Electronic musical instrument

Abstract

Electronic musical instrument (1), comprising: a sound source (80) which, in accordance with an instruction signal to direct the production of a sound, produces a first sound signal corresponding to a string striking sound and a second sound signal corresponding to a keyboard floor striking sound; a first output unit that outputs a third sound signal containing the first sound signal and the second sound signal at a first sound volume ratio; and a second output unit that outputs a fourth sound signal containing the first sound signal and the second sound signal at a second sound volume ratio that differs from the first sound volume ratio.

Description

Technical area

[0001] The present invention relates to a technology for generating a sound signal in an electronic musical instrument. State of the art

[0002] Various devices have been developed to make electronic piano sounds as close as possible to those of acoustic pianos. One example is Patent Literature 1, in which, when playing an acoustic piano, when a key is pressed, not only a string strike sound is generated but also a keyboard strike sound is generated along with the key press. In the field of electronic musical instruments, such as electronic pianos, technologies for reproducing such keyboard strike sounds have been disclosed.

[0003] Patent Literature 2 discloses the generation of output signals of an electronic piano by adding an effect sound signal corresponding to reverberation or resonance to a normal sound signal. Patent Literature 3 discloses an electronic musical instrument that utilizes correction of sound signals input to a speaker or a headphone jack, applying an equalization process, a sound image localization process, and a reverberation process to the sound signals. Citation listPatent literature Patent Literature 1: Japanese Patent Application Disclosure JP 2014-059534 A Patent literature 2: DE 10 2012 204 801 A1 Patent Literature 3: US 5,939,656 A Brief description of the inventionTechnical task

[0004] Most electronic pianos include speakers for outputting piano sounds. Generating a piano sound using the technology disclosed in Patent Literature 1 causes the sound output from a speaker to include a keyboard strike sound. Meanwhile, to realize a playing feel close to the sense of playing an acoustic piano, a structure similar to that of an acoustic piano is sometimes used as the mechanical structure of parts (key assembly) surrounding the keys in an electronic piano. In such a case, there is no need to aggressively employ the technology disclosed in Patent Literature 1 because an actually generated keyboard strike sound is heard by the player, as is the case with an acoustic piano.

[0005] In addition to a speaker, an electronic piano includes an output port that outputs an acoustic signal to an external device such as headphones, allowing the external device to produce sound. When using headphones, it becomes difficult for the player to hear the actual keyboard strike sound. Therefore, compared to hearing a sound from the speaker, the player would have to hear a sound without the keyboard strike sound.

[0006] Meanwhile, a case will be discussed where the technology disclosed in Patent Literature 1 is used so that the player can hear a keyboard strike sound even when the player uses headphones. In this case, the use of the speaker causes a mechanically generated keyboard strike sound and a keyboard strike sound from the speaker to be heard as an overlapping sound. In both cases, the player had to hear different sounds depending on the difference between devices that output sounds. Accordingly, the player had to feel such unnaturalness that the sounds vary from listening environment to listening environment, even when the player performs the same performance.

[0007] The object of the present invention is to provide a technology that makes it possible to make sounds differ as little as possible from each other, despite the difference between devices that output sounds. Solution to the task

[0008] According to one embodiment of the present invention, an electronic musical instrument according to claim 1 is provided.

[0009] The instruction signal may include pitch information for indicating a pitch of a sound to be generated. In a case where the pitch information has changed from a first pitch to a second pitch different from the first pitch, the sound source may cause a pitch change of the first sound signal in accordance with a pitch difference between the first pitch and the second pitch, but not cause a pitch change of the second sound signal, or cause a pitch change of the second sound signal by a pitch difference smaller than the pitch change of the first sound signal, and a proportion of the second sound signal relative to the first sound signal at the second sound volume ratio may be greater than a proportion of the second sound signal relative to the first sound signal at the first sound volume ratio.

[0010] The electronic musical instrument may further include a performance operator for generating the instruction signal, the instruction signal may include operation information that changes according to an operation content of the performance operator in response to the instruction to generate a sound, the sound source may change a relative relationship between a timing of generation of the first sound signal and a timing of generation of the second sound signal according to the operation information, a proportion of the second sound signal relative to the first sound signal at the second sound volume ratio may be larger than a proportion of the second sound signal relative to the first sound signal at the first sound volume ratio.

[0011] A proportion of the second sound signal relative to the first sound signal may be 0 at the first sound volume ratio.

[0012] According to a further embodiment of the present invention, an electronic musical instrument according to claim 5 is provided.

[0013] The instruction signal may include pitch information for indicating a pitch of a sound to be produced, and in a case where the pitch information has changed from a first pitch to a second pitch different from the first pitch, the sound source may cause a pitch change of the first sound signal in accordance with a pitch difference between the first pitch and the second pitch, but may not cause a pitch change of the second sound signal or may not cause a pitch change of the second sound signal smaller than the pitch difference of the first sound signal.

[0014] The electronic musical instrument may further include a performance operator for generating the instruction signal, the instruction signal may include operation information that changes according to an operation content of the performance operator in response to the instruction to generate a sound, the sound source may change a relative relationship between a timing of generation of the first sound signal and a timing of generation of the second sound signal according to the operation information.

[0015] The first output unit may be a speaker that outputs the third sound signal as sound, and the second output unit may be an output terminal through which the fourth sound signal is output to an external device.

[0016] In a case where the external device is connected to the output terminal, the third sound signal output from the speaker may be limited.

[0017] In a case where the external device is not connected to the output terminal, the fourth sound signal output from the output terminal may be restricted.

