Sound reproduction device and program for sound reproduction device

Abstract

To provide a sound reproduction device and a sound reproduction program that suppress deterioration in sound quality accompanying changes in the rotation rate of a cooling fan, or suppresses changes in sound quality accompanying changes in the rotation rate of the cooling fan.SOLUTION: In a karaoke system, a karaoke device 2 which is a sound reproduction device includes: a cooling fan 21b; a microcomputer 21a which is a fan control unit that controls the rotation speed of the cooling fan; a first SoC 20a which is a parameter setting unit that sets parameters on the basis of the rotation speed of the cooling fan; and sound processing units 261a to 261d which process sound signals on the basis of the set parameters and output the audio signals.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an acoustic playback device that outputs an acoustic signal and an acoustic playback program.

Background Art

[0002] In various acoustic playback devices such as karaoke devices, an air-cooling fan may be provided to appropriately maintain the temperature inside the device housing. By rotating the air-cooling fan, the air outside the housing is taken in, the temperature inside the housing is appropriately maintained, and it is possible to prevent the acoustic playback device from malfunctioning due to heat and to operate it appropriately.

[0003] Patent Document 1 discloses that in a karaoke device, which is a type of acoustic playback device, a cooling fan is provided to appropriately maintain the temperature inside the karaoke device. In particular, in Patent Document 1, by controlling the drive of the cooling fan in accordance with the output volume of the karaoke device, power saving and low noise of the power consumption of the cooling fan are achieved. Also, during no-playback, by stopping the cooling fan, it is possible to suppress the driving noise.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Thus, in an acoustic playback device aimed at listening to good sound, noise from the cooling fan has been regarded as one factor that hinders the listening of sound. Here, the inventor of the present application has confirmed a phenomenon in which, in an acoustic playback device, a change occurs in the sound quality of the sound output by the acoustic playback device according to the rotation amount of the cooling fan. It is considered that in this phenomenon, in the acoustic playback device, a circuit that controls the driving of the cooling fan affects the electrical characteristics of the circuit that reproduces sound. Although it is considered possible to suppress the influence on the output sound based on the driving of the cooling fan by separating the two circuits, it is not practical to separate the two circuits.

[0006] The present invention is made in view of such a situation, and one of its purposes is to improve the sound quality of the output acoustic signal without depending on the rotation amount of the cooling fan.

Means for Solving the Problem

[0007] Therefore, the acoustic playback device according to the present invention adopts the following configuration. A cooling fan, A fan control unit that controls the rotation amount of the cooling fan, A parameter setting unit that sets parameters based on the rotation amount of the cooling fan, An acoustic processing unit that processes an acoustic signal based on the set parameters and outputs the acoustic signal, and is provided with.

[0008] Furthermore, the acoustic playback device according to the present invention, Is provided with a detection unit that detects the temperature inside the device, The fan control unit controls the rotation amount of the cooling fan according to the temperature detected by the detection unit.

[0009] Furthermore, in the acoustic playback device according to the present invention, When the rotation amount of the cooling fan is large, the parameter setting unit sets a parameter that increases the output of the low-frequency component of the acoustic signal.

[0010] Furthermore, in the acoustic playback device according to the present invention, The audio playback device is a device that plays music, and The parameter setting unit changes parameters between music pieces.

[0011] Furthermore, in the audio playback device according to the present invention, The audio playback device is a karaoke device that plays music, and The parameter setting unit changes parameters during sections where singing does not occur during music playback.

[0012] Furthermore, in the audio playback device according to the present invention, The parameter setting unit changes parameters either between music pieces or during sections where singing does not occur during music playback.

[0013] Furthermore, in the audio playback device according to the present invention, The audio playback device outputs a plurality of channels of audio signals, The audio signal processing unit performs processing based on parameters set for a predetermined audio signal among the plurality of channels of audio signals.

[0014] Furthermore, in the audio playback device according to the present invention, The audio playback device is a karaoke device, and The predetermined audio signal is either a performance sound or a singing sound.

