JP2007174275A - Acoustic reproduction controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic reproduction controller capable of causing an acoustic output apparatus to smoothly output a plurality of pieces of acoustic information without giving a user an uncomfortable feeling. <P>SOLUTION: The acoustic reproduction controller 1 includes a CPU 11 for making a loudspeaker 19 fade in acoustic information to be output next while making the loudspeaker fade out currently output acoustic information, wherein the CPU 11 acquires from a recording medium such as an acoustic database 10 tune information representing tune of the acoustic information to be output next from the loudspeaker 19 and fades in the acoustic information while spending a time corresponding to the acquired tune information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound reproduction control device that outputs sound information to a sound output device.

As a conventional sound reproduction control device, when a plurality of pieces of sound information are continuously output to the sound output device, the sound information output to the sound output device is faded out, and the tempo of the sound information faded out is used. There is one that causes a plurality of sound information to be smoothly output to the sound output device by fading in while adjusting the tempo of the next sound information so that it becomes the original tempo and outputting it to the sound output device (for example, Patent Documents) 1).
JP-A-9-230880

  However, since the conventional sound reproduction control device adjusts the tempo of the next sound information to be output to the sound output device, the user's image with respect to the music represented by this sound information is damaged, and the user feels uncomfortable. There was a problem of giving.

  The present invention has been made to solve the conventional problems, and provides a sound reproduction control device capable of smoothly outputting a plurality of sound information to a sound output device without causing discomfort to the user. With the goal.

  The sound reproduction control device of the present invention is a sound reproduction control device including a control unit that fades in sound information to be output next to the sound output device while fading out the sound information output to the sound output device. The control means is configured to acquire music tone information representing a music tone of the acoustic information to be output next to the sound output device from the recording medium, and to fade in the acoustic information over time according to the acquired music tone information. Has been.

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time according to the tune, so that the sound output device can be used without causing discomfort to the user. A plurality of acoustic information can be output smoothly.

  The music tone information includes information representing the tempo of the music represented by the corresponding acoustic information, and the control means fades in the acoustic information over a longer time as the tempo is slower. Also good.

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time according to the tempo, so that the sound output device can be used without causing discomfort to the user. A plurality of acoustic information can be output smoothly.

  The music tone information includes information indicating the average sound pressure of the music represented by the corresponding sound information, and the control means fades in the sound information over a longer time as the average sound pressure is lower. You may make it make it.

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time corresponding to the average sound pressure, so that the sound output without giving the user unpleasant feeling. The apparatus can smoothly output a plurality of acoustic information.

  The music tone information includes information indicating the music length of the music represented by the corresponding sound information, and the control means causes the sound information to fade in over a longer time as the music length is longer. It may be.

  With this configuration, the sound reproduction control device according to the present invention fades in the sound information to be output next to the sound output device over time corresponding to the length of the music, so that the sound is not discomforted to the user. A plurality of acoustic information can be smoothly output to the output device.

  The music tone information may include information representing the genre of the music represented by the corresponding acoustic information, and the control unit may fade in the acoustic information over time according to the genre. .

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time according to the genre, so that the sound output device can be used without causing discomfort to the user. A plurality of acoustic information can be output smoothly.

  Further, the control means acquires driving status information representing a driving status of a vehicle on which the sound reproduction control device is mounted from a storage medium, and then takes the time according to the acquired driving status information to the acoustic output device. The sound information to be output to may be faded in.

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time according to the driving situation, so that the sound output device does not give the user unpleasant feeling. Can output a plurality of acoustic information smoothly.

  Further, the driving status information includes information indicating the moving speed of the vehicle, and the control means outputs the sound information to be output next to the sound output device over a longer time as the moving speed is lower. You may make it fade in.

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time corresponding to the moving speed of the vehicle, so that the sound is not discomforted to the user. A plurality of acoustic information can be smoothly output to the output device.

  In addition, the driving status information includes information indicating a type of road on which the vehicle is traveling, and the control unit then outputs to the sound output device over time according to the type of the road. The sound information to be played may be faded in.

  With this configuration, the sound reproduction control device according to the present invention fades in the sound information to be output next to the sound output device over time according to the type of road on which the vehicle is traveling, which may cause discomfort to the user. The sound output device can smoothly output a plurality of pieces of sound information without giving the sound.