[0018] The electronic musical instrument may further include a performance operator for generating the instruction signal and a first element struck by the performance operator or a second element connected to the performance operator to generate the keyboard bottom striking sound in response to an operation of the performance operator.

[0019] The game operator may include a key, and the first element may be a keyboard base or an element connected to the keyboard base.

[0020] The sound source may further generate a fifth sound signal, ie the third sound signal output by the first output unit may further contain the fifth sound signal, and a time of generation of the fifth sound signal may be later than a time of generation of the second sound signal.

[0021] According to a further embodiment of the present invention, an electronic musical instrument according to claim 14 is provided Advantageous effects of the invention

[0022] The present invention makes it possible to provide a technology that makes it possible to make sounds differ as little as possible from each other despite the difference between devices that output sounds. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of an electronic musical keyboard instrument according to a first embodiment of the present invention. Fig. 2 is a diagram showing a mechanical structure (key assembly) associated with a key according to the first embodiment of the present invention. Fig. 3 is a block diagram showing a functional configuration of a sound source according to the first embodiment of the present invention. Fig. 4 is a diagram explaining a string striking sound volume table according to the first embodiment of the present invention. Fig. 5 is a diagram explaining a touch sound volume table according to the first embodiment of the present invention. Fig. 6 is a diagram explaining a string striking sound delay table and a striking sound delay table according to the first embodiment of the present invention. Fig. 7 is a diagram explaining the timings of generation of string striking sounds and attack sounds with respect to note-ons according to the first embodiment of the present invention. Fig. 8 is a diagram explaining a relationship between the pitches of a string striking sound and a striking sound with respect to note numbers according to the first embodiment of the present invention. Fig. 9 is a diagram explaining the sound volume relationship between a string striking sound and a striking sound according to the first embodiment of the present invention. Fig. 10 is a block diagram showing a functional configuration of a sound source according to a second embodiment of the present invention. Fig. 11 is a block diagram showing a functional configuration of a sound source according to a third embodiment of the present invention. Description of the embodiments

[0023] Hereinafter, an electronic musical keyboard instrument according to an embodiment of the present invention will be described in detail with reference to the drawings. Embodiments to be described below are examples of embodiments of the present invention, and the present invention is not construed within the limitations of these embodiments. Note that, in the drawings referred to in the present embodiment, identical parts or parts having the same functions have identical characters or similar characters (characters each formed by adding A, B, or the like to the end of a number), and repeated descriptions thereof may be omitted. <Erste Ausführungsform> [Configuration of the musical keyboard instrument]

[0024] Fig. 1 is a diagram illustrating a configuration of an electronic musical keyboard instrument according to a first embodiment of the present invention. An electronic musical keyboard instrument 1 is, for example, an electronic piano and is an example of an electronic musical instrument having a plurality of keys 70 as performance operators. Operation of a key 70 by a user causes a sound to be produced from a speaker 60. The tones (timbres) to be produced vary by use of an operation unit 21. In this example, when generating sounds by using a piano sound, the electronic musical keyboard instrument 1 can produce sounds close to those of an acoustic piano. Specifically, the electronic musical keyboard instrument 1 can reproduce sounds of a piano in which keyboard bottom strike sounds are included.The individual components of the electronic musical keyboard instrument 1 are described in detail below.

[0025] The electronic musical keyboard instrument 1 includes a plurality of keys 70 (performance operators). The plurality of keys 70 are rotatably supported by the housing 50. The housing 50 is equipped with the operation unit 21, a display unit 23, and the speaker 60 (first output unit). The housing 50 has a control unit 10, a storage unit 30, a key response measuring unit 75, and a sound source 80 arranged therein. The components arranged in the housing 50 are connected to each other via a bus.

[0026] In this example, the electronic musical keyboard instrument 1 includes an interface whose signals are input and output to and from an external device. Examples of the interface include a connector through which a sound signal is output to the external device, a cable connection connector through which MIDI data is transmitted and received, and the like. In this example, an output connector (second output unit) through which a sound signal is output includes a headphone connector 91 to which a headphone as an external device is connected, and a LINE connector 95 to which the LINE output is performed.

[0027] The control unit 10 includes an arithmetic processing circuit such as a CPU and a storage device such as a RAM or ROM. The control unit 10 executes a control program stored in the storage unit 30 via the CPU and enables the electronic musical keyboard instrument 1 to achieve various types of functions. The operation unit 21 includes devices such as operation buttons, a touch sensor, and sliders, and outputs a signal to the control unit 10 corresponding to an input operation. The display unit 23 displays a screen based on the control by the control unit 10.

[0028] The storage unit 30 is a storage device, e.g., a non-volatile memory. The storage unit 30 stores the control program executed by the control unit 10. Furthermore, the storage unit 30 may store parameters, waveform data, and the like used in the sound source 80. The speaker 60 amplifies and outputs a sound signal output from the control unit 10 or the sound source 80, thereby generating a sound corresponding to the sound signal.

