JP2001093231A - Disk reproducing device, volume adjusting/reproducing method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device reproducing respective compositions recorded on plural CDs, etc., with suitable volume. SOLUTION: A processing control part inputs a set volume value through a key input part (step S22). Then, the peak value of the recording level of the CD is gained from disk information in a memory (step S23), and a reproducing volume value is obtained (step S24). The processing control part discriminates whether or not the reproducing volume value is smaller than the set volume value (step S26). When the smaller is discriminated, the processing control part increases an electronic volume value so that the reproducing volume value becomes equal to the set volume value (step S27). On the other hand, when the matter that the reproducing volume value is larger than the set volume value is discriminated, the electronic volume value is reduced (step S28). The processing control part reproduces the composition data of the CDs in the state that the reproducing volume value is equal to the set volume value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus, a volume adjusting / reproducing method, and a recording medium capable of reproducing each music recorded on a plurality of CDs or the like at an appropriate volume.

[0002]

2. Description of the Related Art Along with the spread of music CDs (compact discs) and the like, disc playback devices represented by CD players have been widely used as one of the most popular music playback devices. This disc reproducing apparatus manages a plurality of music pieces recorded on a CD by using a track number defined for each music piece. Then, various reproductions can be performed using the track numbers. For example, the disc reproducing apparatus can reproduce the music corresponding to the track number selected by the user in the selected order by the program reproducing function. Further, the music of the track number selected by the random number can be sequentially reproduced by the random reproduction function.

[0003] In recent years, there has been known a multiple disc reproducing apparatus which can store a plurality of CDs and switch each CD at any time for reproduction. Such a multiple-disc disk reproducing apparatus can store a plurality of CDs and perform continuous reproduction for a long time. In addition, the multiple-disc disc reproducing device is used to store each CD.
Are managed by disc numbers, and further various reproductions can be performed by using the disc numbers and the track numbers of the respective CDs. The multiple-disc reproducing apparatus can reproduce, for example, a program having a disk number and a track number selected by a user in a selected order by a program reproducing function. In other words, the user can select from a plurality of CDs stored in such a multiple disk playback device,
Songs to be played are sequentially selected and programmed as playback targets. As a result, it is possible to realize continuous reproduction of music selected from a plurality of CDs without editing music on a cassette tape or the like.

[0004]

By the way, in the case of a CD to be reproduced by a multiple disk reproducing apparatus or the like, generally, the recording level (recording level) of music differs depending on the CD producing company and the like. Therefore, even when the volume for adjusting the volume is set to a constant value during continuous reproduction in the multiple disk reproducing apparatus, the reproduction volume of the music changes when the CD to be reproduced is switched.

[0005] That is, when a change in the playback volume is large to some extent when the CD to be played back is switched by the multiple disk playback device or the like, the user operates the operation panel by himself to obtain an appropriate playback volume. You have to adjust the volume. For example, if a CD with a recording level of “medium” is reproduced at an appropriate reproduction volume and then a CD with a recording level of “high” is reproduced, the user will be unable to play the music because the reproduction volume of the reproduced music is too high. It is necessary to adjust the volume so as to lower the playback volume. Furthermore, when a CD with a recording level of "low" is reproduced, the volume of the reproduced music is too low. Therefore, it is necessary to adjust the volume to increase the reproduction volume.

As described above, the user has to operate the operation panel to adjust the volume every time the CD to be played back is switched in the multiple disk playback device, which is extremely complicated.

The present invention has been made in view of the above situation, and provides a disk reproducing apparatus, a volume adjusting / reproducing method, and a recording medium capable of reproducing each music recorded on a plurality of CDs or the like at an appropriate volume. The purpose is to do.

[0008]

In order to achieve the above object, a disk reproducing apparatus according to a first aspect of the present invention comprises: reproducing means for reproducing music recorded on a recording medium at a predetermined recording level; A volume increasing / decreasing unit for increasing / decreasing a reproduction volume when the reproducing unit reproduces a song, a recording level acquiring unit for acquiring a recording level of the song recorded on a recording medium, and a recording level acquired by the recording level acquiring unit. It is characterized by comprising a recording level storing means for storing, and a volume adjusting means for adjusting the volume increasing / decreasing means according to the recording level stored in the recording level storing means.

