JPS6055908B2 - Performance information detection storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a performance information detection and storage device suitable for detecting and storing performance information of, for example, a keyboard-type electronic musical instrument.

2. Description of the Related Art Conventionally, a device is known that detects keyboard performance information of an electronic musical instrument in the form of a multiharmonic sound source signal selected by a key switch of a keyboard, and stores the detected information on, for example, a magnetic tape.

However, such a performance information storage device (a) converts a multiharmonic sound source signal, which is an analog signal, into, for example, a magnetic quantity and stores it. There are problems such as: (b) it is difficult to store faithfully, and (b) the amount of performance information to be stored is enormous, so a memory with an extremely large storage capacity is required. The present invention has been made to solve these problems, and an object of the present invention is to provide a performance information detection device that can faithfully store information with a reduced storage capacity. In order to achieve this object, the performance information detection and storage device of the present invention collects digital performance information corresponding to the displacement of each operator of a plurality of operator groups each having one or more operators. The operating state of the controller can be detected and stored as compressed information including a digital signal indicating the state of change when the change occurs and a relative time signal indicating the relative time between those changes. It is possible to selectively detect and store each group.

With this configuration, since digital signals corresponding to the displacement of each control element are handled instead of analog signals such as multiharmonic sound source signals, faithful storage is possible, and furthermore,
By storing digital signals and relative time signals for each change in performance status, there are practical benefits such as the ability to significantly reduce the storage capacity of the storage device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, with reference to embodiments in which the present invention is applied to an automatic performance system for an electronic musical instrument.

FIG. 1 shows an electronic musical instrument automatic performance system according to an embodiment of the present invention. This is a performance information processing device that processes the digital performance information obtained from the musical instrument 1 and sends it to the electronic musical instrument I again. First, the configuration and operation of the electronic musical instrument 1 will be described.

For example, a plurality of multiharmonic sound source signals 31 from a tone generator 1 (TG) comprising a plurality of oscillators that generate multiharmonic signals rich in harmonic components such as square wave signals and sawtooth wave signals are generated by field effect transistors. The signal is transmitted to an electronic keyboard switch 2 (ECl) consisting of a group of switching elements such as. A signal generator 16 that generates a digital keyboard signal according to the displacement of the switch K of each key of the keyboard is connected to this electronic switch 2 via a switch SW2, and the signal generator 16 generates a digital keyboard signal according to the displacement of the switch K of each key of the keyboard. Each switching element of the electronic switch 2 is controlled according to digital performance information related to pitch and tempo. Multiharmonic sound source signal 3 selected or switched according to pitch and tempo
2 are guided to tone circuits 3 to 5 (TCFl to TCF3) each including a tone filter or formant filter, and are shaped into waveforms according to the wave characteristics of the tone circuits 3 to 5, for example, flute type, Musical tone signal 33,3 given the frequency spectrum of each string-type and lead-type tone.
It is output as 4,35. Musical tone signals 33 to 35 are transmitted through tone lever electronic switches 6 to 8 (EC3 to E), respectively.
C5), they are transmitted to the mixing circuit 9 as musical tone signals 36 to 38 whose amplitudes are controlled between the 0 level and the input level. Each electron. Digital tone lever signal generator 1 having tone lever levers ~L3 corresponding to switches 6~8
7 to each electronic switch 6 to 8 via switch SW3,
It provides a digital signal for switch control according to the displacement of each tone lever. That is, if the displacement on the tone lever L is appropriately operated from the minimum value to the maximum value according to the performance content (in the case shown, it can be operated in four stages), for example, each tone lever 6 to When the displacements of 8 are set to low, medium, and high, respectively, the musical tone signals 33 to 35 of the flute type, string type, and reed type are changed to the musical tone signals 36 to 38 having the corresponding amplitudes of low, medium, and high, respectively.
can be changed to Of course, it is also possible to set one tone lever to the zero position so that the corresponding one musical tone signal is not output. A mixed output signal 39 obtained by mixing the musical tone signals 36 to 38 whose amplitudes have been controlled in this manner in the mixing circuit 9 (MC) is sent to the output amplifier 11 via the electronic expression switch 10 (EC6). .