[0029] The key behavior measurement unit 75 measures the behavior of each key 70 and outputs measurement data representing a measurement result. In this example, the measurement data includes information corresponding to a key 70 that has been pressed and a press amount (operation amount) of the key 70. In this example, the key behavior measurement unit 75 is designed to output detection signals corresponding to the press amounts upon detection of the first, second, and third press amounts of a key 70. The key 70 that has been pressed can be identified by including information (e.g., a key number) indicating the key 70. [Keyboard layout configuration]

[0030] Fig. 2 is a diagram showing a mechanical structure (key assembly) associated with a key according to the first embodiment of the present invention. Fig. 2 shows a description by taking as an example a structure associated with a white key of the keys 70. A keyboard bottom 58 is a member constituting a part of the aforementioned housing 50. A frame 78 is fixed to the keyboard bottom 58. A key support member 781 projected upward from the frame 78 is disposed on the frame 78. The key support member 781 supports the key 70 so that the key 70 can rotate on a spindle 782. A hammer support 785 projected downward from the frame 78 is disposed. A hammer 76 is disposed on a side of the frame 78 opposite the key 70. The hammer support member 785 supports the hammer 76 so that the hammer 76 can rotate on a spindle 765.

[0031] A hammer connecting part 706, which is projected to a lower position than the key 70, includes a coupling part 707 at a lower end thereof. The key connecting part 761 and the coupling part 707, which are arranged at one end of the hammer 76, are slidably connected to each other. The hammer 76 includes a weight 768 (second element) on a side of the spindle 765 opposite the key connecting part 761. When the key 70 is not operated, the weight 768 is placed on a lower limit stop 791 by its own weight.

[0032] Meanwhile, pressing the key 70 causes the key connecting part 761 to move downward, and the rotation of the hammer 76 causes the weight 768 to move upward. A collision of the weight 768 with an upper limit stop 792 (first element) restricts the rotation of the hammer 76, so that the key 70 can no longer be pressed. A strong pressure on the key 70 causes the hammer 76 (weight 768) to hit the upper limit stop 792, and subsequently an impact sound is generated. This impact sound can be transmitted to the keyboard bottom 58 via the frame 78 and emitted as a louder sound. In the configuration of Fig. 2 this sound corresponds to a keyboard bottom strike sound.

[0033] It should be noted that the key layout does not match the one in Fig. 2, as long as it is a structure in which a touch sound is generated by pressing the key 70. The key arrangement may, for example, be a structure in which the key 70, when pressed, strikes the keyboard bottom 58 directly. Alternatively, the key arrangement may be a structure in which, as in Fig. 2, pressing the key 70 causes an element moving parallel to the key 70 to strike the keyboard bottom 58 or an element connected to the keyboard bottom 58. In both cases, the key arrangement need only be a structure in which pressing the key 70 causes a striking sound to be generated by the occurrence of a collision in any part.

[0034] The key response measurement unit 75 (first sensor 75-1, second sensor 75-2, third sensor 75-3) is arranged between the frame 78 and the key 70. Pressing the key 70 causes the first sensor 75-1 to output a first detection signal when the key 70 has reached the first pressing amount. Then, the second sensor 75-2 outputs a second detection signal when the key 70 has reached the second pressing amount. Furthermore, the third sensor 75-3 outputs a third detection signal when the key 70 has reached the third pressing amount. A pressing speed and acceleration of the key 70 can be calculated from temporal differences in the output timing between the detection signals.

[0035] In this example, the control unit 10 calculates a first printing speed based on the time from the output time of the first detection signal to the output time of the second detection signal and predetermined distances (here, distances to the first printing amount and the second printing amount). Similarly, the control unit 10 calculates a second printing speed based on the time from the output time of the second detection signal to the output time of the third detection signal and predetermined distances (here, distances to the second printing amount and the third printing amount). The control unit 10 calculates a printing acceleration based on the first printing speed and the second printing speed.In addition, the control device 10 outputs a note-on Non to the sound source 80 upon detection of the third detection signal, and outputs a note-off Noff to the sound source 80 after outputting the note-on Non and interrupting the output of the first detection signal for the same key.

[0036] When a note-on Non is output, a key number Note, a pressure velocity Vel (the first pressure velocity or the second pressure velocity), and a pressure acceleration Acc are output in conjunction with the note-on Non. The key number Note is information for identifying the key 70 that was pressed and corresponds to information (pitch information) that characterizes the pitch of a sound.

[0037] On the other hand, when a note-off Noff is output, the key number Note is output in conjunction with the note-off Noff. Note that in the following description, this information (operation information) output by the control unit 10 along with the operation of the key 70 is supplied to the sound source 80 as an instruction signal that provides an instruction for generating a sound.

[0038] The description continues with further reference to Fig. 1. The sound source 80 generates a sound signal in accordance with an instruction signal output from the control unit 10, including a note-on Non, a note-off Noff, a key number Note, a pressing velocity Vel, and a pressing acceleration Acc, and outputs the sound signal to the speaker 60. For each operation of the key 70, a sound signal is obtained, which the sound source 80 generates. Furthermore, multiple sound signals obtained by multiple key pressing operations are combined and output from the sound source 80. A configuration of the sound source 80 will be described in detail below. [Sound source configuration]

[0039] Fig. 3 is a block diagram illustrating a functional configuration of a sound source according to the first embodiment of the present invention. The sound source 80 includes a string striking sound signal output unit 81, a striking sound signal output unit 82, a speaker output synthesizer unit 83, a terminal output synthesizer unit 84, an output switching unit 85, and an amplified output unit 86.

[0040] The string striking sound signal output unit 81 outputs a sound signal (string striking sound signal: first sound signal) corresponding to a string striking sound of a piano according to an instruction signal supplied in response to the pressing of a key 70. The string striking sound signal output unit 81 includes a string striking sound waveform memory 811, a string striking sound signal generation unit 813, a string striking sound volume table 815, and a string striking sound delay table 817.

