JPH0336599A - Automatic player - Google Patents

Abstract

PURPOSE:To play only a specific part automatically by storing automatic performance music data and audio data together in the same data storage means and performing an automatic performance indication to a sound source means and a reproduction indication for the audio data to a reproducing means synchronously. CONSTITUTION:The automatic performance music data for the automatic performance indication and the audio data to be reproduced corresponding to the data are stored together in the data storage means such as one compact disk 105. When respective data are read out to make the automatic performance indication, the automatic performance music data, for example, is read out to a temporary storage means in advance to make a program search for the audio data and then the automatic performance indication to the sound source means and the reproduction indication for the audio data to the reproducing means are started synchronously, so that the automatic performance by the sound source means is carried out through easy operation while timing with the music of the audio data. Consequently, the performance advance state of a part of a specific instrument sound can be learnt.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention uses a storage medium in which audio data and musical note information are recorded to reproduce audio data and automatically perform music on a sound source means based on automatically performed music data. The present invention relates to an automatic performance device that synchronizes instructions.

[Conventional technology]

In conventional automatic performance devices for electronic musical instruments, automatically performed music data (note information) corresponding to the progression of a piece of music is stored in advance in a storage medium such as a semiconductor memory or magnetic tape, and this automatically performed music data is sequentially read. □The sound source is controlled according to the scale and length of each note.

In this case, in order to automatically perform a song consisting of parts by multiple instruments, the note information of each part must be stored in the storage medium, the data sequentially read out, and the sound source corresponding to each part controlled. become.

[Problem to be solved by the invention]

Here, there are cases where it is particularly desired to emphasize only the melody of a certain part and have it automatically played. This is useful if you want to learn the performance progress of a part using a specific instrument sound, compare the performance effects when replacing that instrument sound with another instrument sound, or compare the actual performance flow of multiple instruments. This is because there is a desire to know the performance status of the part, such as the timing at which the part is sounded.

However, the above-mentioned conventional automatic performance device using a storage medium that stores the entire score of a song composed of each part has a problem in that it is not possible to automatically perform only a specific part. . Furthermore, even if it is possible to distinguish between musical instruments for each part, a sound source for automatically playing each part is required, which is uneconomical.

On the other hand, if only the automatic performance song data for a specific part is stored in a storage medium from the beginning, and then read out and automatically perform only that part, only the melody of that part will be played, so multiple instruments In other words, it is difficult to understand the entirety of the song, which is made up of individual parts.In other words, it is difficult to understand the timing of the pronunciation of the parts you should play (learn) and the image of the entire song in the overall flow of the song based on the actual performance. The problem is that it is not understood.

To solve this problem, it is common practice to play a record or tape on which the entire song (for example, a full orchestra) has been recorded, and then start automatic performance at the same timing. However, there are problems in that it is difficult to ensure the timing between the reproduced sound and the automatic performance by manual operation, and it is very complicated to operate the record or tape reproducing apparatus at the same time.

An object of the present invention is to enable the operation of automatic performance and the reproduction of the corresponding music by simple operations, and to reliably synchronize the timing of automatic performance of a predetermined part in the reproduced music. There is a particular thing.

[Means to solve the problem]

The present invention first includes a sound source means for performing automatic performance based on automatic performance music data. The means includes, for example, an electronic keyboard instrument, an electronic string instrument, an electronic wind instrument, etc., each having a sound source using a PCM method, a waveform modulation method, an overtone addition method, an overtone subtraction method, or the like. Note that the sound source means may be connected to the outside of the main body via an interface such as MIDI. In this case, the present invention will operate as a sequencer.

Specifically, the automatically performed music data includes sound generation start instruction data, such as MIDI
A note-on message that is a message, time control data that controls the sound generation time, data that is specified using an exclusive message that is a MIDI message, and sound generation end instruction data that instructs the sound source to end the sound generation. For example, it includes a note-off message, which is a MIDI message. In addition, at the beginning of the automatically played music data, tone setting data, such as a program change message such as a MIDI message, that causes the tone generator to set the tone via the automatic performance control means is added before the start of the automatic performance instruction. include. The automatically performed music data in these cases is data for instructing automatic performance of a predetermined performance part (piano part, etc.) in, for example, an orchestral performance (ensemble performance).

Next, it has a reproducing means for reproducing audio data representing a song. The means is, for example, a compact disc player. Of course, it may also be a DAT (digital audio recorder) or the like. The audio data is, for example, minus one data indicating a music piece of a performance part other than the above-mentioned predetermined performance part.

It also has data storage means for storing a mixture of audio data and automatic performance music data.

The means is, for example, a compact disc. In this case, audio data is stored in an audio data area of a program area of the compact disc, and automatically performed music data is stored in a user's bit area of a subcode area of the program area. Further, in the same lead-in area, table of contents data for performing multi-heading of the audio data and automatically performed music data stored on the compact disc is stored. This is data that corresponds to the number of the first frame of each data.

Furthermore, automatic performance is performed in which an operation of reading automatic performance music data from the data storage means and instructing the sound source means to automatically perform the same, and an operation of reading audio data and causing the reproduction means to reproduce the audio data are synchronized. It has control means. The means also includes temporary storage means for temporarily storing automatically performed music data. In this case, the automatic performance control means reads in advance automatic performance music data to be automatically performed from the data storage means to the temporary storage means, and after locating the beginning of the audio data to be played back on the data storage means. , an automatic performance instruction to the sound source means and an audio data reproduction instruction to the reproducing means are started in synchronization, and then automatic performance instructions are sequentially given to the sound source means while sequentially reading automatically performed music data from the temporary storage means.

With the above configuration, when an automatic performance instruction and an audio data playback instruction are started synchronously as described above, for example, at the beginning of the automatically performed song data, the automatic performance control means is instructed to play back the audio data. Time control data may also be included in order to adjust the timing of the start of sounding the first musical tone to be automatically played.

Furthermore, for example, in the left channel of the audio data area of a compact disc, audio data that is first minus one data indicating a music piece of a performance part other than the first performance part (piano part, etc.) is stored. On the right channel, there is a second section that shows the music of the performance part other than the second performance part (violin part, etc.).
It may be configured such that audio data, which is minus one data of , is stored, and data for instructing automatic performance of the first and second performance parts is stored in the subcode area of the compact disc.

[For production]

In the present invention, automatically performed music data for issuing an automatic performance instruction and audio data to be reproduced in correspondence with the automatically performed music data are stored in a mixed manner in a data storage means such as a compact disc. In this case, for example, audio data can be stored in the audio data area, and automatically performed music data can be stored in the user's bit area of the subcode area, thereby allowing efficient data storage.

When reading each data from the compact disc or the like and instructing automatic performance, the automatic performance control means:
Automatic performance instructions to the sound source means and audio data reproduction instructions to the playback means are synchronously performed. That is, for example, automatic performance music data is read in advance into the temporary storage means, and after the audio data is cued, an automatic performance instruction to the sound source means and an audio data reproduction instruction to the playback means are started in synchronization. By doing this, it is possible to cause the sound source means to perform automatically in time with the music of the audio data with a simple operation.

Here, if time control data is included at the beginning of the automatically performed music data to cause the automatic performance control means to adjust the timing of the playback of the audio data and the start of the first sound of the automatic performance, the playback of the audio data can be performed. Automatic performance of a part whose performance starts after a certain period of time from the start can also be performed at the correct timing.