[0015] Also, the audio playback program according to the present invention A cooling fan, A fan control unit that controls the rotation amount of the cooling fan, and is an audio playback program executed by an audio playback device provided with the same, A parameter setting process for setting parameters based on the rotation amount of the cooling fan, and An audio signal process for processing an audio signal based on the set parameters, are executed Audio playback program.

Advantages of the Invention

[0016] According to the audio playback device and the audio playback program of the present invention, it is possible to suppress deterioration of sound quality associated with a change in the rotation amount of the cooling fan, or to suppress a change in sound quality associated with a change in the rotation amount of the cooling fan. Therefore, it is possible to make the sound quality of the output audio signal appropriate without depending on the rotation amount of the cooling fan.

Brief Description of Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0018] FIG. 1 is a diagram showing the configuration of the karaoke system of the present embodiment. The karaoke system in the present embodiment includes a karaoke device 2 (sometimes also referred to as a commander) and a remote control device 1. Note that, in the present embodiment, the karaoke device 2, which is one of the audio playback devices, is described as an example, but the present invention is not limited to the karaoke device 2 and can be applied to various audio playback devices.

[0019] In this embodiment, the karaoke device 2 and the remote control device 1 are communicatively connected to the LAN 100 by wire or wirelessly to form a network. The karaoke device 2 includes an acoustic control unit 26. The acoustic control unit 26 of this embodiment is configured to include acoustic processing units 261a - 261d and an adder 262.

[0020] The acoustic processing units 261a - 261d are means for imparting predetermined acoustic characteristics to a plurality of input acoustic signals according to the set parameters. In this embodiment, acoustic processing units 261a - 261d for imparting effects to the acoustic signals input from the first SoC 20a, microphones 43a, 43b, and external musical instrument 43c are provided. The adder 262 adds the acoustic signals output from the acoustic processing units 261a - 261d and outputs them to the speaker 42. In FIG. 1, for the sake of convenience, the speaker 42 is shown as one, but it is possible to adopt various forms such as having a plurality of speakers 42 for stereo output or surround output.

[0021] The karaoke device 2 includes two control units (the first SoC 20a and the second SoC 20b) as a control configuration. An SoC (System on a Chip) is a chip also called a one - chip computer, which is a chip integrating functions such as a CPU, memory, video chip, and I / O (Input / Output) that are the central parts of a computer. Note that as a control configuration, not only such an SoC can be used, but also components such as a CPU, memory, and video chip, which are functions of the SoC, can be prepared.

[0022] The first SoC 20a (the first control unit) mainly undertakes functions related to the reproduction of music. The performance sound reproduced by the first SoC 20a is output to the acoustic control unit 26. The video formed by the first SoC 20a is displayed on the monitor 41 via the switcher 28. In this embodiment, the switcher 28 is configured to input the videos of the first SoC 20a and the second SoC 20b and display either one on the monitor 41, but it may also be configured to synthesize both and display them on the monitor 41.

[0023] The second SoC 20b (second control unit) is a control unit mainly responsible for various applications (application programs) executed in the karaoke device 2, external communication with the Internet, etc. Examples of applications executed in the karaoke device 2 include games, video viewing, and web conferencing applications. Similar to the first SoC 20a, the second SoC 20b can perform audio output and video output. The audio formed by the second SoC 20b is output to the audio control unit 26, and the video is displayed and output to the monitor 41 via the switch 28. Also, the hard disk 29 is mounted on the second SoC 20b, and its read / write control is performed. The first SoC 20a and the second SoC 20b are communicably connected via the interface 27.

[0024] Various peripheral components are connected to the interface 27 that connects the first SoC 20a and the second SoC 20b as control units, and they can be controlled by the control units. In this embodiment, as peripheral components, various communication units 24a - 24c, the operation unit 23, the LED 22, the cooling fan 21b, and the detection unit 25 are connected. As the communication units 24a - 24c, a LAN communication unit 24a, a wireless LAN communication unit 24b, and an infrared communication unit 24c are provided.