[0041] The String Striking Sound Waveform Memory 811 stores waveform data representing the string striking sounds of a piano. This waveform data is obtained by sampling the sounds of an acoustic piano (i.e., sounds produced by string striking caused by key pressing). In this example, waveform data of various pitches is stored in association with key numbers.

[0042] The string striking sound signal generation unit 813 reads waveform data from the string striking sound waveform memory 811 in accordance with an instruction signal, submits the waveform data to envelope processing controlled by ADSR parameters, for example, and outputs the waveform data as a string striking sound signal. The string striking sound signal is output to the speaker output synthesizer unit 83 and the terminal output synthesizer unit 84.

[0043] The string striking sound signal generation unit 813 determines the pitch of the waveform data to be read based on the key number "Note." The string striking sound signal generation unit 813 thereby generates a string striking sound signal with a pitch corresponding to the key number "Note." That is, when the key number "Note" has changed by a predetermined pitch difference, the pitch of the string striking sound signal changes according to this pitch difference. The string striking sound signal generation unit 813 determines the volume (maximum amplitude) of the string striking sound signal with reference to the string striking sound volume table 815. The string striking sound signal generation unit 813 determines a delay time from receiving an instruction signal representing a note-on non-note until outputting a string striking sound signal with reference to the string striking sound delay table 817.The generation time (production time) of the string striking sound signal changes according to this delay time. The string striking sound volume table 815 and the string striking sound delay table 817 will be described in detail later.

[0044] The touch sound signal output unit 82 outputs an acoustic signal (touch sound signal: second sound signal) corresponding to a keyboard bottom touch sound according to an instruction signal supplied in response to the pressing of a key 70. The touch sound signal output unit 82 includes a touch sound waveform memory 821, a touch sound signal generation unit 823, a touch sound volume table 825, and a touch sound delay table 827.

[0045] The touch sound waveform memory 821 stores waveform data representing keyboard touch sounds of a piano. This waveform data is waveform data obtained by sampling keyboard touch sounds produced by pressing the keys of an acoustic piano. Unlike the string touch sound waveform memory 811, which stores waveform data, the touch sound waveform memory 821 does not store waveform data whose pitches vary depending on the key number. That is, the touch sound waveform memory 821 stores common waveform data regardless of the key number.

[0046] The attack sound signal generation unit 823 reads waveform data from the attack sound waveform memory 821 in accordance with an instruction signal and outputs the waveform data as a attack sound signal. The attack sound signal is output to the speaker output synthesizer unit 83 and the terminal output synthesizer unit 84. Note that, in this example, although envelope processing is not performed on the attack sound signal, it can be performed. In a case where envelope processing is not performed, the attack sound waveform memory 821 has waveform data of a predetermined period stored therein. Upon reading out waveform data in accordance with an instruction signal for a predetermined period, the attack sound signal generation unit 823 stops generating an attack sound signal corresponding to this instruction signal.

[0047] The attack sound signal generation unit 823 determines the volume (maximum amplitude) of the attack sound signal with reference to the attack sound volume table 825. The attack sound signal generation unit 823 determines a delay time from the receipt of an instruction signal representing a note-on non to the output of a attack sound signal with reference to the attack sound delay table 827. The generation timing (production timing) of the attack sound signal changes according to this delay time. It should be noted that in this example, where the attack sound waveform memory 821 does not have waveform data of various pitches stored therein, the attack sound signal generation unit 823 does not need to use the key number "Note." That is, the pitch of the attack sound signal does not change even if the key number "Note" changes by a predetermined pitch difference.

[0048] The following describes the specific contents of each table (String Striking Sound Volume Table 815, Strike Sound Volume Table 825, String Striking Sound Delay Table 817, Strike Sound Delay Table 827).

[0049] Fig. Fig. 4 is a diagram explaining a volume table for string striking sound according to the first embodiment of the present invention. As shown in Fig. 4, the string striking sound volume table defines a relationship between a pressure speed Vel and a string striking sound volume Va. In this example, the higher the pressure speed Vel becomes, the higher the string striking sound volume Va becomes. It should be noted that, although in the example in Fig. 4 The printing speed Vel and the string striking sound volume Va are defined by a relationship that can be expressed by a linear function, it is possible to adopt any relationship within a limit of a relationship that the string striking sound volume Va can be determined with respect to the printing speed Vel. Furthermore, the string striking sound volume Va can be determined by using the printing acceleration Acc instead of the printing speed Vel or with a combination of the printing speed Vel and the printing acceleration Acc.

[0050] Fig. 5 is a diagram explaining a volume table for touch sound according to the first embodiment of the present invention. As shown in Fig. 5, the touch sound volume table defines a relationship between the pressure acceleration Acc and a touch sound volume Vb. In this example, the higher the pressure acceleration Acc becomes, the higher the touch sound volume Vb becomes. It should be noted that, although in the example in Fig. 5 The pressure acceleration Acc and the impact sound volume Vb are defined by a relationship that can be expressed by a linear function, it is possible to adopt any relationship within a limit of a relationship that the impact sound volume Vb can be determined with respect to the pressure acceleration Acc. Furthermore, the impact sound volume Vb can be determined by using the pressure velocity Vel instead of the pressure acceleration Acc, or by using a combination of the pressure velocity Vel and the pressure acceleration Acc.