A pedal signal generator 18 having an expression pedal P converts the displacement of the pedal P into a corresponding digital signal, and is connected via a switch SW4 to an electronic switch 10 including a switching element that responds to this digital pedal signal. be done. Electronic switch 10 provides a mixed output 40 whose amplitude is controlled in response to a digital signal corresponding to pedal displacement. An amplified musical tone signal 41 from output amplifier 11 receiving this mixed output 40 is converted into an acoustic signal by speaker 12. By the way, tone generator 1
In order to obtain a vibrato effect by vibrato modulating the multiharmonic sound source signal, a vibrato oscillator 14 (VO
) are connected via an electronic switch 13 (EC2).

A push-button signal generator 15 having a push-button switch B that is operated when a vibrato effect is desired is provided, and a digital signal obtained from this signal generator 15 is guided to the electronic switch 13 via a switch SWl to control it. Do it like this. The vibrato push button switch B1 exemplified above is used as an operator to be operated during performance.
In addition to the key switch K1, the tone lever L upper 3, and the expression pedal P, some types of electronic musical instruments have more operators. It is clear that the digital performance method described above can be applied to all of the operator groups as necessary.

In any case, the electronic musical instrument 1 configured as described above is capable of handling all digital performance information obtained by the player operating each operator, such as pitch, tempo, timbre, volume, and digital performance related to various effects. Musical tone information corresponding to the information can be obtained from the speaker 12.

Therefore, the digital performance control means, which is particularly different from conventional electronic musical instruments, will now be described in detail.

The push-button switch B1 for vibrato effect and the key switch K can both be mechanical switches that take two states, on and off.
5 and 16 may be configured such that on/off outputs can be taken out from closed circuits that are turned on/off by these switches.

Since each tone lever L1-L3 has four different positions, an A-D converter is provided to convert the angular displacement of the lever into a digital signal. Similarly, an AD converter is provided to convert the displacement of the expression pedal P into a digital signal. An example of these A/D converters is shown in Figures 2a and 2b. Figure 2a shows the tone lever A-
This shows a D converter, in which a 2-bit encoder 131 is coupled to a rotary switch 130 having four contacts corresponding to the four angular positions of the tone lever, so that the four displacement states can be converted into a 2-bit binary signal. It's getting old. Figure 2b shows A-D for expression pedals.
1 on the input side of the 4-bit encoder 141.
A rotary switch 140 is connected. That is,
Since the displacement of the pedal is normally converted into an angular displacement, the angular displacement is quantized into one forge by the rotary switch 140, and the angular displacement of one forge is quantized into four by the encoder 141.
It is designed to convert into a binary signal of bits. FIGS. 3a and 3b illustrate a detailed configuration of an A-D converter relating to the connection between the rotary switch and the encoder.

Although the A-D converter in this example is for a tone lever (2 bits), it will be clear from the following description that one for a pedal (4 bits) can be similarly constructed.
A shaft 150 is rotatably attached to a fan-shaped code plate 151 having a cover 152. This shaft 150 is given an angular displacement by a tone lever, and a sliding member 154 is fixed to a supporting member 153 fixed to the rotary shaft 150 by a bolt/nut pair 155. Contacts 159 and 160 that are electrically insulated from each other are attached to the sliding member 154, and this pair of contacts are connected to NAND gates 160a and 160.
0b inputs, respectively. On the surface of the code plate 151, two arc-shaped insulating layers 156 and 157 are arranged in parallel in the radial direction.
58a to 158c are formed. A- of such a configuration
In the D converter, the potential Vcc is applied to each input terminal of the NAND gates 160a and 160b via a resistor, and in order to prevent chattering, the voltage is rotated by a tone lever with a resistor and a capacitor connected to the ground. When the shaft 150 is rotationally driven to cause the sliding member 154 to assume four different angular positions, the NAND gate output ends Tl, T
A 2-bit (4-state) binary signal can be obtained in 2.

Regarding the electronic switches 6 to 8, 10, which are controlled by the output digital signals of these signal generators 17, 18, respectively, although these electronic switches are controlled by digital signals, they control input analog signals according to the control signals. It is an analog switch that transmits to the output side, for example, the fourth
The structure can be made as shown in FIG. 4a and FIG. 4b.