[0025] The karaoke device 2 can communicate with various devices communicably connected to the LAN 100 using the LAN communication unit 24a or the wireless LAN communication unit 24b. In this embodiment, the karaoke device 2 is configured to communicate with the remote control device 1 pre-associated with it via the LAN 100. The infrared communication unit 24c is a means for receiving infrared signals from the remote control device 1. The karaoke device 2 can communicate with the remote control device 1 using this infrared communication unit 24c in situations where communication via the LAN 100 is not possible.

[0026] The LED 22 functions as a status display unit that displays various states of the karaoke device 2. The operation unit 23 is composed of switches, a touch panel, etc., and accepts various operations from the user. The cooling fan 21b is provided in the housing of the karaoke device 2 and is a means for cooling the inside of the housing by taking in outside air. A plurality of cooling fans 21b may be provided. In that case, the plurality of cooling fans 21b may be attached to, for example, the first SoC 20a and the second SoC 20b, and it is conceivable to directly cool them.

[0027] The cooling fan 21b is connected to the interface 27 via the microcomputer 21a as a fan control unit. In the present embodiment, the rotation amount thereof is controlled by the first SoC 20a as a control unit. In the present embodiment, PWM (Pulse Width Modulation) control is used for the rotation control of the cooling fan 21b, and the duty ratio [%] is used as the rotation amount. The higher the duty ratio, the greater the rotation amount of the cooling fan 21b. As the rotation amount, various forms such as using the rotation speed [rmp] of the cooling fan 21b can be adopted.

[0028] The detection unit 25 is a sensor that detects the temperature inside the housing of the karaoke device 2. In the present embodiment, based on the temperature detected by the detection unit 25, the temperature state (temperature status) inside the housing is determined, and the rotation amount of the cooling fan 21b is controlled. The detection unit 25 may be arranged at various locations inside the housing of the karaoke device 2, and the temperature status may be determined based on a plurality of temperatures detected at various locations.

[0029] With such a configuration, the karaoke device 2 executes various processes. As the main functions of the karaoke device 2, it is possible to execute a music reservation process, a music playback process for playing music, and the like. The music reservation process is a process for designating and reserving a music based on a designation from a user, and is executed in cooperation with the remote control device 1. The reservation information formed in the music selection process of the remote control device 1 is transmitted to the karaoke device 2. The karaoke device 2 registers the received reservation information in a reservation table that stores and manages it in the memory in the first SoC 20a. The karaoke device 2 executes a music playback process based on the reservation table.

[0030] The music playback process is a process executed by the first SoC 20a, and is configured to include a performance process, a lyrics display process, and a video playback process. The performance process is a process of executing a performance based on performance data (such as MIDI data, audio data, and model data) included in music data. The performance sound played by the first SoC 20a is mixed by the addition unit 262 via the sound processing unit 261a of the acoustic control unit 26 and emitted from the speaker 42. The lyrics display process is a process of assisting singing by displaying a lyrics video (teletext) based on the lyrics data included in the music data on the monitor 41. By superimposing the background video played in the video playback process on the lyrics video displayed in this lyrics display process, the atmosphere of singing is improved.

[0031] On the other hand, the remote control device 1 can execute a music selection process of searching for a music based on an instruction from the user and transmitting reservation information to the karaoke device 2 for the music for which a playback instruction has been given. The remote control device 1 can receive various information from the karaoke device 2 or the server device 5 connected to the Internet and execute various processes. In the present embodiment, as a user interface for receiving various instructions from the user, an operation unit 17 and a touch panel monitor 11 are provided. The touch panel monitor 11 is configured to have a display unit 11a and a touch panel 11b, and can display various information on the display unit 11a and receive touch input from the user.

[0032] Furthermore, the remote control device 1 includes a memory 14 as a storage unit for storing a database, various programs, and various information generated during program execution, which are required for the music selection process, and a remote control side control unit for overall control of these configurations. The remote control side control unit includes a CPU 15, a video control unit 13 for forming a video to be displayed on the touch panel monitor 11, a video RAM 12 for temporarily storing video data of the video to be displayed, and an operation processing unit 18 for interpreting an input from the touch panel monitor 11 or the operation unit 17 and transmitting it to the CPU 15.