Furthermore, by including timbre setting data for timbre setting at the beginning of the automatically performed music data, it is possible to automatically set the timbre of the electronic instrument before starting an automatic performance instruction.

Furthermore, by storing audio data such as a minus one orchestral performance other than the piano part, and having the piano part automatically played along with the playback, it is possible to automatically perform the piano part with the orchestral performance in the background. You can get the same effect.

In addition, since audio data can be recorded in stereo on compact discs, etc., you can store different minus one part audio data in the left channel and right channel, and automatically play songs for each part corresponding to the sub chord area. By storing the data, you can enjoy automatic performance of two musical instruments.

〔Example〕

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

(Configuration) FIG. 1 is a block diagram showing the overall circuit configuration of an exercise training/automatic performance device 1 equipped with an electronic keyboard instrument and a compact disc player, which is an embodiment I of the present invention.

In addition to playing a normal compact disc (hereinafter abbreviated as CD), this exercise training/automatic performance device can also play audio data of a song excluding the piano part, for example, in the L channel of the audio data area of the CD. For example, audio data of the same song except for the violin part is recorded in each channel. Furthermore, automatic performance data for the piano part and automatic performance data for the violin part of the song are recorded in the subcode area of the CD.

For example, when you want to practice the piano part of a song, or when you want to have the melody of that part played automatically on an electronic keyboard instrument, you can play the CD by pressing keys in advance.
is played back, the automatic performance song data of the piano part of the subchord is read, and it is temporarily stored in the automatic performance memory.

Then, the data in the same memory is sequentially read out, and the LED on the keyboard lights up or automatic performance is performed according to the data.At the same time, the audio data of the L channel song excluding the piano part of the song is read out. It is possible to perform synchronized playback on the CD side. Note that the automatically performed music data for the sub-chord also includes timbre specification data, and is automatically set to the piano timbre.

The same is true when you want to practice the violin part of that song, or when you want to have the melody of that part automatically played by an electronic instrument.In this case, at the same time, the audio data of the R channel song excluding the violin part of that song is
Synchronous playback can be performed on the D side.

The electronic keyboard instrument is an electronic musical instrument with a PCM sound source.
Normal manual performance is also possible using the tone data stored in the waveform memory.

In FIG. 1, the area surrounded by a dashed line 100 is the CD
Player section (hereinafter referred to as CD player section 100)
, a portion surrounded by a dashed line 200 is an electronic keyboard instrument section (hereinafter referred to as electronic keyboard instrument section 200).

First, the block configuration of the CD player section 100 will be explained.

The CD 105 is a compact disc, and is played by being set in a holder (not shown) of the CD player 100. In addition, in this embodiment, the CD player unit 100 has recorded thereon, in addition to a compact disc for playing normal audio data, minus-one performance music data, automatic performance music data, etc. that are particularly related to this embodiment. Compact discs can be played. In the following description, when referring specifically to the latter compact disc, CD-MI D1105
In normal explanation, it is simply called CD105.

The TOC memory lO1 is the lead-in area T read out when the CD 105 is set.

This is a memory that stores C data. The TOC data will be described later.

The CD control section 102 is, for example, a microprocessor, and controls the entire CD player section 100, and controls the subcode signal processing path 110, the musical instrument control section 201, and the T.
Exchanges various data with the OC memory 101, etc.
Also, when driving the CD 105, the disk servo circuit 1
03 and the pickup servo circuit 104, a drive control signal is output. Furthermore, during guided performance/automatic performance, the selection circuit 115 is controlled to select the minus one performance data recorded in either the L channel or the R channel, and when reading the automatic performance music data, the analog selection circuit 115, which will be described later, is controlled. Switch (SW) 112 is turned off to mute the reproduced sound.

The disk servo circuit 103 controls the rotation speed of the disk motor 106 that rotationally drives the CD 105.
Linear velocity of each track of D105 (Linear Vel
ocity) is controlled to be constant.

Further, the pickup servo circuit 104 performs focus servo and tracking servo for the optical pickup 107 that irradiates each track of the CD 105 with a laser beam. The above focus servo is the same as the above laser.
The focus error is detected from the state of the reflected light of the beam, and based on the focus error, the objective lens in the optical pickup 107 is controlled and driven in the optical axis direction. While detecting the deviation of the laser beam, the laser beam irradiated from the optical pickup 107 is
Optical pickup 1 is controlled and driven in the radial direction of D105.
This is to control the laser beam irradiated from 07 to accurately irradiate the center of the track of CD 105.

Here, protrusions called pits are carved on the side of the CD 105 that is irradiated with the laser beam, and PCM signals (digital signals) are recorded by these protrusions. The optical pickup 107 detects the presence or absence of a pit based on the amount of reflected light from the irradiated laser beam, and outputs an electric signal corresponding to the presence or absence of the pit and its length to the demodulation circuit 108.

The demodulation circuit IO8 detects a frame synchronization signal from the electrical signal output from the optical pickup 107, and as will be described in detail later, identifies the delimiter and order of each symbol word (audio data and subcode), and also identifies the delimiter and order of each symbol word (audio data and subcode). The EFM-modulated 14-bit symbol words (subcodes, audio data, etc.) in the data are EFM demodulated and converted into the original 8-bit symbol words. Then, the audio data of the EFMillied symbol words is outputted to the audio data signal processing circuit 109 and the subcode is outputted to the subcode signal processing circuit 110.

The audio data signal processing circuit 109 inputs audio data to an internal RA (not shown).
M (Random Access Memory), error correction processing is performed based on the Reed-Solomon code, and decreep processing is performed to restore each sample of 16-bit digital audio data in frame units. Then, each of these sample data is output to the selection circuit 115.

The selection circuit 115 selects either the L channel or the R channel audio data based on an instruction from the CD control unit 102 and outputs it to the D/A converter (digital/analog converter) 116 .

The D/A converter 116 includes an LPF (low pass filter) 1 having a cutoff frequency of A, which is the sampling frequency.
11, it converts input 16-bit digital audio data into a corresponding analog signal and outputs it to an analog switch (SW) 112.

The analog switch 112 is on/off controlled by the CD control unit 102, and the analog audio signal output from the LPF III is externally transmitted via the amplifier 113 and the speaker 114 when the analog switch 112 is on. is emitted.

The subcode signal processing circuit 110, as described later,
The 8-bit subcode containing the IDI message is subjected to error detection and correction processing, as well as deinterleaving processing, in the same manner as the audio data signal processing circuit 109, and the subcode is restored. Outputs two control pits P and Q out of the subcodes generated to the CD control unit 102, and outputs the remaining R, S, T, U,
■、W's six user's bits in the electronic keyboard instrument section 20
Output to the musical instrument control section 201 in 0.

Next, the block configuration of the electronic keyboard instrument section 200 will be explained.

The musical instrument operation unit 202 has a configuration shown in FIG. 2. That is, part designation keys 2024 and 2025 select part performance data from A-vert and B-bert. A music designation key 2026 is used to designate a music during guided performance or automatic performance. The data read key 2027 instructs to read the automatically performed music data of the subcode. Guide start key 2
028 instructs the start of the guide performance. Autoplay start key 202. indicates the start of automatic play. Minus one start key 202. . instructs to play minus one. The timbre specification key 202++ specifies the timbre of a musical tone. In addition, it has a keyboard 2021 consisting of a plurality of keys 202□ as a keyboard function, and an LED 202 above each key 2022 as a guide performance function.
It has 3. Although not specifically shown, there are switches for playback functions such as PLAY and STOP provided in ordinary CD players, switches for pause function, and special functions such as random memory song selection. It also has switches etc.