[0051] Fig. Figure 6 is a diagram explaining a string-strike sound delay table and a strike sound delay table according to the first embodiment of the present invention. Both tables define a relationship between the pressure acceleration Acc and a delay time td. Fig. Figure 6 shows the delay table for string striking sound 817 and the delay table for striking sound 827 in contrast. The delay table for string striking sound 817 defines a relationship between the pressure acceleration Acc and the delay time td (hereinafter referred to as "string striking sound delay time t1"). The delay table for striking sound 827 defines a relationship between the pressure acceleration Acc and the delay time td (hereinafter referred to as "strike sound delay time t2"). In both tables, the higher the pressure acceleration Acc becomes, the shorter the delay time td (t1, t2) becomes.

[0052] When the pressing acceleration Acc is A2, the delay time for string striking sound t1 and the delay time for string striking sound t2 become equal to each other. When the pressing acceleration Acc is A1, which is smaller than A2, the striking sound delay time t2 becomes a longer time than the delay time for string striking sound t1. On the other hand, when the pressing acceleration Acc is A3, which is greater than A2, the delay time for string striking sound t2 becomes a shorter time than the delay time for string striking sound t1. A2 can be "0". In this case, A1 takes a negative value and indicates a gradual deceleration during pressing. On the other hand, A3 takes a positive value and indicates a gradual acceleration during pressing.

[0053] It should be noted that although in the example in Fig. 6 The printing acceleration Acc and the deceleration time td are defined by a relationship that can be expressed by a linear function, it is possible to adopt any relationship within a limit of a relationship that the deceleration time td can be determined in terms of the printing acceleration Acc. Furthermore, the deceleration time td can be determined by using the printing velocity Vel instead of the printing acceleration Acc, or by using a combination of the printing velocity Vel and the printing acceleration Acc.

[0054] Fig. Fig. 7 is a diagram explaining the timing of the generation of string strike sounds and attack sounds with respect to note-ons according to the first embodiment of the present invention. A1, A2, and A3 in Fig. 7 correspond to the values ​​of pressure acceleration Acc in Fig. 6. That is, the relationship between the pressure accelerations is defined as A1 < A2 < A3. A time signal is displayed along each horizontal axis. The character "ON" denotes a time of receipt of an instruction signal representing a note-on non. The character "Sa" denotes a time of start of generation of a string striking sound signal, and the character "Sb" denotes a time of start of generation of a striking sound signal. Accordingly, the delay time for string striking sound t1 corresponds to the time from "ON" to "Sa." The delay time for striking sound t2 corresponds to the time from "ON" to "Sb." As shown in Fig. As shown in Figure 7, the higher the pressure acceleration, the closer the generation times of both the string strike signal and the strike sound signal are to the note-on non. Furthermore, the strike sound signal is larger than the string strike sound signal in proportion to the change in generation time. Accordingly, the relative relationship between the generation time of the string strike sound signal and the generation time of the strike sound signal changes according to the pressure acceleration.

[0055] Each table has been described above. As mentioned above, the string attack sound signal generation unit 813 determines the pitch of the waveform data to be read out based on the key number "Note." On the other hand, in this example, the attack sound signal generation unit 823 does not allow the pitch of the waveform data to be read out based on the key number "Note."

[0056] Fig. 8 is a diagram explaining a relationship between the pitches of a string striking sound and a striking sound with respect to note numbers according to the first embodiment of the present invention. Fig. 8 shows a relationship between the key number note and the pitch P. Fig. Figure 8 shows the pitch p1 of a string striking sound and the pitch p2 of a striking sound in contrast to each other. A change in the key number Note results in a change in the pitch p1 of a string striking sound. On the other hand, even a change in the key number Note does not result in a change in the pitch p2 of a striking sound. In other words, the pitch p1 of a string striking sound varies from a case where the key number is Note N1 to a case where the key number is Note N2. On the other hand, the pitch p2 of a striking sound remains the same in a case where the key number is Note N1 and in a case where the key number is Note N2. It should be noted that the pitch p1 of a string striking sound and the pitch p2 of a striking sound, as in Fig. 8, indicate their respective change tendencies with respect to the key number note and do not indicate any magnitude relationship between them.

[0057] The description continues with further reference to Fig. 3. The speaker output synthesizer unit 83 includes amplifier units 831 and 832 and a synthesizer unit 835. The amplifier unit 831 amplifies a string striking sound signal output from the string striking sound signal generating unit 813 by a predetermined amplification factor. The amplifier unit 832 amplifies a striking sound signal output from the striking sound signal generating unit 823 by a predetermined amplification factor. The synthesizer unit 835 combines the string striking sound signal amplified by the amplifier unit 831 and the striking sound signal amplified by the amplifier unit 832 by addition and outputs them.These configurations cause the speaker output synthesizer unit 83 to output a speaker sound signal (third sound signal) generated by combining the string striking sound signal and the striking sound signal at a predetermined first sound volume ratio.

[0058] The terminal output synthesizer unit 84 includes amplifier units 841 and 842 and a synthesizer unit 845. The amplifier unit 841 amplifies a string striking sound signal output from the string striking sound signal generating unit 813 by a predetermined amplification factor. The amplifier unit 842 amplifies a striking sound signal output from the striking sound signal generating unit 823 by a predetermined amplification factor. The synthesizer unit 845 combines the string striking sound signal amplified by the amplifier unit 841 and the striking sound signal amplified by the amplifier unit 842 by addition and outputs them.These configurations cause the terminal output synthesizer unit 84 to output a terminal sound signal (fourth sound signal) generated by combining the string striking sound signal and the striking sound signal at a predetermined second sound volume ratio. Note that in the following description, the first sound volume ratio and the second sound volume ratio both refer to the ratio of the maximum amplitude (corresponding to the striking sound volume Vb) of the striking sound signal to the maximum amplitude (corresponding to the string striking sound volume Va) of the string striking sound signal.