[0033] The remote control device 1 is wirelessly connected to the access point 130 by the wireless LAN communication unit 16, and thus is connected to the network constituted by the LAN 100. Each remote control device 1 is pre-associated with a specific karaoke device 2, and various commands output from the remote control device 1 will be received by the associated karaoke device 2.

[0034] With such a configuration of the remote control device 1, various inputs from the user are received from the touch panel monitor 11 or the operation unit 17, and various information is provided by the display of the touch panel monitor 11, so that various processes such as a music selection process for transmitting reservation information output to the karaoke device 2 can be performed.

[0035] FIG. 2 is a flowchart showing the music reproduction process executed by the karaoke device 2. The karaoke device 2 reserves a music based on an operation on an input unit such as the remote control device 1 or the touch panel monitor 33. When a music is reserved, reservation information including a music ID for identifying music data and a user ID of the reserved user is registered in a reservation table stored and managed by the first SoC 20a.

[0036] In the music reproduction process, the reservation table is checked (S101). If there is a music to be reproduced next (S102: Yes), music reproduction based on the music data is executed (S103). In music reproduction, the performance process, the lyrics display process, and the video reproduction process are executed synchronously. When the music reproduction ends (S104: Yes), in order to confirm the presence of the next music to be reproduced, the reservation table is checked (S101). Thus, the karaoke device 2 of the present embodiment can enjoy karaoke by reproducing the corresponding music data for the music reserved by the user.

[0037] Next, the relationship between the temperature inside the housing of the karaoke device 2 and the temperature status will be described. FIG. 3 is a diagram showing the relationship between the temperature and the temperature status according to the present embodiment. In the present embodiment, based on the temperature detected by the detection unit 25, the temperature status of the karaoke device 2 is determined. In the present embodiment, the temperature status is defined at five levels (safe, normal, warning, abnormal, dangerous). The determination of the temperature status is executed by the first SoC 20a as a control unit. The temperature status of the present embodiment takes different paths when the temperature rises and when the temperature drops.

[0038] In FIG. 3, the arrows indicate the paths when the temperature rises and when the temperature drops. For example, when the temperature reaches 55 [°C] during temperature rise, the temperature status is changed from "safe" to "normal". On the other hand, when the temperature becomes 50 [°C] during temperature drop, the temperature status is changed from "normal" to "safe". In the present embodiment, the temperature status is determined based on the temperature detected by one detection unit 25. Not only in such a form, but also a plurality of detection units 25 may be provided, and the temperature status may be determined based on the temperatures detected by the plurality of detection units 25.

[0039] In the present embodiment, based on the determined temperature status, the rotation amount of the cooling fan 21b and the parameters used in the acoustic processing units 261a - 261d are determined. FIG. 4 is a table showing the rotation amount and parameters for the temperature status according to the present embodiment. In the present embodiment, when the temperature status is normal or lower (safe or normal), the rotation amount of the cooling fan 21b is set to 65 [%]. Also, when the temperature status is warning or higher (any of warning, abnormal, dangerous), the rotation amount of the cooling fan 21b is set to 100 [%]. By controlling the rotation amount of the cooling fan 21b according to the temperature status in this way, the inside of the housing of the karaoke device 2 is set to an appropriate temperature, and the karaoke device 2 is made to operate appropriately.

[0040] Here, the inventor of the present application newly confirmed a phenomenon in the karaoke device 2 that the sound quality of the sound output by the karaoke device 2 changes according to the rotation amount of the cooling fan 21b. This phenomenon is presumably due to the fact that the microcomputer 21a that controls the driving of the cooling fan 21b in the karaoke device 2 affects the electrical characteristics of the circuit that reproduces sound. The change in sound quality in the karaoke device 2 may cause discomfort to the singing user or the listening user. Therefore, in the present embodiment, by changing the parameters set in the acoustic processing units 261a - 261d according to the rotation amount of the cooling fan 21b, it is intended to suppress the change in sound quality. As shown in FIG. 4, when the temperature status is "normal" or lower, the first parameter is set, and when it is "warning" or higher, the second parameter is set.