Next, returning to FIG. 1, the musical instrument control section 201.

For example, it is a microprocessor, and monitors the operating states of various keys, etc. (FIG. 2) of the musical instrument operating section 202 at predetermined time intervals. Then, pitch information corresponding to the pressed key 2022 is set, and timbre information (program number) specified by the timbre specification key 202■ is set. In addition, the CD control unit 10 performs processing for guided performance/automatic performance and processing for normal CD operation, which will be described later.
Control instructions are given to 2.

The guide lamp drive circuit 214 controls the L of the musical instrument operation section 202 based on the control from the musical instrument control section 201 during guided performance.
Controls the light emission of the ED2023 (Fig. 2).

The waveform memory 203 is a ROM (ROM) in which waveform data of various musical tones are digitally encoded and stored in advance using the PCM method.
A read-only memory), an address counter for accessing the ROM, and first and second address registers for setting the initial value and cumulative value of the counter.

The instrument control unit 201 transfers pitch information set based on key press operations or note-on instructions during automatic performance to the scale control circuit 204, and transfers pitch information set based on key press operations or note-on instructions during automatic performance to the scale control circuit 204. Tone color information (program number) set based on the program change instruction is output to the tone control circuit 205.

The timbre control circuit 205 sets the start address of the storage area in the waveform memory 203 in which the waveform data of the timbre corresponding to the program number input from the musical instrument control section 201 is stored, to the first address in the waveform memory 203 (not shown). Set to address register 1.

Further, the scale control circuit 204 sets an address interval corresponding to the pitch information added from the musical instrument control section 201 to a second address counter (not shown) in the waveform memory. Then, an address counter (not shown) in the waveform memory 203 sequentially accumulates the waveform from the first address set in the first address register to the address interval set in the second address register. Accessing the ROM in the memory 203 and reading out the instantaneous value of the waveform data of the tone corresponding to the set tone information (program number) from the memory, and
The waveform data read from the waveform memory 203 is output to the envelope control circuit 206.

Furthermore, when the instrument control unit 201 detects a key press operation or a note-on instruction of automatically performed music data, it outputs a note-on signal and velocity data corresponding to the key press speed to the note-on/off control circuit 207. However, when a key release operation or a note-off instruction of automatically performed music data is detected, a note-off signal and off velocity data corresponding to the key release speed are output to the eed on/off control circuit 207.

Note on/off control circuit 207 is connected to musical instrument control section 201
The envelope control circuit 206 is controlled based on the note on/off signal and velocity data applied from the envelope control circuit 206, or the off velocity data, and the envelope corresponding to the velocity data and the off velocity data is sent from the envelope control circuit 206. Output.

That is, the envelope attack time is controlled in accordance with the velocity data, and the envelope release time is controlled in correspondence with the off velocity data.

The envelope control circuit 206 generates envelope data of a predetermined shape in response to the control signal applied from the note on/off control circuit 207, and multiplies the envelope data by the waveform data applied from the waveform memory 203. Then, the multiplied value is transferred to a D/A converter (digital/
Analog converter) Output to 20B.

D/A converter 208 and LPF (low pass filter) 2 having a cutoff frequency of % of the sampling frequency
09 converts the input waveform data subjected to the envelope control (the multiplication value) into an analog waveform signal corresponding to the waveform data. This converted output is then emitted to the outside via an amplifier 210 and a speaker 211.

Furthermore, the musical instrument control section 201 controls the subcode signal processing circuit 1.
Converts the 6-bit R-W data (described later) input from 10 into an 8-bit MIDI message, and converts it into an 8-bit MIDI message.
IDI messages are stored in RAM (Random Access
s Memory) etc. to the automatic performance memory 212.

The MIDI message written to the automatic performance memory 212 is automatically performed music data stored in the subcode of the CD 105, as will be described in detail later, and is
02 song specification key 2026 and data read key 202
This is a MIDI message of automatically performed music data selected by No. 7.

Although not specifically shown, the timer circuit 213 includes a time counter, a buffer for tone length data, a comparison circuit, etc., and based on the MIDI message stored in the automatic performance memory 212, This circuit measures the time corresponding to note length data when performing guided performance or automatic performance.

(Former on CD) Next, the recording format of digital data on the CD 105 will be explained.

When recording/playing digital data on a CD, 2
Two important operations take place. That is, error correction and modulation (and decoding 11).

Error correction refers to defects in recording media and optical pickup 107.
This process is performed by the audio data signal processing circuit 109 shown in FIG. be done.

Modulation, when handling digital data on a certain medium, refers to the process of converting it into an electrical signal waveform suitable for recording and reproducing on that medium.When recording digital data on a CD, the EFM modulation method described later is used. Ru. Demodulation is a process for restoring original digital data from a modulated signal read from the medium, ie, a CD, and is executed by the demodulation circuit 108 in FIG.

Depending on the above two operations, error correction and modulation, C
The recording format of digital data in D105 is determined. FIG. 3 shows the recording format of digital data to be recorded on the CD 105 in this embodiment.

As shown in the figure, digital data is recorded in units called frames, and from the beginning of each frame,
24 channel bit sync pattern (synchronization pattern)
301, subcode for l symbols 302. Audio data for 12 symbols 303. Parity word for 4 symbols 304. Audio data for 12 symbols 3
Parity words 306 for 0.5.4 symbols are arranged.

In the frame-format data string, before EFM modulation, which will be described later, is performed, the l symbol in FIG. 3 is composed of 8-bit data. On the other hand, the audio data to be recorded on the CD 105 is sampled at 44.1 K)Iz and 16
It is digital data quantized in bits. Therefore,
One sample is represented by two symbols. As described above, a total of 24 symbols of audio data 303, 305 are recorded in one frame in FIG. 3, so a total of 12 samples of audio data are recorded in one frame. Note that the subcode 302 will be described later.

Audio data for the above 12 samples 303.305
As shown in FIG. 3, parity words 303 and 306 for a total of eight symbols are added.

This is a code added to correct data errors in frame units, and is determined by the audio data signal processing circuit 109 using the parity words 304 and 306 during playback in the CD player section 100 in FIG. By doing this, data errors within each frame are automatically corrected.

Here, a total of 24 symbols, that is, a total of 12 samples of audio data 303 recorded in one frame in FIG.
．． 305 does not record temporally continuous samples of audio data. This is due to the following reasons.

In the above parity word error correction, -C
If the number of data errors within one frame exceeds a certain number of bits, correction cannot be performed.

In particular, on CD discs, large data errors tend to concentrate locally due to scratches, dirt, etc.
In many cases, it cannot be corrected by simply reproducing, even if the parity word is added.

Therefore, the order of each sample of the audio data 303 and 305 is dispersed among the audio data in multiple consecutive frames (for example, 108 frames maximum) according to a certain rule, and recorded on the CD disc, so that the order of each sample is the same during playback. By rearranging the discs in the original order according to the rules, concentrated errors on the CD disc can be dispersed during playback, and error correction using parity words can be easily performed. The above arrangement during recording is called interleaving, and the arrangement during playback is called deinterleaving. In this embodiment, when recording digital data in frame units, recording is performed while performing this interleaving, so a total of 12 samples of audio data 303 are stored in one frame in FIG.
．． 305 means that data that is scattered and scattered is recorded. In addition, parity word 304
．． 306 is incremented together with audio data 303 and 305, and only that portion of subcode 302, which will be described later, is independently incremented.