According to this invention, the reproducing means reproduces the music recorded on the recording medium at the predetermined recording level. The volume increasing / decreasing unit increases / decreases a reproduction volume when the reproducing unit reproduces the music. The recording level acquisition means acquires the recording level of the music piece recorded on the recording medium. The recording level storage means stores the recording level acquired by the recording level acquisition means. The sound volume adjusting means adjusts the sound volume increasing and decreasing means according to the recording level stored in the recording level storage means. As a result, since the reproduction volume is adjusted according to the recording level of the music recorded on the recording medium, each music recorded on the plurality of recording media can be reproduced at an appropriate volume.

[0010] In order to achieve the above object, a disk reproducing apparatus according to a second aspect of the present invention comprises: reproducing means for reproducing music recorded on a recording medium at a predetermined recording level; Volume increase / decrease means for increasing / decreasing a reproduction volume at the time of reproduction according to its own variable value, volume setting means for setting a target volume at the time of reproducing the music, and a recording level of the music recorded on the recording medium are obtained. Recording level obtaining means, a recording level storing means for storing the recording level obtained by the recording level obtaining means, and a reproduction level of the music determined according to the recording level stored in the recording level storing means and a variable value of the volume increasing / decreasing means. Comprises a sound volume adjusting means for adjusting a value of a variable value of the sound volume increasing / decreasing means so as to be equal to the target sound volume set by the sound volume setting means. And butterflies.

According to the present invention, the reproducing means reproduces the music recorded on the recording medium at the predetermined recording level. The volume increase / decrease means increases / decreases the reproduction volume when the reproduction means reproduces the music in accordance with its own variable value. The sound volume setting means sets a target sound volume for reproducing the music. The recording level acquisition means acquires the recording level of the music piece recorded on the recording medium. The recording level storage means stores the recording level acquired by the recording level acquisition means. The sound volume adjusting means is configured such that the playback volume of the music determined according to the recording level stored in the recording level storage means and the variable value of the volume increasing / decreasing means is
The variable value of the volume increasing / decreasing unit is adjusted so as to be equal to the target volume set by the volume setting unit. As a result, since the reproduction volume is adjusted so as to be equal to the target volume according to the recording level or the like of the music recorded on the recording medium, each music recorded on the plurality of recording media can be reproduced at an appropriate volume. .

In order to achieve the above object, a disk reproducing apparatus according to a third aspect of the present invention is a multiple disk reproducing apparatus capable of switching and reproducing a plurality of stored disks at any time, and has a predetermined recording level. Means for reproducing music recorded on the disc by means of the reproducing means, volume means for increasing or decreasing the reproduction volume when the reproducing means reproduces the music, and obtaining peak values of recording levels of a plurality of music recorded on the disc. A peak value acquisition unit, a peak value storage unit that stores the recording level acquired by the peak value acquisition unit, and a volume adjustment unit that adjusts the volume unit according to the peak value of the recording level acquired by the peak value storage unit. , Is provided.

According to the present invention, the reproducing means reproduces the music recorded on the disc at the predetermined recording level. The volume means increases or decreases the reproduction volume when the reproduction means reproduces the music. The peak value acquiring means acquires peak values of recording levels of a plurality of music pieces recorded on the disc. The peak value storage means stores the recording level acquired by the peak value acquisition means. The volume adjustment means adjusts the volume means according to the peak value of the recording level stored in the peak value storage means. As a result, since the reproduction volume is adjusted according to the recording level of the music recorded on the disc, each music recorded on the plurality of discs can be reproduced at an appropriate volume.