FIG. 4a shows an electronic switch 6, 7, or 8 used in correspondence with the A-D converter of FIG. 2a already illustrated as a tone lever, and includes switching elements S1 to S4 such as field effect transistors. A solid state switching circuit 133 consisting of a solid-state switching circuit 133, a voltage dividing resistor circuit 134 having a tap connected to an input terminal of this circuit, and a decoder 132 connected to a control input terminal of the circuit 133 are provided. Now, input terminal T. One of the musical tone signals 33 to 35 is applied to the terminal Tl, T2, and the transducer output terminal Tl, T of FIG. 2a is applied to the terminal Tl, T2.
If a 2-bit binary signal from No. 2 is applied, one of the switching elements S1 to S4 is turned on according to the binary signal, thereby switching between the input level and the O level in four stages. Musical tone signals 36, 37 or 38 with different amplitude levels can be obtained at the output terminal 9. FIG. 4b shows a 4-bit analog electronic switch used in correspondence with the converter shown in FIG. A solid-state switching circuit 143 including output-controlled switching elements S1-S16, which can be selected in response to a 4-bit binary signal applied to decoder inputs T1-T4, is connected to the electronic switch of FIG. 4a. It is easily understood that they function similarly. Switches SWl to SW, are the electronic musical instrument 1
This is for switching between the actual performance by the performer and the automatic performance by the information processing device ■.In consideration of the case where this automatic performance device is applied to the training system etc. described later, it is possible to select and input each independently. It's getting old.

When the movable contacts of the switches SW1 to SW4 are brought into contact with the contacts X1 to X, respectively, as shown in the figure, the player can touch the movable operators group of the operated musical instrument 1, that is, the key switch K1 of the keyboard, the tone lever! ~L3, expression pedal P1, vibrato switch B, etc. are operated according to the performance content, digital performance information is obtained from each contact point X1 to X, and the tuning fork corresponding to this digital performance information receives acoustic information. is obtained from the speaker 12. Next, the configuration and operation of the performance information processing device (2) will be described.

In FIG. 1, digital performance information 46 consisting of digital signals 42 to 45 obtained from contacts X1 to \ is transferred to the information compression detection device 21(n)D), and when a change (event) in the performance state occurs A compressed form of digital performance information 47, including a digital signal containing the changes in , and a relative time signal indicating the relative time between the changes, is stored in the storage device 22 (
MEM).

By appropriately operating the contacts X1 to X4 during this storage, it is possible to selectively store the operator states of only a specific group of operators. The stored contents of the storage device 22 are read out as digital information 48 to the information reproducing device 23 (IRD) and reproduced as performance information 49 in the original uncompressed form, and distributed and supplied to the other contacts Y1 to Y4 of each switch. be done. A control device 24-(CD) is provided which controls the operations of these devices 21-23 using control signals 54-56, respectively. In this embodiment, if the information compression detection device 21 and the information reproducing device 23 are provided and the digital performance information obtained from the electronic musical instrument 1 is not directly stored and reproduced by the storage device 22, a huge amount of information will be lost. This is to allow digital performance information to be stored using a storage device with as low a storage capacity as possible. By configuring the performance information processing device (■) in this way, the performances of the performers whose movable contacts of the switches SW, ~SW, are set at the positions X1 to X shown in the figure can be compressed into the storage device 22. It is stored as the digital performance information 47 of the shape, and the switch S is pressed at the appropriate time after the performance.
Insert the movable contacts Wl to SW4 into the Y1 to Y4 sides,
The digital performance information 48 is read out from the storage device 22 by the information reproducing device 23, reproduced, and distributed to each of the contacts Y1 to Y4, thereby allowing the electronic musical instrument 1 to perform automatically and unattended. In this case, for example, without putting the switch SW2 into the Y2 contact side, you can put the other SW1~"SW3 and SW4 into the Yl, Y3, and Y4 contact sides, respectively, to create a vibrato effect, tone control, and expression. It is also possible to automatically reproduce only the performance information related to (volume) control and have the performer perform only the keyboard performance.As is clear from the above explanation, some of the terms used in this specification Let's define it here.