In this embodiment, the parity word 304 .
As 306, a parity word called CIRC (cross-interleaved Reed-Solomon code), which is generally used for recording/reproducing CDs, is used. Cross interleaving is performed by dividing the above interleaving into multiple stages, and interleaving (sometimes called scrambling)
A parity word is added to the output, and the data string containing the parity word is further interleaved.
It is also a method that performs the process of adding parity words in multiple stages. This improves the ability to correct data errors, and in this case, by using a special parity word called a Reed-Solomon code, it is possible to exhibit even better error correction ability.

When reproducing the signal recorded on the CD 105 of FIG. 1 in this manner, a de-interleaving process that is completely opposite to that at the time of recording is performed to reproduce the audio data 303 and 305. This processing is executed by the audio data signal processing circuit 109 in FIG.

Next, as explained above, before modulation is performed, one symbol in FIG. 3 is 8 bits, but the data cannot be recorded on a CD disc in this data format.

That is, in digital data framed as shown in FIG. 3 (including subcode 302 described later), the logic rlj and logic "0" of each bit constituting each symbol
We do not know what probability this will occur in −S.

The optical pickup 107 in FIG.
When detecting digital data as an electrical signal from the upper bit, if either logic "1" or 'OJ' continues for a long time, a DC component will occur and the bit interval information will be interrupted. Here, the pickup servo circuit 10 of FIG.
In the above-described focus servo and tracking servo processing in Section 4, a signal called an error signal is generated and used, and this error signal is extracted from the output of the optical pickup 107, which is the main signal. and,
If this error signal contains many low frequency components, especially DC components, stable servo cannot be applied. Also,
The demodulation circuit 108 in FIG.
A synchronized clock is generated from the output of 7 to perform reproduction processing of digital data, but if the bit interval information is interrupted as described above, this clock cannot be generated.

Therefore, in order to remove this DC component as much as possible,
Generally, when recording on a CD disc, a modulation called EFM modulation is performed. In EFM modulation, for the 8-bit data pattern of each symbol in Figure 3, ``2 or more and 10 or less O's exist between bits l and 1'' from among the 14-bit arbitrary data patterns. The 8-bit pattern is replaced with the 14-bit pattern. Furthermore, 3-bit connection bits are inserted between the 14-bit patterns. The linking bits have the role of ensuring that the above-mentioned conversion criteria are followed when the 14-bit patterns are linked.

Through EFM modulation as described above, each 8-bit symbol word in the frame-by-frame digital data shown in FIG. 3 is converted into 17-bit data and recorded on a CD disc. In order to reproduce the EFM modulated signal recorded on the CD 105 of FIG. 1 in this manner, demodulation processing that is completely opposite to that described above may be performed, and this processing is performed in the demodulation circuit 108 of FIG.

Here, the 24 channel bit sync pattern 301 in FIG. 3 itself is not interleaved or modulated, and the CD 10
It is added at the end after interleaving and modulation are performed when recording digital data to 5. The same pattern is a signal used to synchronize the frame shown in FIG. 3 during demodulation in the demodulation circuit 10B, that is, to identify the start of a frame, and is never generated in other signals 302 to 306. A pattern is used.

Next, as digital data recorded on a CD disc, in addition to the audio data 303 and 305 shown in FIG. 3, there is a data area called a subcode of 8 bits per symbol per frame. FIG. 4 shows a data format centered on the subcode 302. Each bit of the 8-bit subcode 302 is P, Q, RSS, T, U.
, V, and W. And, as shown in the same figure,
The 8-bit subcode is assembled in units of 98 frames, and each 8-bit subcode in the Oth frame and the first frame of these 98 frames is used as a sync pattern for the subcode, and the subcode signal in FIG. Processing circuit 1
10 (described later) is a frame recognition pattern for identifying subcode information P to W of the second frame to the 97th frame.

Then, from the 2nd frame to the 97th frame, P, Q
is standardized as a control bit. This area is used for system control in normal CDs.

That is, the control bit P is data indicating between a song or during a song, and if the frame corresponds to an inter-song and there is no audio data 303 or 305 (Figure 3), it is 1, and if the frame corresponds to an inter-song and there is no audio data 303 or 305 (Fig. 3), it is 1; If it exists, it is set to O. The control bit Q consists of the 96 bits from the 2nd frame to the 97th frame, and includes the track number on the CD, the number of frames of the subcode, time information (minutes, seconds) from the beginning of the song, and information about the time from the beginning of the CD. absolute time, absolute number of frames,
and error detection code (CRC code) for each of the above information.
represents data such as Therefore, each of these pieces of information is updated every 98 frames (approximately every 1775 seconds), and the CD shown in FIG.
The control unit 102 accesses music selection and displays music information by reading this information via the subcode signal processing circuit 110.

As will be described later, information called TOC, which corresponds to the table of contents of one CD disc, is stored in the lead-in area on the CD disc.

Bit R-W is called a user's bit, and its use for still images, etc. has already been devised. In this embodiment, as will be described later, this user's bit is
Usical Instrument Digital
Interface) data is recorded. Here, among the 98 frame units in FIG. 4, in the user bits R-W of the subcodes of the second to 97th frames, as shown in FIG. 5, 96 symbols (in this case, one symbol is R- (consisting of 6 bits of W) is called a unit called a packet, and each packet is assembled so as to contain 4 packs of data in a unit called a pack for 24 symbols.

The data format of each pack (24 symbols) is shown in Figure 6. In the 0th to 23rd symbols of R-W, the upper 3 bits of the O-th symbol are called "Mode J", and this pack It shows the major classification of what data the data represents, and the lower 3 bits are called "items" and show the subclassification of the pack data. The first symbol indicates hardware operation information of the decoder. Then, data is entered in the 4th to 19th symbols. Further, an error correction code is added in units of packs, and parities Q+1 and Q+ are added to the second to third symbols, and parity Pa''''P3 is added to the 20th to 23rd symbols.

Parity Qo, Q+ is G for the second to third symbols.
The (4,2) Reed-Solomon code of F(2'), parity Po=P3 is 0F(
2′) is a (24,20) Reed-Solomon code.

As can be seen from this configuration, when recording the subcode 302 (Fig. 3) on a CD disc, the user's bit R
-W, an error correction code is added on a back-by-back basis, and the same interleaving as in the case of the audio data 303, 305 (FIG. 3) described above is performed on a back-by-back basis. Then, as described above, CD10 in FIG.
When reproducing a signal recorded in 5, first, the demodulation circuit lO8 of FIG. 1 performs demodulation of the EFM modulation described above and identifies the frame structure of FIG. 3.

Of these, the subcode 302 portion is extracted and sent to the subcode signal processing circuit 110 in FIG. In this circuit, de-interleaving is performed on a pack-by-back basis, and error correction is performed using parity Qo, Q+, Po-P3 shown in FIG. is extracted.

In this embodiment, using the above pack format, MI
Record DI data. The specific format is shown in FIG. 7. First, the top 3 of the Oth symbol
The "mode" of the bit is 3, which indicates CD-MIDI.
A 3-bit code indicating that automatically performed music data is recorded as MIDI data is stored as the bit code and the lower 3-bit "item". 1st
The symbol "Instrafushiran" is used when the electronic keyboard instrument section 200 has a function of automatically reading and sampling audio data from a CD according to the instruction code in the MtD1 message, for example. The CD player section 100 indicates that the command is given.
However, this embodiment does not have such a function, so all general codes are
o" is set. MIDI messages, which will be described later, are recorded in the fourth to nineteenth data fields.