[0041] FIG. 5 is a diagram showing the frequency characteristics of the parameters according to the present embodiment. FIG. 5(A) shows the frequency characteristics of the first parameter used when the temperature status is "normal" or lower, and FIG. 5(B) shows the frequency characteristics of the second parameter used when the temperature status is "warning" or higher. The frequency characteristics show the frequency [Hz] on the horizontal axis in a logarithmic scale and the gain [dB] on the vertical axis.

[0042] The frequency characteristics of the first parameter shown in FIG. 5(A) are substantially flat in the audible range (20 Hz to 20 kHz). The frequency characteristics of the second parameter shown in FIG. 5(B) have an increased gain of the low-frequency component (output) compared to the first parameter. The second parameter of the present embodiment has an increased gain with a peak at around 200 [Hz], which is a predetermined frequency. This is for the purpose of compensating for the decrease in the low-frequency component output due to an increase in the rotation amount of the cooling fan 21b. By setting such a second parameter in the acoustic processing units 261a - 261d, it becomes possible to compensate for the decrease in the low-frequency component accompanying the increase in the rotation amount of the cooling fan 21b. Therefore, it becomes possible to suppress the fluctuation of the frequency characteristics of the sound output from the speaker 42.

[0043] FIG. 6 is a flowchart showing the parameter setting process according to the present embodiment. The parameter setting process is a process executed when the karaoke device 2 is driven, and is a process of setting the rotation amount of the cooling fan 21b and the parameters set in the acoustic processing units 261a - 261d based on the temperature detected by the detection unit 25. In the parameter setting process, first, the temperature status is determined based on the temperature detected by the detection unit 25 (S101). The temperature status in the present embodiment is determined at five levels as described with reference to FIG. 3. When the temperature status is "safe" or "normal" (S102: Yes), the rotation amount of the cooling fan 21b is set such that its duty ratio is 65 [%] (S109). Also, the first parameter is set for the acoustic processing units 261a - 261d (S110).

[0044] On the other hand, when the temperature status is not "safe" or "normal" (S102: No), the rotation amount of the cooling fan 21b is set such that its duty ratio becomes 100 [%] (S103). Also, the second parameter is set for the acoustic processing units 261a - 261d (S104). Thus, when the rotation amount of the cooling fan 21b increases, by using the second parameter described with reference to FIG. 5(B), it is possible to compensate for the output reduction of the low-frequency component and maintain the same sound quality as when the rotation amount of the cooling fan 21b is small.

[0045] After the duty ratio is set to 100[%] and the second parameter is set, the first SoC 20a as the control unit continuously determines the temperature status (S105). Then, when the temperature status returns to "safe" or "normal" (S106: Yes), the rotation amount of the cooling fan 21b is set so that the duty ratio becomes 65[%] (S103), and the first parameter is set (S110). In this embodiment, in order to suppress the change in sound quality during music playback, during the period other than during music playback (between songs), the rotation amount (duty ratio) of the cooling fan 21b is changed, and the first parameter is changed. If it is during music playback (S107: Yes), it waits until the music playback ends (S108), and then executes the change in the rotation amount (S109) and the setting of the second parameter (S110).

[0046] As described above, according to the parameter setting process of this embodiment, by controlling the rotation amount of the cooling fan 21b according to the temperature detected by the detection unit 25, it is possible to appropriately maintain the temperature inside the casing of the karaoke device 2. Furthermore, by changing from the first parameter to the second parameter as the rotation amount of the cooling fan 21b increases, it is possible to suppress the change in sound quality output from the speaker 42.

[0047] The present invention is not limited to the above embodiment, and various modifications can be adopted. Hereinafter, various modifications will be described.

[0048] [First Modification Example] In the above-described embodiment, the temperature status was divided into two situations: "normal" or lower and "warning" or higher, and the rotation amount of the cooling fan 21b was changed and the parameter was changed. Not only in such a form, but the temperature status situation can be further divided in more detail, and the rotation amount of the cooling fan 21b can be changed and the parameter can be controlled for each situation.