That is, (1) r-operations refer to keys, tone levers, volume control knobs, vibrato effect levers, expressions, pedals, etc. that the performer operates according to the content of the performance during performance. (2) 1 Digital performance information refers to information obtained by converting the displacement position or displacement state of an operator into a corresponding digital quantity, and for example, this information is a 256-bit binary signal. (3-bienjo refers to the change in the state of the control between the current scanning time and the previous state scanning time when detecting the state of the control. (4) 1 relative time refers to the time interval between one event and the preceding event, and is indicated by ΔT. (5) rStatus word refers to digital performance information corresponding to the status of the controllers, which are divided into blocks into a plurality of groups. (6) The event check word is digital information that indicates the address of the block where the event occurred. (7) The compressed information is the digital information that indicates the status word, event check word, and relative time. One of the features of the present invention is that a huge amount of performance information is processed by combining a plurality of pieces of information.Hereinafter, the specific configuration and operation of the performance information processing device (2) will be described. will be explained according to FIG.

In the figure, contacts X and -X4 that lead to digital performance information signals 42 to 45 are connected to event detection circuits 62 to 66, respectively.
5 (EDCl to EDC4).

These event detection circuits 62 to 65 compare digital information regarding the corresponding operators at regular time intervals, detect events as data changes, and send the results to the control processor 92. Here, as a representative example, an event detection circuit 62 that detects an event related to a keyboard, that is, a change in the playing state of the keyboard will be described.

A digital signal 43 corresponding to the displacement of the key switch K obtained from the keyboard signal generator 16 is sequentially input in parallel at intervals of Tφ2=1/fφ2 by the clock pulse φ2.
It is read out to the serial out shift register 71 (SRl). The keyboard information read out in a certain period is determined by the clock pulse φ1 as Tφ1=Tφ2/n (where, for example, n=
24) The signals are sequentially sent to the serial-in-parallel-out shift register 72 (SR2) at a period of 24). The contents of the shift register 72 are written into the buffer register 74 (BFl) at the same time as this forwarding by the clock pulse φ2. In the next cycle of clock pulse φ2, shift register 7
The digital signal indicating the performance status of each key read out in step 1 is compared bit by bit of each corresponding key with the digital signal indicating the performance status of each key in the previous cycle, ie, the contents of the shift register 72, in an exclusive OR gate 73. Ru. If even 1 bit does not match in this comparison, exclusive OR gate 7
3 produces an output, which output is connected to flip-flop 75 (F
F) is temporarily stored. That is, if even one bit of the digital signals compared by the exclusive OR gate 73 does not match, it means that a performance state change (event) of ON or OFF has occurred in one of the key switches.
The output terminal of the flip-flop 75 is connected to its input terminal for feedback, and if there is even one event bit in the comparison result of the exclusive OR gate 73, the stored contents will eventually become that event bit. become. For example, for simplicity, exclusive or gate 73
The 16-bit digital signals are compared and the result is R
Assuming that OOOlOOOOOOOOOOOOJ,
The memory contents of the flip-flop are ROOOllllllll
llllll, and finally RlJ is memorized. For example, if the shift registers 71 and 72 are configured to store 256-bit keyboard performance information, the comparison in the exclusive OR gate 73 and the temporary storage in the flip-flop 75 are performed for each 16-bit block. The detection results for each 16 bits (block) may be temporarily stored in another shift register (not shown). As can be seen, in this case, the information in the shift register (other registers not shown) corresponds to one event check word. In any case, the stored contents of flip-flop 75 are guided to OR gate 66. The input terminal of the OR gate 66 is connected not only to the event output of the keyboard event detection circuit 62 but also to other vibrato switches, tone levers, expression pedals, etc. that perform similar detection operations in parallel with this detection circuit 62. The event outputs of the event detection circuits 63, 64, and 65 in each control group are led, and the result of the OR logic is sent to the AND gate 67 as a storage request signal, that is, a request store signal 100, in synchronization with the clock pulse φ2.
is output as

Further, a counter 61 is provided which is driven by a clock pulse φ2 and cleared by the output CP of the processor 92 (not shown on the processor 92 side) to indicate the relative time between event signals.

That is, the counter 61 constantly counts the clock pulse φ2, which is output from the control processor 92 upon generation of the request store signal 100. Therefore, it is cleared every time an event signal is sent out from each of the detection circuits 62 to 65. In this way, the counter 61 is reset by the generation of an event signal, then counts the clock pulse φ2, and is reset again by the generation of the next event signal. Corresponds to the time until the signal is generated. The count value of the counter 61 represents the elapsed time since the previous event signal was generated. In this way, events are detected for performance information (eg, 512 bits) for all movable members.