FIG. 8 is a diagram conceptually showing the recording state of the audio data and automatic performance music data used in this embodiment on the CD 105 (see FIG. 1).

As explained in FIG. 3, each of the above data is recorded in units of frames, and is recorded from the inner circumference of the CD 105 toward the outer circumference.

Then, the innermost area of the disk (with a diameter of 461 m1 ~
50m area) is called Lee, Doin area 401,
Among the data recorded in this area in units of frames in FIG. 3, TOC (Table
Information corresponding to a table of contents for one disc is recorded. An example of the format of this TOC is shown in FIG. 9, which will be described later.

Furthermore, in a program area 402 following this lead-in area 401, audio data 40, which is main data, of the data recorded in units of frames in FIG.
3 (recorded in the formats 303 and 305 in FIG. 3), for example, song data for three songs is recorded.

- In the case of a boat fishing CD, audio data can be recorded in stereo on the L channel and R channel, but in this embodiment, audio data 4031A to 4033^ and 403I to 403■ are recorded independently on the L channel and R channel, respectively. It is recorded, and when playing back, one of LR is selected and the sound is output. That is, in the L channel of the first song, for example, audio data 403IA of a song performed by an orchestra excluding the piano part is recorded. This is called minus A audio data, where A represents the piano. Similarly, the R channel of the first song contains audio data 4 of the song excluding the violin part, for example.
03+++ is recorded. This is called minus B audio data. In this case, B represents the violin, which is a plurality of parts, and in this example, audio data for three songs 403IA, 403ra, 403za and 403z.
a, 403ia and 40331 are recorded.

Also, in the program area 402, among the data recorded in frame units in FIG.
4 (recorded in the format shown in Figure 3 302), automatic performance music data 4 for three songs of A-bert (piano), which is subtracted from the L channel audio data.
04I^, 4042^ and 4043^, and the B bart (which is subtracted from the R channel audio data)
404 automatic performance song data for 3 songs (violin),
404zm and 404■ are recorded. These automatically performed music data are read out by the electronic keyboard instrument section 200 of FIG. 1 and are provided for automatic performance.

Next, the TOC will be explained again using FIG. 9. As you can see from the same figure, Figure 8 Nori-German Area 401
The TOC data recorded as subcode data 404 is the audio data 4031A to 4033^, 403 recorded in the program area 402 of FIG.
~403zm, and each automatic performance song data 404I^~
The starting frame numbers of 4043^ and 404th to 404■ are recorded. Here, program area 4
Since a frame number is uniquely determined at each position on the disk on 02 from the inner circumference to the outer circumference, the position of each audio data and automatically performed music data in the program area 402 is determined as its first frame number. 5, thereby, as will be explained later, C in Fig.
When accessing each of the above-mentioned data on the disk, the Dlllil unit 102 can access any data by first referring to the TOC data.

In this way, each audio data and automatically performed music data on the disc can be managed by the TOC. Therefore, the audio data for each song can be recorded in the audio data area (303 and 305 in Figure 3) regardless of the order of the songs, and the automatically played music data for each song can also be recorded in the subcode data area. (302 in FIG. 3) allows recording regardless of the song order and without the need to synchronize with the corresponding audio data.

FIG. 10 shows the M, IDI message used in this embodiment. A MIDI message according to the MIDI standard is composed of 1 byte and 8 bits, which is composed of a plurality of bytes, and is composed of a status byte indicating the type of message and its data byte. 1. First, in this embodiment, note-on message 501, note-off message 502, and program change message 503 are used as voice messages.

Note-on message 501 is a command corresponding to the action of pressing a key (202+ in Figure 2) on an electronic keyboard instrument, and the status is "9X" (expressed in hexadecimal notation: X indicates the MIDI channel). ), the first byte of data 1 is the note number 5011, and the second byte of data 2 is the velocity 5012. 1st during guide performance
When the musical instrument control section 201 shown in the figure reads out the message 501 from the automatic performance memory 212, the same control section issues an instruction to the guide lamp drive circuit 214 to select the key 2022 shown in FIG. 2 corresponding to the note number 5011 of the same message. Turn on the upper LED 2023.

Also, when the instrument control unit 201 reads the message 501 during automatic performance, the control unit reads the note number 501 of the message. scale control circuit 204 as pitch information.
Set to . As a result, the waveform memory 203 is accessed as described above, and reading of the corresponding waveform data is started. Along with this, the musical instrument control section 201 controls the note-on signal and the velocity 5 of the message 501.
01z is output to the note on/off control circuit 207.

As a result, the control circuit controls the envelope control circuit 206 as described above, an envelope is added to the waveform data output from the waveform memory 203, and sound generation is started.

Note-off message 502 in FIG. 10 is a command corresponding to the action of releasing a key (202+ in FIG. 2) in terms of an electronic keyboard instrument, and the status is "8X" and 1
Byte-th data l is note number 502+2
Byte 2 data is off velocity 5022. When the instrument control unit 201 in FIG. 1 reads the message 502 from the automatic performance memory 212 during guided performance,
The control unit issues an instruction to the guide lamp drive circuit 214, and instructs the i! Turn off the LED 2023 on 202z.

Further, when the musical instrument control unit 201 reads the message 502 during automatic performance, the control unit outputs a note-off signal and an off-velocity 5022 of the message 502 to the note-on/off control circuit 207. As a result, the control circuit changes to the envelope control circuit 2 as described above.
06, thereby adding a release envelope to the waveform data output from the waveform memory 203, and starting an operation toward silencing. Then, at the timing when the amplitude of the musical tone becomes O, the musical instrument control section 201
The notes and notes of the same message are sent to the scale control circuit 204.
Delete number 502+. As a result, reading of the corresponding waveform data from the waveform memory 203 is stopped.

Program change is performed using the tone specification key (Fig. 2 202□
), the status is "CX", and it has a program number as 1-byte data (data 1).

The instrument control unit 20 in FIG. 1 during guided performance or automatic performance.
1 reads the message 503 from the automatic performance memory 212, the control section outputs the program number 503+ to the tone control circuit 205. As a result, as described above, the timbre control circuit 205 sets the start address of the storage area in the waveform message 203 in which the waveform data of the timbre corresponding to the program number is recorded to the first address in the waveform memory 203 (not shown). Set to address register 1. As a result, during guided performance, the player can perform manual performance using that tone, and during automatic performance, automatic performance is performed using that tone.

Next, in this embodiment, a special command is assigned as an exclusive message exclusively for CD-MIDI.Originally, an exclusive message is a message exclusively for the manufacturer whose ID code is registered, but in this embodiment, In order to perform special control for CD-MIDI, the ID code for CD-MIDI is
D is newly defined and tone length control commands are defined. In other words, as tone length control commands, the status rFo and the end
10504+ for rCD-MI DI as shown in Figure 10 between "Off Exclusive rF7" (BOX)
J, ``tone length control command code 5042J,'' and ``tone length data 504z,'' which are several bytes worth of data. When the musical instrument control section 201 in FIG.
3, the tone length data 5043 is sent. Timer circuit 21
3, when the elapse of time corresponding to the tone length data 5043 is detected, a -defeat signal is output to the musical instrument control section 201. As a result, the musical instrument control section 201 controls the automatic performance memory 212.
As a general rule, the following data is stored in the notebook/
The off message is read and the note off operation described above is performed. - This is an example of a monophonic system, but in the case of a polyphonic system, a note number may be entered in the note length control command 504, and the note length of that note number may be controlled.