In order to achieve the above object, a disk reproducing apparatus according to a fourth aspect of the present invention is a multiple disk reproducing apparatus capable of reproducing a plurality of stored disks by switching the disks at any time. A reproducing means for reproducing the music recorded on the disc, a volume means for increasing or decreasing the reproduction volume when the reproducing means reproduces the music according to a variable value owned by the reproducing means, and a target volume for reproducing the music. Volume setting means, peak value acquisition means for acquiring peak values of recording levels in a plurality of songs recorded on a disc, peak value storage means for storing the recording levels acquired by the peak value acquisition means, The reproduction volume of the music determined according to the peak value of the recording level stored in the value storage means and the variable value of the volume means is transmitted to the volume setting means. To equal the set target volume Ri, characterized in that it comprises, a volume adjusting means for adjusting the variable value of the volume means.

According to the present invention, the reproducing means reproduces the music recorded on the disc at the predetermined recording level. The volume means increases or decreases the reproduction volume when the reproduction means reproduces the music in accordance with its own variable value. The sound volume setting means sets a target sound volume for reproducing the music. The peak value acquiring means acquires peak values of recording levels of a plurality of music pieces recorded on the disc. The peak value storage means stores the recording level acquired by the peak value acquisition means. The volume adjustment means controls the volume means so that the playback volume of the music determined according to the peak value of the recording level stored in the peak value storage means and the variable value of the volume means is equal to the target volume set by the volume setting means. Adjust the variable value. As a result, since the reproduction volume is adjusted so as to be equal to the target volume according to the recording level of the music recorded on the disc, each music recorded on the plurality of discs can be reproduced at an appropriate volume.

The peak value acquiring means may acquire the maximum value of the detected recording level by sampling a plurality of music pieces recorded on the disk for a predetermined time.

In order to achieve the above object, a sound volume adjusting / reproducing method according to a fifth aspect of the present invention comprises: a reproducing step of reproducing music recorded on a recording medium at a predetermined recording level;
A volume increasing / decreasing step of increasing / decreasing a reproduction volume of the music reproduced in the reproduction step according to a variable value, a volume setting step of setting a target volume when reproducing the music, and a recording level of the music recorded on the recording medium A recording level acquisition step of acquiring a, a volume adjustment step of adjusting a value of a variable value when increasing or decreasing the reproduction volume of the music in the volume increase / decrease step according to the recording level acquired in the recording level acquisition step, It is characterized by having.

According to the present invention, the reproducing step reproduces the music recorded on the recording medium at the predetermined recording level. The volume increase / decrease step increases / decreases the reproduction volume of the music reproduced in the reproduction step according to a variable value. The recording level acquisition step acquires a recording level of a music piece recorded on the recording medium. The sound volume adjusting step adjusts the value of a variable value when increasing or decreasing the reproduction volume of the music in the sound volume increasing / decreasing step in accordance with the recording level acquired in the recording level acquiring step. As a result, since the reproduction volume is adjusted according to the recording level of the music recorded on the recording medium, each music recorded on the plurality of recording media can be reproduced at an appropriate volume.

In order to achieve the above object, a recording medium according to a sixth aspect of the present invention reproduces music recorded on a disc at a predetermined recording level, and reproduces the music in the reproducing step. A volume increase / decrease step of increasing / decreasing a music reproduction volume according to a variable value; a recording level acquisition step of acquiring a recording level of the music recorded on the disc; and a recording level acquired in the recording level acquisition step. A program for causing a computer to execute a sound volume adjusting / reproducing method including a sound volume adjusting step of adjusting a value of a variable value at the time of increasing / decreasing a music playing volume in an increasing / decreasing step is recorded.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of a disk reproducing apparatus applied to the embodiment of the present invention. This disc reproducing apparatus is a multiple CD reproducing apparatus capable of storing a plurality of CDs (compact discs) and switching and reproducing each CD at any time, and includes a processing control unit 1, a signal processing circuit 2, a spindle servo circuit 3, , Optical pickup 4
And a tracking thread servo circuit 5 and a DAC 6
, Electronic volume 7, key input unit 8, memory 9
, A display unit 10 and a disc changer 11.