  The driving status information includes information representing a current time zone, and the control unit fades in the acoustic information to be output next to the sound output device over a time period corresponding to the time zone. You may do it.

  With this configuration, the sound reproduction control device of the present invention fades in the sound information to be output next to the sound output device over time according to the time zone, so that the sound output device does not give the user unpleasant feeling. Can output a plurality of acoustic information smoothly.

  Further, the control means may fade in the acoustic information selected according to the input by the user in a time shorter than the time for fading in the sequentially selected acoustic information.

  With this configuration, the sound reproduction control device according to the present invention fades in the sound information selected by the user's intention in a shorter time than the sequentially selected sound information, so that the sound output without causing discomfort to the user. The apparatus can smoothly output a plurality of acoustic information.

  The present invention can provide a sound reproduction control device having an effect that a plurality of pieces of sound information can be smoothly output to a sound output device without causing discomfort to the user.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
In the present embodiment, an example in which the sound reproduction control device according to the present invention is configured using a CPU (Central Processing Unit) will be described. FIG. 1 shows a sound reproduction control apparatus according to the first embodiment of the present invention.

  In FIG. 1, the sound reproduction control device 1 is a sound database 10 that stores sound information representing music and the like, a CPU 11, a timer 12, an input device 13 such as a push button, a touch panel, and a remote controller, and sound information. Decoders 14 and 15 that convert signals, level adjusters 16 and 17 that adjust the output level of the acoustic signal, a mixer 18 that mixes the acoustic signal, and a speaker 19 as an acoustic output device.

  The acoustic database 10 is configured by a non-volatile storage medium such as a hard disk provided in the acoustic reproduction control device 1. The acoustic database 10 may be constituted by a storage medium that can be attached to and detached from the acoustic reproduction control device 1 such as a CD (Compact Disc) or an MD (Mini Disc), or by an external server device connected via a network. It may be configured.

  The acoustic database 10 stores musical tone information representing the musical tone of each piece of acoustic information. This music tone information includes information representing the tempo, average sound pressure, music length, genre, etc. of the music represented by the corresponding acoustic information.

  Note that the tune information may be included in the sound information such as ID3 tag information conforming to the MP3 (MPEG-1 Audio Layer 3) standard, and is based on file management information such as TOC (Table of Contents) information. May be stored in the same or different medium or device as the acoustic information.

  Further, each value represented by the music tone information may be set on the acoustic information provider side, or may be set by the user via the input device 13, and is disclosed in, for example, JP-A-2002-116754. Further, it may be extracted from the acoustic information by causing the CPU 11 to function as a tempo extracting device. The tempo and average sound pressure represented by the tune information may be average values within a predetermined time from the music start position.

  The decoders 14 and 15 are configured by, for example, a DSP (Digital Signal Processor), and the level adjusters 16 and 17 are configured by, for example, an amplifier.

  The CPU 11 controls the decoders 14 and 15 and the level adjusters 16 and 17 by reading a program stored in a ROM (not shown) into a RAM (not shown) and executing the program read into the RAM. Yes.

  The CPU 11 that executes the above program constitutes a control means in the present invention, selects one piece of acoustic information from the acoustic information stored in the acoustic database 10, and outputs the selected acoustic information to one of the decoders 14 and 15. Thus, it is converted into an acoustic signal and output to the speaker 19 (hereinafter simply referred to as “signal output”).

  Here, the selection of the acoustic information stored in the acoustic database 10 depends on automatic selection in which acoustic information is sequentially selected like music reproduction based on a playlist, and input by the user via the input device 13. Manual selection in which acoustic information is selected.

  In addition, when the sound information to be output to the speaker 19 is switched when the sound information to be output to the speaker 19 is output to one of the decoders 14 and 15, the CPU 11 outputs the next signal to the speaker 19. The sound information to be output is output to the other one of the decoders 14 and 15, and the level adjusters 16 and 17 are controlled to fade out the sound information output to the speaker 19 and the sound to be output next to the speaker 19 A crossfade that fades in information is applied.