The control processor 92 (CP) is driven by the request store signal 100 based on the event detected as described above.

This control processor 92 performs, for example, 8-bit parallel processing, and in addition to general functions such as logical operations, arithmetic operations, data transfer, and jumps, it also performs instructions stored in a read-only memory 91 (ROM). Therefore, the value of the program counter can be arbitrarily set using an external signal. That is, the control processor 92 (CP) sends a request to the first-in-first-out memory 93 (FIFOl) using the command signal 112 in accordance with the command of the read-only memory 91 (ROM) in which information processing procedures or commands are stored in advance. When the store signal 100 is received, the event relative time 101 of the counter 61 and the content 10 of the buffer register 74
Among the contents 103 to 105 of the other detection circuits 63 to 65, r1 in the shift register in which detection results of every 16 bits are stored can be stored with a word corresponding to a certain bit. Each time this storage is completed, the counter 61 and flip-flop 75 are cleared by the clear pulse CPI, and one sequence of checks is completed. The above-described detection and storage operation is repeated throughout the entire playing process of the electronic musical instrument 1.
The FIFOl 93 is a type of temporary storage device that outputs the information inputted first, and the control processor 92 periodically transfers the stored information 110 to the cassette tape memory 94 each time the stored content of the FIFOl 93 reaches a predetermined amount. Memories 93 and 94 are controlled by command signals 112 and 113 to transfer the data. In this way, all performance information is stored on the cassette tape in the cassette tape memory 94 in a compressed format, including a digital signal containing changes in the performance state when the change occurs, and a relative time signal indicating the relative time between the changes. The information is stored in the form of a compressed event matrix (i.e., a data format of compressed information). In this case, in order to store irregularly compressed information in a simple memory 94 capable of long-term storage, a FIFO is installed at the front stage of the memory 94.
Providing memory 93 is extremely beneficial. Furthermore, it is understood that storing such a huge amount of performance information in a compressed form is extremely effective in reducing the storage capacity of the memories 93 and 94. For example, in an automatic performance system that displays all performance information as a 512-bit binary signal, considering that at most only a few 10 bits change during the actual performance, the compression detection storage method described above is It is clear that the present invention plays an important role in reducing the storage capacity, thereby simplifying the entire device and reducing the cost. The configuration and operation of the system for compressing, detecting and storing digital performance information have been described above. Next, the configuration and operation of the system for reproducing the stored digital performance information will be described.

In the cassette tape memory 94, compressed digital performance information is stored in the cassette tape memory 94 as shown in FIGS. 6a and 6b.
Event relative times ΔT1 to ΔTnl are stored in the form of event matrices 1 to n, including an event check word that indicates the address of the buffer register where the event occurred, and a status word that indicates the contents of the buffer register when event j occurred. ing.

These event matrix information 111 are sequentially and regularly stored in the first-in first-out buffer memory 95 (
FIFO2).

The control processor 92 controls this read operation using command signals 113 and 114. In this performance information reproducing device, parallel input from the memory 95 is performed.
Serial out shift register 87 (SR3) is keyboard-related pitch performance information 116, parallel in-parallel out buffer register 82 (BF,) is vibrato effect presence information 117, parallel in-parallel out buffer register 83 (BF4) contains tone lever-related tone information 118, parallel in-parallel out buffer register 84 (BF5) contains expression pedal-related volume information 119, and counter 85 (
CT,), the event relative time information 120 can be read out separately.

Control processor 92 reads commands from memory 91 and controls memories 94, 95, counter 88 (CT2), and shift control register 90 (SCR) using command signals 113, 114, and 115, respectively.

Serial in-parallel out shift register 86 (
SR4) is provided to perform modifications such as automatic key transposition and tempo change, which will be explained later.
2) is for performing a buffer function when transferring keyboard information to an electronic musical instrument. At ANDGATE 89,
The supply of clock pulse φ3 is controlled in accordance with the command signal read to shift control register 90, and its output signal 125 becomes a shift control signal for shift registers 86 and 87, and is simultaneously counted by counter 88. Counter 88 clears register 90 with its ripple clock signal 127. In order to reproduce the performance information, first, the signal of the event relative time ΔT1 is input to the counter 8.
5 (CT3), and this counter 85 is counted down by clock pulse φ2.

