection characteristic) corresponding to the selection point Pu specified by the designation operation of the selection point Pu before the update process is associated with the reference point Pr in the operation area ARop after the update process. That is, in the present embodiment, the operation area ARop can be updated so that the acoustic characteristic corresponding to the reference point Pr in the operation area ARop becomes an acoustic characteristic close to the acoustic characteristic preferred by the user. As a result, in the present embodiment, it is possible to suppress an increase in the number of update processes for updating the N specific points Ps as compared with the case where the position corresponding to the selection characteristic before the update process does not exist in the operation area ARop after the update process.

[0081] Also, in the present embodiment, in the update process of updating at least one of the N acoustic characteristics to another acoustic characteristic other than the N acoustic characteristics, the correspondence setting unit 114 determines the other acoustic characteristic based on the selection characteristic, the N acoustic characteristics, and the acoustic characteristic corresponding to the reference point Pr. In this way, in the present embodiment, in addition to the selection characteristic and the N acoustic characteristics, the N acoustic characteristics associated with the N specific points Ps included in the operation area ARop after the update process are determined based on the acoustic characteristic corresponding to the reference point Pr. Therefore, in the present embodiment, the probability that the position corresponding to the acoustic characteristic close to the acoustic characteristic preferred by the user is included in the operation area ARop after the update process can be increased as compared with the case where the acoustic characteristic corresponding to the reference point Pr is not used in the update process.

[0082] Also, in the present embodiment, when the correspondence setting unit 114 executes the update process two or more times, in the update processes after the second time, the selection characteristics and the N acoustic characteristics referred to in the past update processes are also referred to. Thus, in the present embodiment, when the update process is executed two or more times, the update processes after the second time are executed with reference to the information of the past update processes (the selection characteristics and the N acoustic characteristics referred to in the past update processes). Therefore, in the present embodiment, compared with the case where the update processes after the second time are executed without referring to the information of the past update processes, the probability that the position corresponding to the acoustic characteristics close to the user's preferred acoustic characteristics is included in the operation area ARop after the update process can be increased.

[0083] Also, in the present embodiment, the acoustic adjustment device 100 includes a display control unit 112. The display control unit 112 associates N labels LA each indicating the characteristics of the N acoustic characteristics with N specific points Ps and causes the input / output device 200 to display them. Thus, in the present embodiment, the N labels LA each indicating the characteristics of the N acoustic characteristics associated with the N specific points Ps are displayed in association with the N specific points Ps. Thereby, in the present embodiment, since the user can easily grasp the characteristics of the N acoustic characteristics corresponding to the N specific points Ps in the operation area ARop, the usability of the operation (for example, the designation operation of the selection point Pu) when exploring the user's preferred acoustic characteristics can be improved.

[0084] Note that the embodiments exemplified above can be variously modified. Specific modification modes applicable to the foregoing embodiments are exemplified below. Two or more modes arbitrarily selected from the following examples may be combined within a range not conflicting with each other.

[0085] In the above-described embodiment, the case where the operation area ARop is a quadrilateral having four specific points Ps as vertices is exemplified, but the present disclosure is not limited to such a mode. For example, the operation area ARop may be a triangle, a polygon with five or more sides, or a circle. This modification example (the first modification example) will be described with reference to FIG. 5.

[0086] FIG. 5 is an explanatory diagram for explaining an example of an operation area ARop according to the first modification. The black circle in the figure indicates a specific point Ps, the x mark indicates a reference point Pr, and the dashed line indicates an axis Ax. In FIG. 5, the operation area ARop of the above-described embodiment is also shown as Pattern 1.

[0087] Patterns 1, 1a, and 1b in the figure show examples of a rectangular operation area ARop. Also, Patterns 2, 2a, and 2b in the figure show examples of a hexagonal operation area ARop. Also, Patterns 3, 3a, and 3b in the figure show examples of a triangular operation area ARop. Also, Patterns 4 and 4a in the figure show examples of a circular operation area ARop.

[0088] Also, Patterns 1, 2, and 3 in the figure show examples of a polygonal operation area ARop having a specific point Ps as a vertex. Also, Pattern 4 in the figure shows an example of an operation area ARop when a specific point Ps exists on the boundary (outer periphery) of a circular operation area ARop. Also, Patterns 1a, 2a, 3a, and 4a in the figure show examples of an operation area ARop when a specific point Ps exists inside the boundary (outer periphery) of the operation area ARop. Also, Patterns 1b, 2b, and 3b in the figure show examples of an operation area ARop when a specific point Ps exists at the center of each side of a polygonal operation area ARop.

[0089] Also, in the operation area ARop shown in FIG. 5, the center position of a plurality of specific points Ps is the reference point Pr, but the reference point Pr does not have to be the center position of the plurality of specific points Ps.

[0090] Thus, the operation area ARop may have a shape other than a quadrilateral having four specific points Ps as vertices.