FIG. 11 shows an example of data for one song recorded in the subcode 404 of the disc in FIG. 8 (corresponding to 4041A etc. in the same figure), using the above-mentioned MIDI message for CD as automatically performed music data. ) is shown.

At the beginning, program change p+ (5 in Figure 10)
03) is included. During guided performance or automatic performance, when this message is read from the CD 105 in FIG. 1 based on the control operation described later and is given to the instrument control unit 201 from the subcode signal processing circuit 110, the control unit performs the following operations as described above. Then, the program number (see 503 in FIG. 10) is sent to the timbre control section 205, where a predetermined area in the waveform memory 203 is designated and the waveform of the corresponding timbre is designated.

From this point on, data is included to turn on the LED 2023 (Figure 2) or perform automatic performance based on the guide performance, and these data are used at the start of the guide performance or automatic performance as described later. The signal is transferred from the subcode signal processing circuit 110 to the automatic performance memory 212 via the musical instrument control section 201.

After that, while the musical instrument control section 212 reads out the automatic performance music data stored in the automatic performance memory 212 one by one,
Execute guided performance or automatic performance.

First, the first tone length control command 12o is for time adjustment. In other words, in an orchestral performance, for example, it would be fine if the piano part, for example, started from the beginning of the performance, but there are cases where it starts from the middle. In this case, minus A audio data (4031A in Figure 8)
It is necessary to synchronize the playback of the music (e.g.) with the guided performance or automatic performance based on the automatic performance music data (404I^, etc. in FIG. 8) stored in the automatic performance memory 212. Therefore, for example, this tone length control command io is used to count the time until the performance of the piano part starts. When reading automatically performed music data from the automatic performance memory 212 shown in FIG.
Since this tone length control command 10 is stored at the beginning,
Musical tones have not yet begun to be produced. When the timer circuit 213 detects the time corresponding to the note length data (see 5043 in FIG. 10) of the same command, the next note-on message nol is read out. This results in
Even if the piano part starts in the middle, it can be reliably synchronized with the playback sound of the audio data. In addition,
If the piano part has started from the beginning, this initial tone length control command 16 is not necessary. These actions are
For example, orchestra performance and automatically performed music data 4041 based on minus B audio data 403+e in FIG.
The same is true for guided performance or automatic performance of a violin part, for example, by R or the like.

Next, in FIG. 11, a set of data including a note-on message, a tone length control command, and a note-off message follows. That is, nol, 11 and nf, or no2, 12 and nfz, etc. Based on these control data, the musical instrument control section 201 shown in FIG. 1 controls guided performance or automatic performance as described above.

At the end of the part song, stop message stp
is read out. Thereby, the musical instrument control section 201 returns from the guided performance or automatic performance mode to the normal mode.

(Saturday: 14■Kanshoku Shoju) FIGS. 12 to 17 show flowcharts of operations when each key in FIG. 2 is operated in the musical instrument operation section 202 in FIG. 1. These operational flows are mainly performed by the musical instrument control section 201. in FIG. This is executed jointly by the CD control unit 102, the subcode signal processing circuit 110, the audio data signal processing circuit 109, and the like. Further, an example of key operation is shown in FIG.

Each key operation will be explained below. In addition, Figures 12 to 17
The operation flowchart shown in FIG.
Or a part (subroutine) during which the CD control unit 102 executes a main operation flowchart that is not particularly illustrated.
is executed as

First, in the CD player section 100 of FIG.
When the No. 05 disc is set, its operation is detected by a microswitch (not shown) for disc set detection, and a detection signal is input to the CD control section 102. Thereby, the CD control section 102 rotates the disk motor 106 via the disk servo circuit 103. Then, only the TOC portion of the lead-in area (see 401 in FIG. 8) on the inner circumference of the CD 105 is read by the optical pickup 107, and the TOC data is extracted from the demodulation circuit 108 by the subcode signal processing circuit 110.
The data is stored in the TOC memory 101 as a cue table via the CD control unit 102. The above operation is the 12th
This is shown by the SI processing in the operational flow of the figure.

Next, a case where the key operation shown in FIG. 18(a) is performed will be described. This is an example of an operation when performing a guide performance.

In this case, first, in the instrument control unit 201, rl is pressed as the music designation key 2026 in FIG. By recognizing that the button has been pressed, instruction data for reading the automatically performed music data of the first A-vert song is transferred to the CD control section 102.

Upon receiving this, the CD control unit 102 executes the operation flow shown in FIG. 13.

First, in S2, from the TOC data stored in the TOC memory 101 of FIG. 1 as shown in FIG.
The first frame number of Bart's subcode is read. Subsequently, the pickup servo circuit 104 is controlled,
Cueing is performed by moving the optical pink-up 107 to the first frame position. This allows the CD
The automatic performance music data 404IA of the A part of the first song recorded on the optical pickup 105 as shown in FIG.
7 is read by the subcode signal processing circuit 110 via the demodulation circuit 108.

Next, the automatically performed music data 4041^ read as described above is transferred from the subcode signal processing circuit 110 to the musical instrument control section 201 at Sl.

Along with the above operation, the CD control unit 102 performs the following in S4:
The TOC data (FIG. 9) on the TOC memory 101 is accessed again and the first frame number of the minus A audio data of the first song is read.

As a result, the pickup servo circuit 104 is controlled, and the optical pickup 107 is moved to the above-mentioned first frame position, thereby locating the beginning of the minus hole audio data 4031^ of the first track recorded as shown in FIG. . As a result, the minus A audio data 4031A of the first song becomes ready for immediate playback.

As described above, the first
The musical instrument control section 201 shown in the figure executes the operation flow shown in FIG. 14.

First, in S, the first program change message Pa of the automatic performance song data sent as shown in FIG. 11 is executed, and the tone corresponding to the A part of the first song is is specified. For example, a piano tone.

Next, at S, among the automatic performance music data sent as shown in FIG. 11, the data after the program change message Po is stored in the automatic performance memory 2 of FIG.
12 is stored. As a result, the electronic keyboard instrument section 200
becomes ready for guide play.

Next, the musical instrument control unit 201 recognizes that the guide start key 2028 in FIG. 2 has been pressed to instruct guide performance as the key operation in FIG. 18(a), and executes the operation flow in FIG. Execute.

First, in S, a flag FLGI indicating that automatic performance is in progress is set.
is set to 1.

Next, at S, a CD playback instruction is given to the CD control section 102 of FIG. 1, and at the same time, a flag FLG2 indicating that the CD is being played is set to 1.

Upon receiving the above instruction, the CD control unit 102 performs the steps 5 in FIG.
4, the reproduction of the minus A audio data 4031^ (see FIG. 8) of the first song, which has been cued in advance, is started.

Subsequently, since FLGI is 1, the judgment of 59 in Fig. 15 is Y.
If the result is ES, the process proceeds to 31G (described later in the case of No), and automatically performed music data following the tone length control command io shown in FIG. 11 is sequentially read out from the automatic performance memory 212.

If the read automatic performance song data is not a stop message (Fig. 11, 5up), the judgment of S is No (described later if YES), and the process proceeds to 512, where the first song, Bart A. (piano part) guide performance is performed as described above.