This counter 85 is decremented by the clock pulse φ2, and its contents become the signal ROJ.
The underflow signal (underflow signal) is sent to the control processor 92 as an information request signal, ie, a request data signal 121. In response to this signal 121, the control processor 92 first checks the contents of the event matrix starting from the address indicated by the event check word, and selects the parallel-in/serial-out shift register 87 (SR3) and buffer registers 82 to 84 having the corresponding addresses. Instructs the memory 95 to write the status word in (BF3 to BF5). Also, counter 8
5 also counts down the event relative time ΔT2 so that the contents of the registers 87, 82 to 84 that have been written are held until the contents become zero. In this way, the counter 85 counts the event relative time to detect the event, and by reading the status word containing the event bit corresponding to the event, information related to pitch, timbre, effect, and tempo is obtained. becomes possible to play. shift registers 86, 87,
It has four operations: clock inhibit, right shift, left shift, and parallel load, and these controls are controlled by the signal 128 from the shift control register 90.
It is carried out independently by

Furthermore, during the operation mode of the shift registers 86 and 87, (a)
Clock inhibit is a state in which the clock input is interrupted and the data contents do not change. (2) Right shift is a state in which data is shifted to the right. (3) Left shift is a state in which data is shifted to the left. (d) Parallel load indicates a state in which parallel data is input from the outside. Now buffer register 8
To describe the operation of transferring the keyboard information 124 to 1, (1)
Load the shift register 87 in parallel, (2) write a status word as predetermined information to the shift register 87, and (3) write and shift the number of bits transferred to the counter 88, that is, the number of bits in the shift registers 86 and 87. Control register 90 puts shift registers 86 and 87 in a right shift mode, and the transfer and counting of enabling counter 88 to count down is performed by clock 125.

In this case, when the transfer ends and the counter 88 reaches O, the generated ripple clock signal 127 clears the shift control register 90, and the counter 88 and shift register 86
, 87 are stopped. The above operations are related to faithful reproduction, but if modulation-modified reproduction is required, the following may be performed. First, consider the case of transposing.

In this case, the key information is stored in the shift register 86 in a normal state due to the operations (1) to (3) described above. However, since each bit of the shift register 86 accurately corresponds to the information of each key, for example, in order to transpose the key a semitone higher, it is only necessary to shift the contents of the shift register 86 to the right by one bit. That is, shift register 8
Depending on whether the contents of 6 are shifted by the same bit to the right or left, it is determined whether the modulation is shifted to the treble side or to the bass side. Therefore, in order to perform a predetermined modulation, following the operations (1) to (3) described above, (4) write a predetermined shift number (number of degrees to be modulated) to the counter 88, and (5) ) The shift register 86 is set to right shift or left shift mode according to a predetermined modulation direction, the shift register 87 is set to clock inhibit mode, and the counter 8 is set to a clock inhibit mode.
All you have to do is make it possible to count 8. Furthermore, by rearranging the contents of the shift register 86 in a completely reverse order, it is possible to obtain a very special effect as if the keyboard was played with the left and right sides completely reversed, and this is called reverse keying. This transmission modulation. If necessary, in (3) above, shift register 87 is set to right shift mode and shift register 86 is set to right shift mode.
You can set each to left shift mode and perform the same operation below. Next, consider a case where modified playback is performed to change the tempo of a song.

In order to change the tempo of a song, it is sufficient to change the event relative time ΔT regarding the keyboard information. That is, changing ΔT changes the speed at which the key (tone) changes, increasing ΔT slows the tempo, and shortening ΔT speeds up the tempo. For this purpose, the clock pulse φ2 of the counter 85 is
All you have to do is make the frequency variable and control it manually. That is, for example, if the frequency of the clock pulse φ2 to the counter 85 is increased, the request data signal 121 is outputted from the counter 85 earlier. Therefore, the status words written to the shift register 87, counter 88, and register 90 change quickly. Alternatively, in the control processor 92, the event relative time ΔT is multiplied by an arbitrary constant α,
A similar purpose can be achieved by writing the value ΔD=αΔT into the counter 85. As described above, information related to pitch and tempo is read to the buffer register 81. On the other hand, the volume
Tone color and effect related information are read into buffer registers 83, 82, and 84, respectively, at each change (event) timing indicated by the relative time signal.