[0049] FIG. 7 is a table showing the rotation amount and parameters for temperature status according to another embodiment. In the first modification, the temperature status is divided into four situations, and for each situation, the rotation amount of the cooling fan 21b is changed and the parameters are changed. When the temperature status is "safe", the rotation amount of the cooling fan 21b has its duty ratio set to 65 [%], and the parameter is set to the first parameter. The first parameter has the frequency characteristics described in FIG. 5(A). When the temperature status is "normal", the rotation amount of the cooling fan 21b has its duty ratio set to 75 [%], and the parameter is set to the second A parameter. When the temperature status is "warning", the rotation amount of the cooling fan 21b has its duty ratio set to 85 [%], and the parameter is set to the second B parameter. When the temperature status is "abnormal" or higher, the rotation amount of the cooling fan 21b has its duty ratio set to 100 [%], and the parameter is set to the second C parameter.

[0050] FIG. 8 is a diagram showing the frequency characteristics of the second parameter according to another embodiment. In FIG. 8, reference numeral 2A indicates the frequency characteristics of the second A parameter, reference numeral 2B indicates the frequency characteristics of the second B parameter, and reference numeral 2C indicates the frequency characteristics of the second C parameter. As can be seen from these frequency characteristics, the gain of the low-frequency component increases in the order of the second A, second B, and second C parameters. Also, each of the second A, second B, and second C parameters has a characteristic of having a peak near a predetermined frequency (200 [Hz]). In this way, as the rotation amount of the cooling fan 21b increases, by increasing the gain (output) of the low-frequency component, it becomes possible to more finely control the acoustic characteristics and suppress the change in sound quality due to the rotation of the cooling fan 21b.

[0051] [Second Modification Example] In the parameter setting process of the foregoing embodiment, when the temperature status returns to "safe" or "normal", during the intervals between music pieces of music playback, the rotation amount of the cooling fan 21b and parameter changes were to be performed. In the karaoke device 2, singing is the main purpose. Therefore, the rotation amount of the cooling fan 21b and parameter changes may be performed not during the intervals between music pieces of music playback but during sections where singing does not occur.

[0052] Here, the sections where singing does not occur may be considered to be non-singing sections defined in the music data or sections where no singing voice is input to the microphones 43a and 43b. When defining a non-singing section in the music data, it is also possible to make a determination based on the lyric data. In this way, in the karaoke device 2, by performing the rotation amount of the cooling fan 21b and parameter changes during sections where singing does not occur, it becomes possible to suppress changes in sound quality during singing. Note that the rotation amount of the cooling fan 21b and parameter changes may be performed both during the intervals between music pieces of music playback and during sections where singing does not occur.

[0053] [Third Modified Example] In the foregoing embodiment, the acoustic processing units 261a - 261d provided in the acoustic control unit 26 were used to perform processing based on parameters on a plurality of systems of acoustic signals (performance sounds reproduced by the first SoC 20a, singing sounds input from the microphones 43a and 43b, performance sounds input from the external musical instrument 43c). Instead of providing the acoustic processing units 261a - 261d for each of the plurality of systems of acoustic signals in this way, for example, an acoustic processing unit may be provided on the output side of the adder 262.

[0054] Also, when providing the acoustic processing units 261a - 261d for each of the plurality of systems, the parameters set based on the rotation amount of the cooling fan 21b may be made different for each system. By setting parameters according to the acoustic characteristics of each system, it becomes possible to obtain a sound quality corresponding to each system.

[0055] Also, it is also possible to provide a system in which parameter setting based on the rotation amount of the cooling fan 21b is performed and a system in which it is not performed. For example, the performance sound output from the first SoC 20a and the singing sounds input from the microphones 43a and 43b are considered to be important in terms of sound quality in karaoke. Therefore, it is preferable that parameter setting based on the rotation amount of the cooling fan 21b is performed for at least one of the performance sound and the singing sound. Also, for the performance sound input from the external musical instrument 43c, it is also possible not to perform parameter setting based on the rotation amount of the cooling fan 21b. Also, for sound effects such as scoring, it is also possible not to perform parameter setting based on the rotation amount of the cooling fan 21b.