Next, since FLG2 is 1, the determination in 514 is YES (described later in the case of NO), and the process proceeds to S15. It is determined whether or not a signal indicating that the reproduction of has been completed is detected. Initially, this determination is NO, so the process proceeds to S.

At S, it is determined whether both FLGI and FLG2 are O, that is, whether both guide performance and CD playback have ended. At first, this judgment is NO, so it returns to S,
The guide performances of S, to S1□ are repeated.

In the above operation, S. , the stop message s in FIG. 11 is transferred from the automatic performance memory 212 in FIG.
When ap is read, the judgment of SL+ becomes YES,
At S13, the flag FLGI is reset to O, and the automatic performance ends. In this case, if the playback of the audio data in the CD player section 100 of FIG.
A loop of s -5I 7-5 q→S14 is repeated, and only CD playback is executed. Then, when a signal indicating that the reproduction of the minus A audio data of the first song is completed is input from the CD control unit 102 of FIG. 1, the determination of s+5 becomes YES. As a result, in 516, a signal instructing the CD control unit 102 in FIG. 1 to stop driving the CD is output, and the flag FLG2 is set to 0.
will be reset to As a result, the CD control unit 102
．． The disk servo circuit 103 is controlled to stop driving the disk motor 106, and the CD playback is ended. Next, since both FLGI and FLG2 became 0, s+7
The determination becomes YES, and control regarding guide performance and CD playback is ended.

On the other hand, before the stop message stp in FIG. 11 is read out from the automatic performance memory 212 in FIG. When the signal shown is input, before FLCI is reset to O, CD is
A drive instruction and FLG2 are reset to 0. Therefore, from now on, the determination of S becomes No, and S1→S Q-5l
6→S.

=5,2-5. It is repeated from the loop -5, 7,
Only guide performance is performed. Then, when the above-mentioned stop message stp is read at S, FLGI is reset to O at StZ, the process proceeds to 514-51, and S
The determination of 1 becomes YES, and control regarding guide performance and CD playback is ended.

As described above, when the performer performs the key operations shown in FIG. 18(a), the CD player section 100 shown in FIG.
While the minus hole audio data of the track is being played,
In synchronization with this, guided performance is executed by the LED 202z on the key 2022 shown in FIG. 2 in the musical instrument operation section 202 shown in FIG. And the performer uses this LED2023
The corresponding i! as shown in By operating the 202z and playing, you can feel as if you are playing with, for example, an orchestral performance based on the minus-hole audio data of the first song.

Next, the case where the key operations shown in FIGS. 18-) are performed will be described. This is an example of an operation when performing automatic performance.

In this case, first, the musical instrument control unit 201 in FIG. 1 presses "1" as the music designation key 2026 in FIG. , then data read key 2027
By recognizing that has been pressed, the first instruction data to lead the automatic performance music data of the first B-vert is displayed.
The data is transferred to the CD control unit 102 shown in the figure.

Upon receiving this, the CD control unit 102 executes the operation flow shown in FIG. 13. As a result, as mentioned above, 1 in FIG.
The automatically performed music data 404+s of the B part of the music piece is read out and sent from the subcode signal processing circuit 110 to the instrument control unit 20.
1, the CD control unit 102 locates the beginning of the minus B audio data 403 of the first song recorded as shown in FIG. 8, and the minus B audio data 403 of the first song is immediately playable. become.

On the other hand, the musical instrument control section 201 controls the subcode signal processing circuit 1
When the automatic performance music data 404□ from 10 is received, the operation flow shown in FIG. become.

Next, the musical instrument control unit 201 recognizes that the auto play start key 2029 in FIG. 2 has been pressed to instruct guide play as the key operation in FIG. 18(b), and performs the operation flow in FIG. Execute. In this operation flow, the guide performance process 512 in the operation flowchart of FIG. 15 related to the aforementioned guided performance is replaced with the process of automatically performing S and 2', and the other operations are the same as in FIG. 15. .

As described above, when the performer performs the key operation 1 in FIG. 18, the CD player section 100 in FIG. The musical instrument section 200 automatically performs the first B-vert (violin). This results in
It is possible to obtain a state in which an automatic performance is performed with, for example, an orchestral performance in the background based on the minus B audio data of the first song.

Next, a case where the key operation shown in FIG. 18(C) is performed will be described. With this key operation example, C in Fig.
Only the playback operation of the second song minus B audio data 403zm (see Figure 8) recorded in D105 is performed, and no guide performance or automatic performance is performed, and therefore, the automatic performance song data of the subcode is also read. do not have.

In this case, the musical instrument control section 201 in FIG. 1 executes the operation flowchart shown in FIG. 17.

First, it is recognized that "2" was pressed as the song designation key 2026 in Figure 2, and then the part designation key 2025 to designate the B part (violin bart) was pressed, followed by the minus one start key 202 + o. As a result, the instruction data for playing the minus B audio data of the second song in the CD player section 100 is changed to the first one.
Zero or more processes transferred to the CD control unit 102 in the figure are executed in Sil+ in FIG. 17. C received this
The D control unit 102 accesses the TOC data (FIG. 9) on the TOC memory 101 and reads out the first frame number of the minus B audio data of the second song, thereby controlling the pickup servo circuit 104 and reading the first frame number of the minus B audio data of the second song. By moving the optical pickup 107 to this position, the beginning of the minus B audio data 4032m of the second song recorded as shown in FIG. 8 is located.

As a result, the minus B audio data of the second song is 40
3) becomes playable immediately.

Next, in S9, a CD playback instruction is given to the CD control section 102 in FIG. The CD control unit 102
Upon receiving the above instruction, playback of the minus B audio data 40321 (see FIG. 8) of the second song, which has been cued in advance based on the instruction in the Sll described above, is started.

Subsequently, in S8o, a state is entered to wait for the detection of a signal from the CDIII control unit 102 indicating that the reproduction of the minus B audio data of the second song has been completed.

When the reproduction end signal is input from the CD control section 102 of FIG. 1, the determination of StO becomes YES. As a result, s
At i+, a signal instructing the CD control section 102 in FIG. 1 to stop the CD drive is output, and the control section 102
Control the disk servo circuit 03 to drive the disk motor 1
06 is stopped and CD playback is ended.

With the above playback operation, the performer operates the keys 2022 on the keyboard 202I shown in FIG. 2 of the musical instrument operation section 202 in FIG. 1 to perform a performance with this CD playback sound in the background. In this case, by operating the tone designation key 202++ in FIG.
By setting , the performer can feel as if he or she is playing with a full orchestra in the background.

(Essai Disaster Management Team) As described above, in the embodiment shown in FIG. Although it functions as a PCM sound source, it is not limited to this, and it is possible to apply various musical sound waveform generators such as a waveform modulation method, an overtone addition method, an overtone subtraction method, etc.

In addition, the recording of the tone length control command in FIG.
D [This is done using an exclusive message in the standard, and in this case, a new CD-MI message is added to the ID part.
Although an ID for DI is set, it is also possible to add, for example, an identification flag for CD-MIDI following the existing manufacturer ID, and then add a tone length control command. good.

On the other hand, in the above embodiment, the automatically performed music data and the audio data to be played in synchronization with the data are recorded on a CD and played back via a CD device (compact disk device). Any recording medium that can record data is not limited to CDs, but D
An AT (digital audio recorder) or the like may also be used.