After all, the digital performance information of the operators in the corresponding operator group of the electronic musical instrument is reproduced in each buffer register 81 to 84, so the contents of each register are transferred to the corresponding contacts Y1 to Y.
By periodically distributing and supplying musical tone information corresponding to the stored performance information to the electronic musical instrument 1 using the clock pulse φ2,
It can be played through.

In the above embodiment, instead of the memory 94, a disk,
Of course, it is possible to use a known storage device such as a semiconductor memory, magnetic tape, or optical card, and the internal logic circuit configuration of the information processing device (2) is not limited to the above embodiment, but can be changed as desired. Depending on the situation, various circuits solved by Boolean algebra can be substituted.

Furthermore, it will be obvious that a known computer can be applied to the information processing device (1) without departing from the spirit of the present invention. As described above, the performance information detection and storage device of the present invention has the following excellent effects.

(1) Since digital performance information is detected, stored, and reproduced in accordance with the displacement of the operators in the operator group, extremely faithful performance reproduction is possible, and modification reproduction can also be performed as appropriate. (2) The storage capacity of the performance information storage device can be reduced by digitally processing a huge amount of performance information and selectively storing only the scanner states of a specific group of scanners.

(3) By extracting digital performance information from all groups of operators, it is possible for even an amateur to reproduce fully automatic performance of an electronic musical instrument that requires no hand from the performer during playback.

(4) During playback, for example, by setting the playback operation so that only keyboard-related information is played and other tone, volume, and effect-related information is not played, or vice versa, automatic It is possible for other performers to provide performance information that is not reproduced to the electronic musical instrument,
This can assist in performance practice, composition, or arrangement activities.

An automatic performance device using the performance information detection and storage device of the present invention having such effects as described above can be used, for example. For example, it is extremely useful for applications such as unmanned demonstrations of electronic musical instruments, simulations of electronic musical instruments, and performance training systems for electronic musical instruments.

Although the present invention has been specifically described above with respect to an automatic performance system for an electronic musical instrument, it is clear that the present invention can also be applied to general keyboard instruments that can handle keyboard information digitally.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an automatic performance device for an electronic musical instrument according to an embodiment of the present invention, FIGS. 2a and 2b are block diagrams of an A-D converter for an angular displacement member used in the above embodiment,
Figures 3a and 3b are detailed configuration diagrams of the above A-D converter, and in detail, a top view of the code board and its ■B-■B
4a and 4b are wiring diagrams of the analog electronic switch circuit used in the above embodiment, and FIG. 5 is a block diagram showing details of the performance information processing device of the apparatus shown in FIG. 1. FIGS. 6a and 6b are diagrams for explaining the information processing operation of the apparatus shown in FIG. 1...Electronic musical instrument, ■...Performance information processing device, 1...
・Tone generator, 2...Electronic switch for keyboard,
3-5... Tone circuit, 6-8... Electronic switch for tone lever, 9... Mixing circuit, 10... Electronic switch for expression, 11... Output amplifier, 12
... Speaker, 13 ... Electronic switch for vibrato, 14 ... Vibrato oscillator, 15 ... Push button signal generator, 16 ... Keyboard signal generator, 17 ... Tone lever signal generator, 18... Pedal signal generator,
21... Performance information compression detection device, 22... Storage device, 23... Performance information reproducing device, 24... Control device,
61, 85, 88... counter, 71, 72, 74,
81 to 84, 86, 87, 90...shift register,
62-65...Event detection circuit, 73...Exclusive OR gate, 75...Flip-flop, 66...
Or gate, 67, 89... and gate, 91...
・Read-only memory, 92 ・I control processor, 94...Cassette tape memory, 93, 95...
・First in first out memory, 133,1
43... Switching circuit, 150... Rotating shaft, 1
51... Code plate, 154... Sliding member, 160a
, 160b...Nand Gate.

Claims (1)

[Claims] 1 A plurality of operator groups each having one or more operators, an operator status signal generator that generates an operator status signal of the operator, and a controller that is connected to the operator status signal generator and is in the operator status. a device that generates an event signal that indicates that a change has occurred; a device that generates a relative time signal that indicates a relative time between the event signals; and a device that generates a relative time signal that indicates a relative time between the event signals; and a storage selection means for selecting whether or not to store the state of one or more operators of the operator group for each operator group, A performance information detection and storage device characterized in that only the operator states of a specific group of operators among the operators can be selectively stored.