[0056] [Fourth Modification Example] In the above-described embodiment, the rotation amount of the cooling fan 21b has been controlled based on the temperature detected by the detection unit 25. The rotation amount control of the cooling fan 21b is not limited to being based on the temperature detected by the detection unit 25 in this way. For example, it is also possible to change the rotation amount of the cooling fan 21b according to the type of processing executed in the karaoke device 2, or the number of processes, or the processing load of the first SoC 20a and the second SoC 20b as the control unit.

[0057] [Fifth Modification Example] In the above-described embodiment, the cooling method using the cooling fan 21b has not been described in detail, but the cooling method using the cooling fan 21b can employ various methods such as an air-cooling method or a water-cooling method.

[0058] As described above, various embodiments have been described by taking the karaoke device 2 as an example, but the present invention can be applied not only to the karaoke device 2 but also to various audio reproduction devices. Also, an audio reproduction program executed in various information processing devices such as a personal computer and a game device also belongs to the scope of the invention. [Description of Reference Numerals]

[0059] 1: Remote control device 23: Operation unit 2: Karaoke device 24a: LAN communication section 5: Server device 24b: Wireless LAN communication section 11: Touch panel monitor 24c: Infrared communication section 11a: Display section 25: Detection section 11b: Touch panel 26: Audio control section 12: Video RAM 27: Interface 13: Video control section 28: Switch 14: Memory 29: Hard disk 15: CPU 33: Touch panel monitor 16: Wireless LAN communication section 41: Monitor 17: Operation section 42: Speaker 18: Operation processing section 43a, 43b: Microphone 20a: First SoC 43c: External instrument 20b: Second SoC 130: Access point 21a: Microcontroller 261a: Audio processing section 21b: Cooling fan 261a - 261d: Audio processing section 22: LED 262: Addition section

Claims

1. A cooling fan, a fan control unit that controls the rotation speed of the cooling fan, a parameter setting unit that sets parameters based on the rotation speed of the cooling fan, and an acoustic signal processing unit that processes an acoustic signal based on the set parameters and outputs the acoustic signal. An acoustic playback device.

2. The acoustic playback device according to claim 1, further comprising a detection unit that detects the temperature inside the device, wherein the fan control unit controls the rotation speed of the cooling fan according to the temperature detected by the detection unit. The acoustic playback device according to claim 1.

3. The acoustic playback device according to claim 1, wherein the parameter setting unit sets parameters to increase the output of the low-frequency component of the acoustic signal when the rotation speed of the cooling fan is high. The acoustic playback device according to claim 1.

4. The acoustic playback device is a device that plays music, wherein the parameter setting unit changes the parameters between music pieces. The acoustic playback device according to claim 1.

5. The acoustic playback device is a karaoke device that plays music, wherein the parameter setting unit changes the parameters during sections of the music where singing does not occur. The acoustic playback device according to claim 1.

6. The acoustic playback device according to claim 4 or 5, wherein the parameter setting unit changes the parameters between music pieces or during sections of the music where singing does not occur. The acoustic playback device according to claim 4 or 5.

7. The acoustic playback device outputs a plurality of channels of acoustic signals, wherein the acoustic signal processing unit performs processing based on the parameters set for a predetermined acoustic signal among the plurality of channels of acoustic signals. The acoustic playback device according to claim 1.

8. The acoustic playback device is a karaoke device, wherein the predetermined acoustic signal is either the performance sound or the singing sound. The acoustic playback device according to claim 7.

9. An acoustic playback program executed by an acoustic playback device including a cooling fan and a fan control unit that controls the rotation speed of the cooling fan, the program performing a parameter setting process that sets parameters based on the rotation speed of the cooling fan and an acoustic signal process that processes an acoustic signal based on the set parameters. An acoustic playback program. ​ ​

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