[0091] As described above, also in this modified example, the same effects as those of the above-described embodiment can be obtained. Further, for example, when the number of specific points Ps in the operation area ARop is large, it can be expected that the number of designation operations of the selection point Pu until the target acoustic characteristics are realized is reduced as compared with the case where the number of specific points Ps in the operation area ARop is small.

[0092] In the above-described embodiment and modified example, the case where the acoustic characteristics to be adjusted are the gains for each frequency band has been exemplified. However, the present disclosure is not limited to such an aspect.

[0093] For example, in this modified example (second modified example), the acoustic characteristics to be adjusted may be acoustic characteristics other than the gains for each frequency band, or may be a combination of the gains for each frequency band and acoustic characteristics other than the gains for each frequency band. Specifically, for example, the acoustic characteristics to be adjusted may be one or more of the gain of each frequency band, the frequency, the bandwidth of the frequency band (so-called Q width), the delay in the surround system, and the volume balance in the surround system (for example, the gain for each speaker). Alternatively, the acoustic characteristics to be adjusted may be one or more of the effect intensity indicating the degree of correction effect on the high-frequency band, the effect intensity indicating the degree of correction effect on the low-frequency band, and the effect intensity indicating the degree of effect in the surround system. Further, the acoustic characteristics to be adjusted may be a combination of the above-described gain, frequency, Q width, delay, volume balance, and a plurality of effect intensities.

[0094] As described above, also in this modified example, the same effects as those of the above-described embodiment and modified example can be obtained.

[0095] In the above-described embodiment and modified example, the case where the acoustic system 10 is an in-vehicle audio device, that is, the case where the acoustic adjustment device 100 is used to adjust the acoustic characteristics of the in-vehicle audio device has been exemplified. However, the present disclosure is not limited to such an aspect.

[0096] For example, in this modification example (the third modification example), the acoustic adjustment device 100 may be used to adjust the acoustic characteristics of an acoustic system other than in-vehicle audio equipment. Specifically, for example, the acoustic adjustment device 100 may be used to adjust the acoustic characteristics of earphones, or may be used to adjust the acoustic characteristics of a sound bar. Also, for example, the acoustic adjustment device 100 may be used to adjust the acoustic characteristics of a synthesizer, or may be used to adjust the acoustic characteristics of an electronic piano. That is, the acoustic adjustment device 100 may be used to adjust the acoustic characteristics of electronic musical instruments. In this modification example, the acoustic adjustment device 100 may be a terminal device such as a smartphone that executes the control program PG shown in FIG. 1, or may be an information processing device such as a personal computer that executes the control program PG.

[0097] As described above, also in this modification example, the same effects as those of the above-described embodiments and modification examples can be obtained.

[0098] Also, in the above-described embodiments and modification examples, when specifying the selection characteristics, the case where the acoustic characteristics corresponding to the reference point Pr in the operation region ARop are referred to was exemplified, but the present disclosure is not limited to such an aspect.

[0099] For example, in this modification example (the fourth modification example), the acoustic characteristics corresponding to the reference point Pr in the operation region ARop may be the average of the N acoustic characteristics associated with the N specific points Ps. In this case, even if the acoustic characteristics are not previously associated with the reference point Pr, the acoustic characteristics corresponding to the reference point Pr can be easily specified based on the N acoustic characteristics. Therefore, when the average of the N acoustic characteristics associated with the N specific points Ps is the acoustic characteristics corresponding to the reference point Pr, the selection characteristics may be specified based on the N acoustic characteristics associated with the N specific points Ps without referring to the acoustic characteristics corresponding to the reference point Pr. Also, for example, when the acoustic characteristics corresponding to the reference point Pr are flat frequency characteristics with a gain of 0 dB in each frequency band, the selection characteristics may be specified without referring to the acoustic characteristics corresponding to the reference point Pr.

[0100] As described above, also in this modification example, the same effects as those of the above-described embodiments and modification examples can be obtained, except for the effects obtained by referring to the acoustic characteristics corresponding to the reference point Pr when specifying the selection characteristics.

[0101] In addition, in the above-described embodiments and modification examples, the case where the selection characteristics are associated with the reference point Pr in the update process has been exemplified, but the present disclosure is not limited to such a mode.

[0102] For example, in this modification example (the fifth modification example), even when the update process is executed, the acoustic characteristics corresponding to the reference point Pr may be the average of the N acoustic characteristics associated with the N specific points Ps. Also, for example, the acoustic characteristics corresponding to the reference point Pr may be fixed to the flat frequency characteristics where the gain of each frequency band is 0 dB.

[0103] As described above, also in this modification example, the same effects as those of the above-described embodiments and modification examples can be obtained, except for the effects obtained by associating the selection characteristics with the reference point Pr in the update process.

[0104] In addition, in the above-described embodiments and modification examples, the case where the update process is executed based on the selection characteristics, the N acoustic characteristics, and the acoustic characteristics corresponding to the reference point Pr has been exemplified, but the present disclosure is not limited to such a mode.