  For example, when the sound information to be output to the speaker 19 is switched when the sound information to be output to the speaker 19 is output to the decoder 14, the CPU 11 is to output the sound information to the speaker 19 to be output next. Is output to the decoder 15, and the level adjuster 16 is controlled to fade out the acoustic information output to the decoder 14, while the level adjuster 17 is controlled to fade in the acoustic information output to the decoder 15. .

  Similarly, when switching the sound information to be output to the speaker 19 while the sound information to be output to the speaker 19 is being output to the decoder 15, the CPU 11 is configured to output the sound to be subsequently output to the speaker 19. The information is output to the decoder 14, the level adjuster 17 is controlled to fade out the acoustic information output to the decoder 15, and the level adjuster 16 is controlled to fade out the acoustic information output to the decoder 14. Let

  The operation of the sound reproduction control device 1 configured as described above will be described with reference to FIG. FIG. 2 is a flowchart showing a switching operation of acoustic information to be output to the speaker 19 by the CPU 11.

  First, when switching the acoustic information (S1), the CPU 11 determines whether the acoustic information to be output next to the speaker 19 is automatically selected or manually selected (S2).

  When determining that the acoustic information is manually selected, the CPU 11 selects a predetermined time T1 as a time for fading in the acoustic information (S3).

  On the other hand, if it is determined that the acoustic information is automatically selected, the CPU 11 determines whether or not the tempo represented by the tone information of the acoustic information is equal to or greater than a predetermined first threshold value. (S4). In the present embodiment, the first threshold is 120 BPM.

  When it is determined that the tempo represented by the music tone information is equal to or greater than the first threshold, the CPU 11 selects time T1 as a time to fade in the sound information (S3).

  On the other hand, if the CPU 11 determines that the tempo represented by the tune information is less than a predetermined first threshold, the CPU 11 determines that the average sound pressure represented by the tune information of the acoustic information is greater than or equal to a predetermined second threshold. It is determined whether or not (S5). In the present embodiment, the second threshold is set to −20 dB.

  When determining that the average sound pressure represented by the music tone information is equal to or greater than the second threshold, the CPU 11 selects time T1 as a time for fading in the acoustic information (S3).

  On the other hand, if the CPU 11 determines that the average sound pressure represented by the tone information is less than the second threshold, the CPU 11 determines whether the song length represented by the tone information of the acoustic information is less than a predetermined third threshold. It is determined whether or not (S6). In the present embodiment, the third threshold is 3 minutes.

  If it is determined that the music length represented by the music tone information is less than the third threshold, the CPU 11 selects time T1 as a time for fading in the acoustic information (S3).

  On the other hand, when it is determined that the song length represented by the music tone information is equal to or greater than the third threshold, the CPU 11 determines whether the genre represented by the music tone information of the acoustic information is pop or rock (S7). .

  When it is determined that the genre represented by the music tone information is pop or rock, the CPU 11 selects time T1 as a time to fade in the sound information (S3).

  On the other hand, when it is determined that the genre represented by the tune information is not pops or rock like classical music, a time T2 that is predetermined as a time for fading in the sound information and is longer than the time T1 is selected (S8).

  Next, the CPU 11 controls the level adjusters 16 and 17 to fade out the acoustic information output from the speaker 19 and select the acoustic information to be output next from the speaker 19 in step S3 or S8. Fade in over time (S9).

  The volume 30 of the acoustic information that is output to the speaker 19 and the volume 31 of the acoustic information that is output to the speaker 19 by the above-described operation are shown in FIG. The acoustic information that changes as shown in FIG. 3A and is then output as a signal to the speaker 19 is faded in over time T2.

  On the other hand, the volume 30 of the acoustic information output to the speaker 19 and the volume 31 of the acoustic information output next to the speaker 19 are shown in FIG. 3B when the time T1 is selected by the CPU 11. ), And the acoustic information that is then output as a signal to the speaker 19 is faded in over a time T1 that is shorter than the time T2.

  Since the sound reproduction control device 1 according to the embodiment of the present invention fades in the sound information to be output next to the sound output device over time corresponding to the tune, it does not give the user unpleasant feeling. In addition, a plurality of pieces of acoustic information can be smoothly output to the acoustic output device.