The processing control unit 1 includes a CPU (Central Processes).
sing unit) and peripheral LSI (LargeScale Integratio)
n), and controls the entire disc reproducing apparatus. That is, the processing control unit 1 controls the disk changer 11 to store a plurality of stored C
Of D, the CD to be reproduced is transported onto a predetermined turntable. Then, by controlling the signal processing circuit 2 and the like, C
The music data recorded in D is read and reproduced. At this time, the processing control unit 1 controls the electronic volume so that the playback volume value determined by the peak value of the recording level (recording level) detected in the sampling process described later becomes equal to the volume value set by the user. Adjust 7 to play the song.

The signal processing circuit 2 controls a spindle servo circuit 3, an optical pickup 4, a tracking thread servo circuit 5, and the like. Then, the music data and the like stored on the CD to be reproduced are read out via the optical pickup 4. The signal processing circuit 2 decodes the read music data and supplies the decoded music data to the DAC 6. Also,
The signal processing circuit 2 performs C
Each music data stored in D is sampled for a predetermined time, and the peak value of the recording level in each CD is detected.

The spindle servo circuit 3 drives and controls a spindle motor (not shown) for rotating a predetermined turntable on which the CD is mounted, and drives the spindle motor to rotate at a predetermined rotation speed.

The optical pickup 4 irradiates a laser beam of a predetermined wavelength toward a pit or the like provided on the recording surface of the CD, receives the reflected light, and converts the reflected light into an electric signal. The optical pickup 4 supplies the converted electric signal to the signal processing circuit 2 as music data or the like.

The tracking thread servo circuit 5 drives and controls a thread motor (not shown) for moving the optical pickup 4 in parallel in the radial direction of the CD to move the optical pickup 4 to a predetermined position on the recording surface of the CD. .

DAC (Digital / Analog Converter)
6 converts the digital music data sent from the signal processing circuit 2 into an analog music signal, and supplies the converted music signal to the electronic volume 7.

The electronic volume 7 is controlled by the processing control unit 1, amplifies or attenuates the music signal supplied from the DAC according to the value set by itself, and then sounds (amplifies) via a predetermined amplifier and speaker. Music).

The key input unit 8 includes predetermined button switches, rotary switches, and the like, inputs instruction information according to a user's operation, and supplies the input information to the processing control unit 1. For example, the key input unit 8 inputs designation information for designating a CD and music to be reproduced according to a user operation, and supplies the information to the processing control unit 1.

The memory 9 has a random access memory (RAM).
ry) or EEPROM (Electrically Erasable and
The disk information 91 as shown in FIG. 2 is stored. The disc information 91 includes a peak value corresponding to each CD stored in the disc reproducing apparatus and TOC (Table Of Contents) information.
This is information generated by a sampling process described later. Specifically, the peak value shown in FIG. 2 is the maximum value of the recording level in the CD obtained by sampling each piece of music data stored in the CD for a predetermined time. Also, T
The OC information is information including the track number of each piece of music data, the playing time, and the like.

Returning to FIG. 1, the display unit 10 is provided with an LCD (Li
It is controlled by the processing control unit 1 and displays a character string or the like for clarifying the operation status or the like to the user.

The disk changer 11 comprises, for example, a storage unit for storing a plurality of CDs and a bank-type disk exchange mechanism. The disc changer 11 is controlled by the processing control unit 1 and, for example, pulls out a target CD from a storage unit capable of storing a maximum of 200 CDs and mounts it on a predetermined turntable.

Hereinafter, the operation of the disk reproducing apparatus according to the embodiment of the present invention will be described with reference to the drawings.

First, the sampling process for sampling the recording level of each CD stored in the disc reproducing apparatus will be described. FIG. 3 is a flowchart for explaining the sampling process. The sampling process shown in FIG. 3 is started in response to sampling instruction information input by the user via the key input unit 8 after a plurality of CDs have been loaded into the disc reproducing apparatus.

First, the processing control unit 1 sets T
The OC information is read (step S11). That is, the processing control unit 1 includes an area different from the music data recording area in the target CD, for example, the number of programs recorded in the lead-in area, the start position of each program, the reproduction time of each program, and the like. Read the TOC information.