[0059] Fig. 9 is a diagram explaining the sound volume relationship between a string striking sound and a striking sound according to the first embodiment of the present invention. Fig. 9 shows a relationship RS between the string striking sound volume Va and the striking sound volume Vb in a speaker sound signal, and a relationship RT between the string striking sound volume Va and the striking sound volume Vb in a terminal sound signal. The proportion of the striking sound volume Vb to the string striking sound volume Va corresponds to the slope of each of the relationships. The slope of the relationship RS corresponds to the first sound volume ratio. The slope of the relationship RT corresponds to the second sound volume ratio. That is, the ratio between the amplification factors of the amplification units 831 and 832 in the speaker output synthesizer unit 83 is set by a value corresponding to the slope of the relationship RS.Furthermore, the relationship between the amplification factors of the amplification units 841 and 842 in the terminal output synthesizer unit 84 is determined by a value corresponding to the slope of the relationship RT.

[0060] As in Fig. As shown in Figure 9, the second sound volume ratio (relationship RT) is greater than the first sound volume ratio (relationship RS). Note that the first sound volume ratio and the second sound volume ratio only need to satisfy this relationship and can be changed using the operation unit 21. Furthermore, the first sound volume ratio (relationship RS) may be defined as 0. That is, the ratio of the attack sound signal (attack sound volume Vb) to the string attack sound signal (string attack sound volume Va) may be 0. In this case, a configuration of the second embodiment mentioned below may be adopted.

[0061] The description continues with further reference to Fig. 3. The output switching unit 85 includes switches 851 and 852. The switch 851 is provided on a path (hereinafter referred to as the "speaker path") of a sound signal from the speaker output synthesizer unit 83 to the speaker 60. The switch 852 is provided on a path (hereinafter referred to as the "headphone path") of a sound signal from the terminal output synthesizer unit 84 to the headphone terminal 91. As shown in Fig. As shown in Figure 3, when no plug is connected to the headphone jack 91, the output switching unit 85 turns on the switch 851 to connect the speaker path and turns off the switch 852 to disconnect the headphone path. However, when a predetermined detection signal is supplied from a connection detection circuit 89, the output switching unit 85 turns off the switch 851 to disconnect the speaker path and turns on the switch 852 to connect the headphone path. The predetermined detection signal is a signal that the connection detection circuit 89 outputs when a connection plug such as a headphone is connected to the headphone jack 91.

[0062] Note that a sound signal (connection sound signal) output from the connection output synthesizer unit 84 is also supplied to the LINE terminal 95. In this example, a path (hereinafter referred to as "LINE path") of a sound signal from the connection output synthesizer unit 84 to the LINE terminal 95 does not include a switch of the output switching unit 85. That is, the connection sound signal to the LINE terminal is always supplied.

[0063] The amplified output unit 86 includes amplifier units 861, 862, and 863. Amplifier unit 861 is provided on the speaker path. Amplifier unit 862 is provided on the headphone path. Amplifier unit 863 is provided on the LINE path. Amplifier units 861, 862, and 863 are set to a predetermined gain. The setting of this gain can be changed by operating a volume control or the like of the operation unit 21.

[0064] The above configuration causes the sound source 80 to output the speaker sound signal through the speaker 60 and output the terminal sound signal, which contains more components of a touch sound signal than the speaker sound signal, through the headphone jack 91 and the LINE jack 95. A sound output from the speaker 60 is combined with a touch sound mechanically generated from the key array and heard by the player. Therefore, even if the output from the speaker 60 contains few or no components of a touch sound signal, the player can hear a keyboard touch sound.

[0065] On the other hand, when using the headphone jack 91, the player hardly hears a mechanically generated attack sound. Since a sound output from the headphone jack 91 contains many components of an attack sound signal, the above-mentioned sound source 80 allows the player to hear an attack sound generated by the sound source 80 instead of a mechanical attack sound. <Zweite Ausführungsform>

[0066] In the first embodiment, in a case where a sound output from the speaker 60 does not include an attack sound signal, that is, in a case where the first sound volume ratio is 0, the amplification factor of the amplifier unit 842 is achieved by setting it to 0. In a second embodiment, this is achieved by a different configuration.

[0067] Fig. 10 is a block diagram showing a functional configuration of a sound source according to the second embodiment of the present invention. Compared with the sound source 80 according to the first embodiment, a sound source 80A according to the second embodiment does not include the speaker output synthesizer unit 83. Accordingly, a string striking sound signal is output from the string striking sound signal output unit 81 (string striking sound signal generation unit 813) to the output switching unit 85 (switch 851) and the terminal output synthesizer unit 84 (amplifier unit 841). On the other hand, a striking sound signal is output from a striking sound signal output unit 82A (strike sound signal generation unit 823A) to the terminal output synthesizer unit 84 (amplifier unit 842) because the speaker output synthesizer unit 83 is not provided. The other components are the same as those of the first embodiment.It should be noted that a relationship between the amplification factors of the amplifier units 841 and 842 only needs to be determined in advance. <Dritte Ausführungsform>

[0068] Another sound can be added to the sound output from the speaker 60 according to the first embodiment. In a third embodiment, an example will be described in which a reverberation sound signal (fifth sound signal) corresponding to the reverberation at the time of transmission of a keyboard strike sound to the resonant frame or that of a grand piano is added.