In addition, in the above-mentioned embodiment, the audio data of a different minus one part (minus A, etc.) and the automatically played music data for that part were recorded in the L channel and the R channel, but not in the L channel and the R channel. The data of each part may be recorded at different time positions.

In addition, the automatically played music data is stored at a different time position in the audio data recording area, not in the subcode area.
The data may be recorded in a D-ROM recording format. In this case, the minus one-part audio data will also be recorded in the CD-ROM recording format.

〔Effect of the invention〕

According to the present invention, automatically performed music data for instructing automatic performance and audio data to be played in response to the automatically performed music data are mixed and stored in the same data storage means, and each data is read from the same means for automatic performance. When giving instructions,
Since the automatic performance control means synchronizes the automatic performance instruction to the sound source means and the reproduction instruction of audio data to the reproduction means, automatic performance and reproduction of the corresponding music can be realized with simple operations.

In particular, after reading the automatic performance music data into the temporary storage means in advance and locating the beginning of the audio data, the automatic performance instruction to the sound source means and the audio data reproduction instruction to the playback means are started synchronously. By doing so, it becomes possible to reliably synchronize the timing of the start of sound production of the music and the start of automatic performance.

In addition, by using a compact disc as a data storage means and storing audio data in the audio data area and automatic performance music data in the user's bit area of the subcode area, efficient data storage can be achieved.
It is possible to make it work.

In addition, if time control data is included at the beginning of the automatically performed music data to cause the automatic performance control means to adjust the timing of the playback of the audio data and the start of the sound generation of the first musical note to be automatically performed, the audio It is also possible to reliably perform automatic performance in which the part performance starts after a certain period of time from the start of data reproduction.

Furthermore, by including timbre setting data for timbre setting at the beginning of the automatically performed music data, it is possible to automatically set the timbre of the electronic musical instrument before starting the automatic performance.

In addition, by storing audio data such as a minus one orchestral performance other than the piano part, and having it play back and play automatically, it is as if the piano part is being played automatically with the orchestral performance in the background. This makes it possible to obtain effective effects. As a result, it is possible to easily grasp the pronunciation timing of a particular part in the flow of the entire song, and it is possible to grasp the image of the entire song, which is useful for learning how to play the parts.

In addition, since audio data can be recorded in stereo on compact discs, etc., different minus one part audio data can be stored in the left channel and right channel, and automatic performance song data for each part corresponding to the sub chord area can be stored. If you memorize this, you will be able to enjoy automatic performance on two musical instruments.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention. FIG. 2 is a configuration diagram of a musical instrument operating section. FIG. 3 is a configuration diagram of a frame. FIG. 4 is a configuration diagram of a subcode frame. is a packet configuration diagram of user's bits, FIG. 6 is a pack configuration diagram of user's bits, and FIG. 7 is a CD-MID
FIG. 8 is a diagram showing the contents of audio data and subcodes recorded on CD-MIDI, and FIG. 9 is a diagram showing the back format of the user's bit of TO
FIG. 10 is a diagram showing MIDI messages, FIG. 11 is a diagram showing an example of automatically performed music data, FIG. 12 is an operation flowchart when setting a disc, and FIG. 13 is a diagram showing data. Figure 14 is an operational flowchart of read processing, Figure 14 is an operational flowchart of data storage processing, Figure 15 is an operational flowchart of guide performance processing, Figure 16 is an operational flowchart of auto play processing, and Figure 17 is minus one performance. Processing operation flowchart, FIGS. 18(a) to 18(C) are diagrams showing examples of key operations. 100...CD player section, 101...TOC memory, 102...CD control section, 103...disk servo circuit, 104...pickup servo circuit, 105...C
D (CD-MIDI), 106... Disc motor, 107... Optical pickup, 10B... Demodulation circuit, 109... Audio data signal processing circuit,... Subcode signal processing circuit, 208... D/A converter, 209...Low pass filter (L llo 116.1 1 1°PF), 112 ・ ・ 113.2 114.2 115 ・ ・ 200 ・ ・ 201 ・ ・ 202 ・ ・ 203 ・ ・ 204・ ・ 205 ・ ・ 206 ・ ・ 207 ・ ・ 212 ・ ・ 213 ・ ・ 214 ・ ・

Claims (1)

[Scope of Claims] 1) Sound source means for performing automatic performance based on automatically performed music data; Reproducing means for reproducing audio data representing a music piece; and storing the audio data and automatically performed music data in a mixed manner. a data storage means; an operation of reading out the automatically performed music data from the data storage means and instructing the sound source means to automatically perform; reading out the audio data from the data storage means and playing the audio data with the playback means; An automatic performance device comprising: automatic performance control means for synchronously performing playback operations. 2) The automatic performance control means includes a temporary storage means for temporarily storing the automatic performance music data, and the automatic performance control means stores the automatic performance music data to be performed automatically from the data storage means. After preliminarily reading into the storage means and locating the beginning of the audio data to be reproduced on the data storage means, synchronizing an automatic performance instruction to the sound source means and an instruction to play the audio data to the reproduction means. 2. The automatic performance apparatus according to claim 1, wherein the automatic performance instruction is sequentially given to the sound source means while sequentially reading out the automatic performance music data from the temporary storage means. 3) The automatically performed music data includes: sound generation start instruction data that instructs the sound source means to start sound generation; time control data that controls the sound generation time; and time control data that instructs the sound source means to end sound generation. 3. The automatic performance device according to claim 1, further comprising sound generation end instruction data. 4) The time control data is included at the beginning of the automatically performed music data in order to adjust the timing of the reproduction of the audio data and the start of sounding the first musical tone to be automatically performed. The automatic performance device described. 5) The sound generation start instruction data is a note-on message in a MIDI message, and the sound generation end instruction data is a note-off message in a MIDI message.
5. The automatic performance device according to claim 3, wherein the time control data is a message, and the time control data is defined using an exclusive message in a MIDI message. 6) The head portion of the automatic performance music data includes timbre setting data for causing the tone generator to set a timbre via the automatic performance control means before the automatic performance instruction starts. An automatic performance device according to any one of claims 1 to 5. 7) The automatic performance device according to claim 6, wherein the tone color setting data is a program change message in a MIDI message. 8) The data storage means is a compact disc, the playback means is a compact disc player, the audio data is stored in an audio data area of a program area of the compact disc, and the automatically performed music data is stored in the audio data area of the compact disc. Table of contents data is stored in a user's bit area of a subcode area of a program area, and is stored in a lead-in area of the compact disc for locating the beginning of each of the audio data and automatically performed music data stored in the compact disc. The automatic performance device according to any one of claims 1 to 7, wherein the automatic performance device is stored. 9) The table of contents data is data in which each of the audio data and the automatic performance music data stored on the compact disc is associated with a number of a first frame of each data. 8. The automatic performance device according to 8. 10) The audio data is minus one data indicating a music piece of a performance part other than the predetermined performance part, and the automatic performance music data is data for instructing automatic performance of the predetermined performance part. The automatic performance device according to any one of claims 1 to 9, characterized by: 11) In the left channel of the audio data area of the compact disc, the audio data, which is first minus one data indicating a music piece of a performance part other than the first performance part, is stored, and in the right channel of the audio data area. The audio data which is second minus one data indicating the music of a performance part other than the second performance part is stored in the subcode area of the compact disc, and the audio data of the first and second performance parts is stored in the subcode area of the compact disc. Claim 6 characterized in that data for instructing a performance is stored.
10. The automatic performance device according to any one of items 9 to 9.