The processing controller 1 detects the peak value of the recording level of the CD (step S12). That is, the processing control unit 1 samples each piece of music data recorded on the CD for a predetermined time, and detects a peak value that is the maximum value of the recording level. For example, the processing control unit 1 reads out the TOC
According to the information, from the first music piece to the last music piece, a recording level of several milliseconds is sampled from a position jumped backward by several tracks with respect to a start position of each music data as a reference.
Then, the largest value among the recording levels is detected as a peak value.

The processing control section 1 stores the detected peak value in the disk information 91 corresponding to the disk number (step S13). Similarly, the processing control unit 1 performs step S
The TOC information read in step 11 is stored in the disk information 91 corresponding to the disk number (step S14).

The processing control section 1 determines whether or not sampling has been completed for all disks (step S).
15). That is, the processing control unit 1 samples all the CDs stored in the disk reproducing apparatus, and determines whether or not each peak value or the like is stored in the disk information 91.

When the processing control section 1 determines that the sampling has not been completed for all the disks, it controls the disk changer 11 to switch the CD to be sampled, and then returns the processing to step S11. The processes of S11 to S15 are repeatedly executed. On the other hand, when it is determined that sampling has been completed for all disks, the processing control unit 1 ends the sampling processing.

As described above, the peak value of the recording level of each CD is detected by the sampling process, and the detected peak value is stored in the disc information 91. This peak value is one of the factors that determine the playback volume when the music data of the CD is played. Specifically, the playback volume of the music data on the CD can be determined by the peak value and the value of the electronic volume 7.

Next, a description will be given of a volume adjustment reproduction process for reproducing the music data of each CD while adjusting the reproduction volume so as to conform to the set volume input by the user. FIG.
5 is a flowchart for explaining a volume adjustment reproduction process. In the volume adjustment reproduction process shown in FIG. 4, after the peak value of the recording level of each CD and the like are stored in the disc information 91 in the above-described sampling process, the user inputs the information through the key input unit 8. Start in response to instruction information.

First, the processing control section 1 determines whether or not a reproduction instruction has been input (step S21). That is,
The processing control unit 1 determines whether or not reproduction instruction information for instructing reproduction of a predetermined CD has been input from the user via the key input unit 8.

When the processing control section 1 determines that the reproduction instruction has not been input, the processing for volume adjustment reproduction is terminated without any particular processing. On the other hand, if it is determined that the reproduction instruction has been input, the processing control section 1 inputs the set volume value via the key input section 8 (step S22). That is, the processing control unit 1 acquires the set volume value input by the user via the key input unit 8 and stores the set volume value in a predetermined area of the memory 9.

The processing control section 1 acquires the target peak value from the disk information 91 (step S23). That is, the processing control unit 1 obtains the peak value of the recording level detected by the above-described sampling processing in the CD to be reproduced.

The processing controller 1 obtains a reproduction volume value determined by the acquired peak value and the like (step S24). That is, the processing control unit 1 obtains a reproduction volume value of music data determined by the acquired peak value and the current value of the electronic volume 7.

The processing control section 1 determines whether or not the obtained reproduction sound volume value is equal to the set sound volume value obtained in step S22 (step S25). That is, the processing control unit 1 determines whether or not the playback volume value equal to the set volume value input by the user when playing back the acquired peak value CD (music data) at the current value of the electronic volume 7 Is determined.

When the processing control unit 1 determines that the set volume value and the reproduction volume value are equal, the process proceeds to step S29 described later. On the other hand, if it is determined that the set volume value is not equal to the playback volume value, the processing control unit 1 determines whether the playback volume value is smaller than the set volume value (step S2).
6).

When the processing control section 1 determines that the reproduction volume value is smaller than the set volume value, it increases the value of the electronic volume 7 (step S27). That is, the processing control unit 1
Controls the electronic volume 7 to increase the value of the electronic volume 7 so that the reproduction volume value becomes equal to the set volume value.

On the other hand, if it is determined that the playback volume value is not smaller than the set volume value (the playback volume value is larger than the set volume value), the processing control unit 1 sets the playback volume value to be equal to the set volume value. The value of the electronic volume 7 is reduced (Step S28). As described above, when the playback volume value is not equal to the set volume value, the processing control unit 1 automatically adjusts the value of the electronic volume 7 so that the playback volume value becomes equal to the set volume value.