[0105] For example, in this modification example (the sixth modification example), when the average of the N acoustic characteristics associated with the N specific points Ps is the acoustic characteristics corresponding to the reference point Pr, the update process may be executed without referring to the acoustic characteristics corresponding to the reference point Pr. Also, for example, when the acoustic characteristics corresponding to the reference point Pr are the flat frequency characteristics where the gain of each frequency band is 0 dB, the update process may be executed without referring to the acoustic characteristics corresponding to the reference point Pr.

[0106] As described above, also in this modification example, the same effects as those of the above-described embodiment and modification examples can be obtained, except for the effects obtained by executing the update process with reference to the acoustic characteristics corresponding to the reference point Pr.

[0107] Further, in the above-described embodiment and modification examples, when the update process is executed two or more times, the case where the selection characteristics and the N acoustic characteristics referred to in the past update process are also referred to in the update process after the second time is exemplified. However, the present disclosure is not limited to such a mode.

[0108] For example, in this modification example (seventh modification example), in the update process, the selection characteristics and the N acoustic characteristics referred to in the past update process may not be referred to. As described above, also in this modification example, the same effects as those of the above-described embodiment and modification examples can be obtained, except for the effects obtained by referring to the selection characteristics and the N acoustic characteristics referred to in the past update process in the update process after the second time.

[0109] Further, in the above-described embodiment and modification examples, the case where the N labels LA respectively indicating the characteristics of the N acoustic characteristics are displayed in association with the N specific points Ps is exemplified. However, the present disclosure is not limited to such a mode.

[0110] For example, in this modification example (eighth modification example), the N labels LA may not be displayed in association with the N specific points Ps. As described above, also in this modification example, the same effects as those of the above-described embodiment and modification examples can be obtained, except for the effects obtained by displaying the N labels LA in association with the N specific points Ps.

Description of Reference Numerals

[0111] 10... Acoustic system, 100... Acoustic adjustment device, 110... Processing device, 112... Display control unit, 113... Operation reception unit, 114... Corresponding setting unit, 116... Specifying unit, 118... Determination unit, 140... Storage device, 200... Input / output device, 300... Signal processing device, 400... Sound playback device, ARop... Operation area, Pr... Reference point, Ps... Specific point, Pu... Selection point.

Claims

1. Associate N acoustic characteristics with N specific points (N is a natural number of 3 or more) within an operation area used for adjusting acoustic characteristics, Receive an operation of designating an arbitrary position within the operation area as a selection point, Based on at least one of the N specific points, the acoustic characteristic corresponding to the at least one specific point, and the selection point, specify the acoustic characteristic corresponding to the selection point as a selection characteristic, Determine whether to determine the selection characteristic as a target acoustic characteristic set by adjusting the acoustic characteristic, When the selection characteristic is not determined as the target acoustic characteristic, perform an update process of updating at least one of the N acoustic characteristics to another acoustic characteristic other than the N acoustic characteristics, based on the selection characteristic and the N acoustic characteristics, and receive the operation again, An acoustic adjustment method.

2. When specifying the selection characteristic, further refer to the acoustic characteristic corresponding to a reference point within the operation area, The acoustic adjustment method according to Claim 1.

3. The reference point is the central position of the N specific points, The acoustic adjustment method according to Claim 2.

4. The operation area is a polygon having the N specific points as vertices, The acoustic adjustment method according to Claim 1.

5. The N specific points are 4 specific points, The acoustic adjustment method according to Claim 4.

6. In the update process, associate the selection characteristic with the reference point, The acoustic adjustment method according to Claim 2 or Claim 3.

7. In the update process, determine the other acoustic characteristic based on the selection characteristic, the N acoustic characteristics, and the acoustic characteristic corresponding to the reference point, The acoustic adjustment method according to Claim 2 or Claim 3.

8. When the update process is executed two or more times, in the update process after the second time, also refer to the selection characteristic and the N acoustic characteristics referred to in the past update process, The acoustic adjustment method according to any one of Claims 1 to 5.

9. Associate N labels each indicating a feature of the N acoustic characteristics with the N specific points and display them on a display device, The acoustic adjustment method according to any one of Claims 1 to 5.

10. A correspondence setting unit that associates N acoustic characteristics with N specific points (N is a natural number of 3 or more) within an operation area used for adjusting acoustic characteristics, An operation reception unit that receives an operation of designating an arbitrary position within the operation area as a selection point, a specifying unit that specifies, based on at least one specific point among the N specific points, the acoustic characteristic corresponding to the at least one specific point, and the selection point, the acoustic characteristic corresponding to the selection point as a selection characteristic; a determination unit that determines whether to determine the selection characteristic as a target acoustic characteristic set by adjusting the acoustic characteristic; comprising; when the selection characteristic is not determined as the target acoustic characteristic; the corresponding setting unit executes an update process of updating at least one of the N acoustic characteristics to another acoustic characteristic other than the N acoustic characteristics, based on the selection characteristic and the N acoustic characteristics; the operation reception unit receives the operation again; an acoustic adjustment device.

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