[0069] Fig.11 is a block diagram showing a functional configuration of a sound source according to the third embodiment of the present invention. Compared with the sound source 80 according to the first embodiment, a sound source 80B according to the third embodiment further includes a reverberation sound signal output unit 88. The reverberation sound signal output unit 88 outputs a reverberation sound signal through a process similar to that by which the attack sound signal output unit 82 outputs an attack sound signal. In this case, the generation timing of the reverberation sound signal corresponds to a reverberation component of the attack sound and is therefore later in time than the generation timing of the attack sound signal. This delay time only needs to be set in advance. A synthesizer unit 835B of a speaker output synthesizer unit 83B combines a string attack sound signal, an attack sound signal, and a reverberation sound signal.Such a configuration causes a speaker sound signal to be a signal that includes a reverberation sound signal as well as a string striking sound signal and a striking sound signal.

[0070] As mentioned above, a sound output from the speaker 60 is combined with a touch sound mechanically generated from the key array and heard by the player. The electronic musical keyboard instrument 1 does not include a large structure such as a resonant frame compared to an acoustic piano. Therefore, a touch sound mechanically generated in the electronic musical keyboard instrument 1 may contain fewer reverberation components than a touch sound of an acoustic piano. In this example, a reverberation sound signal represents a sound corresponding to such a reverberation component. Accordingly, a reverberation component of a touch sound of an acoustic piano can be amplified by a sound (speaker sound signal) output from the speaker 60.Since a follow-up sound signal contains additional components of an attack sound signal, the attack sound signal itself may contain a reverberation component.

[0071] Since a striking sound signal also includes a reverberation component, control may be performed such that the larger the amplification factor 831 is set, the smaller the sound volume of a reverberation sound signal output from the reverberation sound signal output unit 88. In a case where the first sound volume ratio is 0, a configuration in which the amplification unit 832 is not used may be established, or the second embodiment may be provided with a synthesizer unit that combines a string striking sound signal and a reverberation sound signal by addition. <abwandlungen>

[0072] Embodiments of the present invention have been described above. However, the embodiments may use embodiments that are combined or replaced with each other. Furthermore, the embodiments of the present invention may be modified into various forms as follows. The modifications to be described below may also be applied in combination with each other. (1) In each of the above embodiments, the sound volume ratio between a string striking sound signal and a striking sound signal in a connection sound signal supplied to the headphone terminal 91 and the sound volume ratio between a string striking sound signal and a striking sound signal in a connection sound signal supplied to the LINE terminal 95 is the same. Alternatively, these sound volume ratios may be different from each other. (2) In each of the above embodiments, the electronic musical keyboard instrument 1 has been described as an example of an electronic musical instrument. Alternatively, the electronic musical instrument need not be a keyboard instrument, but only a musical instrument with a performance operator. That is, the electronic musical instrument may be configured to include a performance operator other than the keys 70. The sound source according to any one of the above statements can be applied to an electronic musical instrument in the form of an acoustic musical instrument in which a striking sound is generated by the operation of a performance operator. One possible example of a striking sound generated in a woodwind instrument is the sound of a lid being opened and closed by a key operation.In a case where such a woodwind instrument takes the form of an electronic musical instrument, it is effective to have a structure in which a striking sound is generated by an operation on a performance operator, and then the sound source according to any one of the aforementioned embodiments is applied. (3) In each of the above embodiments, the supply of a sound signal to the speaker 60 or the headphone jack 91 is achieved through switching paths by means of the output switching unit 85. Alternatively, this can be achieved by adjusting the amplification factors of the amplifier units 861 and 862 and limiting the output to one of the two amplifiers. (4) In each of the aforementioned embodiments, the attack sound waveform memory 821 contains common waveform data therein, regardless of the key number. Alternatively, as with the waveform data stored in the string attack sound waveform memory 811, different shape data may be stored with respect to one key number, and the same waveform data may be assigned to at least two key numbers (ie, a key number representing a first pitch and a key number representing a second pitch). (5) In each of the above embodiments, the electronic musical keyboard instrument 1 includes the speaker 60. Alternatively, the electronic musical keyboard instrument 1 may include a terminal through which an acoustic signal is supplied to the speaker instead of the speaker 60. In this case, only a speaker sound signal needs to be supplied to this terminal. (6) In each of the above embodiments, a string striking sound signal and a striking sound signal are generated at different times. Alternatively, these signals may be generated simultaneously. (7) In each of the above embodiments, even a change in the key number note by a predetermined pitch difference does not result in a change in the pitch of a striking sound signal. Alternatively, this pitch may change. In this case, the pitch of a striking sound signal may change in a similar manner to the pitch of a string striking sound signal, or may change by a smaller pitch difference than a string striking sound signal. In a case where the key number note has changed by a predetermined pitch difference, the pitch of a string striking sound signal and the pitch of a striking sound signal need only differ from each other in the amount of change. (8) In each of the above embodiments, the sound source generates and combines a string-strike sound signal and a strike sound signal. Alternatively, such a combination is not limited as long as two types of sound signals are generated and combined. List of reference symbols