The processing control section 1 plays back the disc (step S29). That is, the processing control unit 1 sequentially reproduces the music data of the CD in a state where the reproduction volume value is equal to the set volume value.

After reproducing all the music data, the processing control section 1 determines whether or not a disc change is necessary (step S30). That is, the processing control unit 1 determines whether or not another CD to be subsequently reproduced is selected according to a user's instruction or the like.

When the processing control section 1 determines that a disk change is necessary, the processing control section 1 controls the disk changer 11 to mount a new target CD on a predetermined turntable, and then proceeds to step S23. Then, the processes of steps S23 to S30 are repeatedly executed. On the other hand, when it is determined that the disc change is not necessary, the processing control section 1 determines whether or not a reproduction end instruction has been input (step S31). That is, the processing control unit 1
The reproduction end instruction information for instructing the end of the reproduction is input to the key input unit 8.
It is determined whether or not an input has been made by the user via the.

When it is determined that the reproduction end instruction has not been input, the processing control section 1 returns the processing to step S30. On the other hand, if it is determined that the playback end instruction has been input,
The processing control section 1 ends the volume adjustment reproduction processing.

As described above, according to the volume adjustment reproduction process, the reproduction volume value is obtained from the peak value of the recording level of the CD to be reproduced and the current value of the electronic volume 7.
Then, the playback volume value is compared with the set volume value, and if there is a difference, the value of the electronic volume 7 is adjusted so that the playback volume value becomes equal to the set volume value. As a result, even when the recording levels of songs recorded on a plurality of CDs are different,
Each song can be reproduced at an appropriate volume.

In the above embodiment, in the sampling process, all the music data recorded on the CD are sampled and the peak value of the recording level is detected, but the number of music to be sampled is arbitrary. For example, only the first music data and the last music data on a CD may be sampled, and the peak value of the recording level may be detected from the two. The sampling time and the like are also arbitrary.

The value for specifying the recording level of the CD and for determining the reproduction volume value is not limited to the peak value of the recording level, but may be any value. For example, the average value of the sampled recording levels may be determined, and the playback volume value may be determined using the average value of the determined recording levels. Further, when the music data of the CD is actually reproduced, the recording level may be measured again, and the peak value or the like detected in the sampling processing may be corrected.

In the above embodiment, the electronic volume 7 was controlled to adjust the reproduction volume value in the volume adjustment reproduction process. However, the method of adjusting the reproduction volume value is not limited to the electronic volume 7 but may be any method. It is. For example, the reproduction volume value may be adjusted by adjusting the amplification factor (gain) of the DAC 6.

Furthermore, in the above-described embodiment, the disc reproducing apparatus for reproducing a CD has been described. However, the medium to be reproduced is not limited to a CD, but may be an MD (mini-disc), a D
The present invention is applicable to a disc reproducing apparatus for reproducing a VD (digital video disc) or the like. Further, a playback device that can play back a medium such as SmartMedia (trademark) or Memory Stick (trademark) may be used.

It should be noted that the disk reproducing apparatus of the present invention can be realized using an ordinary computer system without using a dedicated system. For example, a CD that can play a CD
A disk reproducing device that executes the above-described processing by installing the program for executing any of the above-described programs from a medium (floppy disk, CD-ROM, or the like) into a computer having a ROM drive or the like; Can be configured.

The medium for supplying the program to the computer may be a communication medium (a medium that temporarily and fluidly stores the program, such as a communication line, a communication network, or a communication system). For example, the program may be posted on a bulletin board (BBS) of a communication network and distributed via the network. Then, by starting this program and executing it in the same manner as other application programs under the control of the OS, the above-described processing can be executed.

[0061]

As described above, according to the present invention,
Each music recorded on a plurality of CDs or the like can be reproduced at an appropriate volume.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of a disc reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of disk information stored in a memory.

FIG. 3 is a flowchart illustrating a sampling process according to the embodiment of the present invention.