  The timer 12, the decoders 14 and 15, the level adjusters 16 and 17, and the mixer 18 that constitute the sound reproduction control device 1 may be integrally configured by the CPU 11.

  In FIG. 2, the CPU 11 has been described as selecting the time during which the acoustic information is faded in by determining the four conditions of steps S4 to S7, but the CPU 11 is at least one of steps S4 to S7. By determining one condition, the time for fading in the acoustic information may be selected, and by determining other conditions based on other parameters included in the music tone information, the acoustic information may be faded in. You may make it select the time to carry out.

  In FIG. 2, the CPU 11 has been described as selecting the time T <b> 1 when any of the four conditions of steps S <b> 4 to S <b> 7 is satisfied. However, the CPU 11 performs steps S <b> 4 to S <b> 7. The time T1 may be selected when all the four conditions are satisfied.

  Further, the CPU 11 may select the time T1 when a predetermined number of conditions among the four conditions of steps S4 to S7 are satisfied.

  Further, instead of determining the four conditions of steps S4 to S7, the CPU 11 assigns weights to numerical values of parameters such as tempo, average sound pressure, song length, and genre represented by the song information. An evaluation value obtained by addition may be calculated, and a time for fading in the acoustic information may be selected according to the calculated evaluation value. Further, the CPU 11 may fade in the acoustic information over a time proportional to the calculated evaluation value.

  In the present embodiment, the CPU 11 is described as selecting the time for fading in the acoustic information from the time T1 and the time T2. However, the CPU 11 does not have the tempo, the average sound pressure, the music represented by the music tone information. Depending on each parameter such as length and genre, the time for fading in the acoustic information may be selected from another time in addition to the time T1 and the time T2.

(Second Embodiment)
In the present embodiment, the sound reproduction control device of the present invention is suitable for mounting on a vehicle. FIG. 4 shows a sound reproduction control apparatus according to the second embodiment of the present invention. In addition, in each structure of the sound reproduction control apparatus 40 of the 2nd Embodiment of this invention, the same code | symbol is attached about the thing similar to each structure of the sound reproduction control apparatus 1 which concerns on the 1st Embodiment of this invention. A description thereof will be omitted.

  In FIG. 4, the sound reproduction control device 40 includes a sound database 10, a CPU 11, a timer 12, an input device 13, decoders 14 and 15, level adjusters 16 and 17, a mixer 18, a speaker 19, And a driving situation information storage unit 41 that stores driving situation information representing the driving situation of the host vehicle.

  The operation status information storage unit 41 is configured by a rewritable storage medium such as a hard disk, RAM, or flash memory. The driving status information includes information representing the moving speed of the own vehicle, the type of road on which the own vehicle is traveling, the current time zone, and the like.

  In the present embodiment, the CPU 11 is configured in the same way as the CPU 11 configuring the sound reproduction control device 1 according to the first embodiment of the present invention, but a program executed by the CPU 11 is the first of the present invention. This is different from the program executed by the CPU 11 in the first embodiment.

  For example, the CPU 11 stores information representing the traveling speed of the host vehicle obtained from a vehicle speed sensor that detects the vehicle speed based on the number of rotations of the wheels of the host vehicle in the driving situation information storage unit 41.

  Further, the CPU 11 displays information indicating the type of road determined based on the position of the own vehicle measured by a GPS (Global Positioning System) receiver provided in the own vehicle and the map data stored in the map database. The operation status information storage unit 41 stores the information.

  Further, the CPU 11 stores information representing the time zone determined based on the time calculated from the signal obtained from the timer 12 or the like in the driving situation information storage unit 41.

  The operation of the sound reproduction control device 40 configured as described above will be described with reference to FIGS. 5 and 6. 5 and 6 are flowcharts showing the switching operation of the acoustic information to be output to the speaker 19 by the CPU 11.

  First, when switching the acoustic information (S21), the CPU 11 determines whether the acoustic information to be output next to the speaker 19 is automatically selected or manually selected (S22).

  When determining that the acoustic information is manually selected, the CPU 11 selects a predetermined time T1 as a time for fading in the acoustic information (S23).