[0073] 1 ...electronic musical keyboard instrument, 10...control unit, 21...operation unit, 23...display unit, 30...memory unit, 50...case, 58...keyboard bottom, 60...speaker, 75...key response measuring unit, 75-1...first sensor, 75-2...second sensor, 75-3...third sensor, 76...hammer, 78...frame, 80...sound source, 81...string striking sound signal output unit, 82...strike sound signal output unit, 83...speaker output synthesizer unit, 84...terminal output synthesizer unit, 85...output switching unit, 86...amplified output unit, 89...connection detection circuit, 91...headphone jack, 95...LINE jack, 706...hammer connecting part, 707...coupling part, 761...key connecting part, 765...spindle, 768...weight, 781...key support element, 782...spindle, 785...hammer support element, 791...lower limit stopper, 792...upper limit stopper, 811...string striking sound waveform memory, 813...String striking sound signal generation unit, 815...string striking sound volume table, 817...string striking sound delay table, 821...strike sound waveform memory, 823...strike sound signal generation unit, 825...strike sound volume table, 827...strike sound delay table, 831, 832...amplifier unit, 841, 842...amplifier unit, 851, 852...switch, 861, 862, 863...amplifier unit.< / abwandlungen>

Claims

[1] Electronic musical instrument (1), comprising: a sound source (80) that generates, in accordance with an instruction signal for instructing to generate a sound, a first sound signal corresponding to a string striking sound and a second sound signal corresponding to a keyboard bottom striking sound; a first output unit that outputs a third sound signal including the first sound signal and the second sound signal at a first sound volume ratio; and a second output unit that outputs a fourth sound signal including the first sound signal and the second sound signal at a second sound volume ratio different from the first sound volume ratio. [2] An electronic musical instrument (1) according to claim 1, wherein the instruction signal includes pitch information for indicating a pitch of a sound to be generated, in a case where the pitch information has changed from a first pitch to a second pitch different from the first pitch, the sound source causes a pitch change of the first sound signal in accordance with a pitch difference between the first pitch and the second pitch, but does not cause a pitch change of the second sound signal or causes a pitch change of the second sound signal by a pitch difference smaller than the pitch change of the first sound signal, and a ratio of the second sound signal to the first sound signal at the second sound volume ratio is greater than a ratio of the second sound signal to the first sound signal at the first sound volume ratio. [3] Electronic musical instrument (1) according to claim 1 or 2, further comprising a performance operator for generating the instruction signal, wherein the instruction signal contains operation information that changes according to an operation content of the game operator, in response to the instruction to generate a sound, the sound source (80) changes a relative relationship between a time of generation of the first sound signal and a time of generation of the second sound signal in accordance with the operating information, and a ratio of the second sound signal to the first sound signal at the second sound volume ratio is greater than a ratio of the second sound signal to the first sound signal at the first sound volume ratio. [4] Electronic musical instrument (1) according to one of claims 1 to 3, wherein a ratio of the second sound signal to the first sound signal at the first sound volume ratio is 0. [5] Electronic musical instrument (1), comprising: a sound source (80) that generates, in accordance with an instruction signal for instructing to generate a sound, a first sound signal corresponding to a string striking sound and a second sound signal corresponding to a keyboard bottom striking sound; a first output unit that outputs a third sound signal that includes the first sound signal and does not include the second sound signal; and a second output unit that outputs a fourth sound signal containing the first sound signal and the second sound signal. [6] The electronic musical instrument (1) according to claim 5, wherein the instruction signal includes pitch information for indicating a pitch of a sound to be generated, and in a case where the pitch information has changed from a first pitch to a second pitch different from the first pitch, the sound source causes a pitch change of the first sound signal in accordance with a pitch difference between the first pitch and the second pitch, but does not cause a pitch change of the second sound signal, or causes a pitch change of the second sound signal by a pitch difference smaller than the pitch change of the first sound signal. [7] Electronic musical instrument (1) according to claim 5 or 6, further comprising a performance operator for generating the instruction signal, wherein the instruction signal contains operation information that changes according to an operation content of the game operator, and in response to the instruction to generate a sound, the sound source (80) changes a relative relationship between a timing of generation of the first sound signal and a timing of generation of the second sound signal in accordance with the operation information. [8] Electronic musical instrument (1) according to one of claims 1 to 7, wherein the first output unit is a loudspeaker (60) which outputs the third sound signal as sound, and the second output unit is an output terminal through which the fourth sound signal is output to an external device. [9] The electronic musical instrument (1) according to claim 8, wherein in a case where the external device is connected to the output terminal, the third sound signal output from the speaker (60) is restricted. [10] The electronic musical instrument (1) according to claim 8 or 9, wherein in a case where the external device is not connected to the output terminal, the fourth sound signal output from the output terminal is restricted. [11] Electronic musical instrument (1) according to one of claims 1 to 10, further comprising: a game operator for generating the instruction signal, and a first element for being struck by the performance operator or by a second element connected to the performance operator to generate the keyboard bottom striking sound in response to an operation on the performance operator. [12] The electronic musical instrument (1) according to claim 11, wherein the performance operator includes a key (70), and the first member is a keyboard bottom (58) or a member connected to the keyboard bottom (58). [13] Electronic musical instrument (1) according to one of claims 1 to 12, wherein the sound source (80) further generates a fifth sound signal, the third sound signal output by the first output unit further contains the fifth sound signal and a time of generation of the fifth sound signal occurs after a time of generation of the second sound signal. [14] Electronic musical instrument (1), comprising: a game operator for generating an instruction signal for instructing to produce a sound, a first element for being struck by the playing operator or by a second element connected to the playing operator to produce a striking sound in response to an operation on the playing operator, a sound source (80) which, in accordance with the instruction signal, generates a first sound signal which does not correspond to the attack sound and a second sound signal which corresponds to the attack sound; a first output unit that outputs a third sound signal including the first sound signal and the second sound signal at a first sound volume ratio; and a second output unit that outputs a fourth sound signal including the first sound signal and the second sound signal at a second sound volume ratio different from the first sound volume ratio.

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