FIG. 4 is a flowchart for explaining a volume adjustment reproduction process according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing control part 2 Signal processing circuit 3 Spindle servo circuit 4 Optical pickup 5 Tracking thread servo circuit 6 DAC 7 Electronic volume 8 Key input part 9 Memory 10 Display part 11 Disk changer

Claims (7)

[Claims] 1. A reproducing means for reproducing music recorded on a recording medium at a predetermined recording level; a volume increasing / decreasing means for increasing / decreasing a reproduction volume when the reproducing means reproduces a music; Recording level acquisition means for acquiring the recording level of the music piece, recording level storage means for storing the recording level acquired by the recording level acquisition means, and the volume increasing / decreasing means according to the recording level stored in the recording level storage means. A disk playback device comprising: 2. A reproducing means for reproducing music recorded on a recording medium at a predetermined recording level, and a volume increasing / decreasing means for increasing / decreasing a reproduction volume when the reproducing means reproduces the music in accordance with a variable value owned by the reproducing means. Volume setting means for setting a target volume for playing a song; recording level acquiring means for acquiring a recording level of a song recorded on a recording medium; and a recording level acquired by the recording level acquiring means. The recording level storage means, the reproduction level of the music determined according to the recording level stored in the recording level storage means and the variable value of the volume increase and decrease means, the same as the target volume set by the volume setting means, A disk reproducing device comprising: a volume adjusting unit that adjusts a value of a variable value of the volume increasing / decreasing unit. 3. A multiple-disc disc reproducing apparatus capable of switching and reproducing a plurality of stored discs at any time, comprising: reproducing means for reproducing music recorded on a disc at a predetermined recording level; Volume means for increasing / decreasing the playback volume when playing back, a peak value acquisition means for acquiring a peak value of a recording level in a plurality of songs recorded on a disc, and a recording level acquired by the peak value acquisition means. A disk reproducing apparatus comprising: a peak value storage unit; and a volume adjustment unit that adjusts the volume unit according to a peak value of a recording level stored in the peak value storage unit. 4. A multiple-disc playback apparatus capable of switching and playing back a plurality of stored discs at any time, comprising: playback means for playing music recorded on a disc at a predetermined recording level; Volume means for increasing or decreasing the playback volume when playing back music according to its own variable value; volume setting means for setting a target volume for playing back music; and peak recording levels for a plurality of music pieces recorded on a disc. A peak value acquisition unit for acquiring a value, a peak value storage unit for storing a recording level acquired by the peak value acquisition unit, a peak value of a recording level stored in the peak value storage unit, and a variable value of the volume unit. The volume of the music piece is determined so that the reproduction volume of the music piece determined according to the above becomes equal to the target volume set by the volume setting means. Disk reproducing apparatus characterized by comprising: a volume adjusting means for adjusting the value, the. 5. The apparatus according to claim 3, wherein said peak value acquiring means acquires a maximum value of a detected recording level by sampling a plurality of music pieces recorded on a disk for a predetermined time. Or the disk reproducing device according to 4. 6. A reproducing step of reproducing music recorded on a recording medium at a predetermined recording level; a volume increasing / decreasing step of increasing / decreasing a reproduction volume of the music reproduced in the reproducing step according to a variable value; A recording level acquisition step of acquiring a recording level of a music piece recorded on a medium, and a variable value for increasing or decreasing the reproduction volume of the music piece in the volume increase / decrease step according to the recording level acquired in the recording level acquisition step. A volume adjustment step of adjusting a value, comprising: 7. A reproducing step of reproducing music recorded on a disk at a predetermined recording level, a volume increasing / decreasing step of increasing / decreasing a reproduction volume of the music reproduced in the reproducing step according to a variable value, A recording level acquisition step of acquiring the recording level of the recorded music, and a variable value for increasing or decreasing the reproduction volume of the music in the volume increasing / decreasing step according to the recording level acquired in the recording level acquisition step. A computer-readable recording medium in which a program for causing a computer to execute a volume adjustment reproduction method having a volume adjustment step of adjusting the volume is recorded.