  On the other hand, if it is determined that the acoustic information is automatically selected, the CPU 11 determines whether or not the tempo represented by the tone information of the acoustic information is equal to or greater than a predetermined first threshold value. (S24). In the present embodiment, the first threshold is 120 BPM.

  When it is determined that the tempo represented by the music tone information is equal to or greater than the first threshold, the CPU 11 selects time T1 as a time for fading in the acoustic information (S23).

  On the other hand, if the CPU 11 determines that the tempo represented by the tune information is less than a predetermined first threshold, the CPU 11 determines that the average sound pressure represented by the tune information of the acoustic information is greater than or equal to a predetermined second threshold. It is determined whether or not (S25). In the present embodiment, the second threshold is set to −20 dB.

  When it is determined that the average sound pressure represented by the music tone information is equal to or greater than the second threshold, the CPU 11 selects time T1 as a time for fading in the acoustic information (S23).

  On the other hand, if the CPU 11 determines that the average sound pressure represented by the tone information is less than the second threshold, the CPU 11 determines whether the song length represented by the tone information of the acoustic information is less than a predetermined third threshold. It is determined whether or not (S26). In the present embodiment, the third threshold is 3 minutes.

  If it is determined that the music length represented by the music tone information is less than the third threshold, the CPU 11 selects time T1 as a time for fading in the acoustic information (S23).

  On the other hand, if it is determined that the song length represented by the music tone information is greater than or equal to the third threshold value, the CPU 11 determines whether or not the genre represented by the music tone information of the acoustic information is pop or rock (S27). .

  When it is determined that the genre represented by the music tone information is pop or rock, the CPU 11 selects time T1 as time to fade in the sound information (S23).

  On the other hand, when it is determined that the genre represented by the music tone information is not pops or rock like classic, the CPU 11 determines whether or not the moving speed represented by the driving situation information is equal to or greater than a predetermined fourth threshold value. Judgment is made (S28). In the present embodiment, the fourth threshold value is 60 km / h.

  When it is determined that the moving speed represented by the driving situation information is equal to or higher than the fourth threshold, the CPU 11 selects time T1 as time to fade in the acoustic information (S23).

  On the other hand, when determining that the moving speed represented by the driving situation information is less than the fourth threshold, the CPU 11 determines whether or not the type of road represented by the driving situation information indicates an expressway (S29). . In the present embodiment, the type of road represented by the driving situation information indicates one of an expressway and a general road.

  If it is determined that the type of road represented by the driving status information indicates a highway, the CPU 11 selects time T1 as a time to fade in the acoustic information (S23).

  On the other hand, when it is determined that the type of road represented by the driving status information indicates a general road, the CPU 11 determines whether or not the current time zone is daytime (S30). In the present embodiment, it is assumed that the time from 6 am to 6 pm is daytime, and the time from 6 pm to 6 am is nighttime.

  If it is determined that the current time zone is daytime, the CPU 11 selects time T1 as the time for fading in the acoustic information (S23).

  On the other hand, when determining that the current time zone is nighttime, the CPU 11 selects a time T2 that is predetermined as a time for fading in the acoustic information and is longer than the time T1 (S31).

  Next, the CPU 11 controls the level adjusters 16 and 17 to fade out the acoustic information output from the speaker 19 and select the acoustic information to be output next from the speaker 19 in step S23 or S31. Fade in over time (S32).

  The sound reproduction control device 40 according to the second embodiment of the present invention is used to add the sound information to be output next to the sound output device to the tone and fade in over the time according to the driving situation. A plurality of pieces of acoustic information can be smoothly output to the acoustic output device without causing discomfort to the person.

  5 and 6, the CPU 11 has been described as selecting the time during which the acoustic information is faded in by determining the seven conditions of steps S24 to S30. However, the CPU 11 performs steps S24 to S30. By determining at least one of the conditions, a time for fading in the acoustic information may be selected, and further determining other conditions based on other parameters included in the music tone information and the driving situation information The time for fading in the acoustic information may be selected.

  5 and 6, the CPU 11 has been described as selecting the time T1 when any one of the seven conditions of steps S24 to S30 is satisfied. The time T1 may be selected when all of the seven conditions S to S30 are satisfied.

  Further, the CPU 11 may select the time T1 when a predetermined number of conditions among the seven conditions of steps S24 to S30 are satisfied.

  Further, instead of determining the seven conditions of steps S24 to S30, the CPU 11 determines the parameters of the host vehicle represented by the parameters such as the tempo, average sound pressure, song length, and genre represented by the music tone information, and the driving situation information. Calculate the evaluation value obtained by adding and weighting each parameter such as moving speed, the type of road on which the vehicle is traveling, and the current time zone, and add it to the calculated evaluation value. Accordingly, the time for fading in the acoustic information may be selected. Further, the CPU 11 may fade in the acoustic information over a time proportional to the calculated evaluation value.

  In the present embodiment, the CPU 11 is described as selecting the time for fading in the acoustic information from the time T1 and the time T2. However, the CPU 11 does not have the tempo, the average sound pressure, the music represented by the music tone information. Depending on each parameter such as length and genre, and the moving speed of the vehicle represented by the driving status information, the type of road on which the vehicle is traveling, and the current time zone, the time T1 and time T2 In addition, a time for fading in the acoustic information from another time may be selected.

  As described above, the sound reproduction control device according to the present invention has an effect that the sound output device can smoothly output a plurality of pieces of sound information without causing discomfort to the user. Is useful as a sound reproduction control device or the like that outputs a sound to a sound output device.

The block diagram of the sound reproduction control apparatus in the 1st Embodiment of this invention The flowchart for demonstrating operation | movement of the sound reproduction control apparatus in the 1st Embodiment of this invention. The graph for demonstrating the cross fade by the sound reproduction control apparatus in the 1st Embodiment of this invention The block diagram of the sound reproduction control apparatus in the 2nd Embodiment of this invention The flowchart for demonstrating operation | movement of the sound reproduction control apparatus in the 2nd Embodiment of this invention. Flow diagram following FIG.

Explanation of symbols

1, 40 Sound reproduction control device 10 Sound database 11 CPU
12 Timer 13 Input device 14, 15 Decoder 16, 17 Level adjuster 18 Mixer 19 Speaker 41 Operation status information storage unit

Claims (10)

In the sound reproduction control device including a control unit that fades in the sound information to be output next to the sound output device while fading out the sound information output to the sound output device,
The control means acquires tune information representing the tune of the sound information to be output next to the sound output device from the recording medium, and fades in the sound information over time according to the acquired tune information. A sound reproduction control device. The music tone information includes information representing the tempo of the music represented by the corresponding acoustic information,
The sound reproduction control apparatus according to claim 1, wherein the control means fades in the sound information over a longer time as the tempo is slower. The music tone information includes information representing the average sound pressure of the music represented by the corresponding acoustic information,
3. The sound reproduction control device according to claim 1, wherein the control means fades in the sound information over a longer time as the average sound pressure is lower. The music tone information includes information representing the length of the music represented by the corresponding acoustic information,
4. The sound reproduction control device according to claim 1, wherein the control means fades in the sound information over a longer time as the music length is longer. The music tone information includes information representing the genre of the music represented by the corresponding acoustic information,
5. The sound reproduction control device according to claim 1, wherein the control unit fades in the sound information over a time corresponding to the genre. The control means acquires driving status information representing a driving status of a vehicle on which the sound reproduction control device is mounted from a storage medium, and then outputs the driving status information to the acoustic output device over time according to the acquired driving status information. The sound reproduction control device according to claim 1, wherein the sound information to be faded in. The driving status information includes information representing the moving speed of the vehicle,
The sound reproduction control apparatus according to claim 6, wherein the control unit fades in the sound information to be output next to the sound output device over a long time as the moving speed is low. The driving status information includes information indicating the type of road on which the vehicle is traveling,
The sound reproduction control device according to claim 6 or 7, wherein the control means fades in the sound information to be output next to the sound output device over time according to the type of the road. . The driving status information includes information representing the current time zone,
The sound reproduction according to any one of claims 6 to 8, wherein the control means fades in sound information to be next output to the sound output device over a period of time according to the time zone. Control device. The control means fades in the selected acoustic information according to the input by the user in a time shorter than the time for fading in the sequentially selected acoustic information. The sound reproduction control device according to any one of the above.

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