JPS6055907B2 - 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 the 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 and storage device that can reduce storage capacity and faithfully store performance information.

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 a plurality of operators, a digital signal indicating the changed state when the performance state changes, and a digital signal indicating the changed state when the performance state changes. The information can be detected and stored as compressed information including a relative time signal indicating the relative time between.

With this configuration, instead of handling analog signals such as multi-harmonic sound source signals, digital signals corresponding to the displacement of each controller are handled, so faithful memorization is possible. By storing digital signals and relative time signals, there are practical benefits such as the ability to significantly reduce the storage capacity of a 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, where I is an electronic musical instrument body that operates according to digital performance information corresponding to the displacement of an operable controller, and ■ is an electronic musical instrument. This is a performance information processing device that processes the digital performance information obtained from 1 and sends it again to the electronic musical instrument I.
First, the configuration and operation of the electronic musical instrument 1 will be described. A plurality of multiharmonic sound source signals 31 from a tone generator 1 ('VG) comprising a plurality of oscillators that generate multiharmonic signals rich in harmonic components, such as square wave signals and sawtooth wave signals, for example.
is transmitted to an electronic keyboard switch 2 (EC1) consisting of a group of switching elements such as field effect transistors. This electronic switch 2 has a signal generator 16 that generates a digital keyboard signal according to the displacement of the switch K of each key on the keyboard.
are connected via a switch SW2, and each switching element of the electronic switch 2 is controlled in accordance with pitch- and tempo-related digital performance information from each key switch selected according to the content of the performance. Select according to pitch and tempo,
That is, the switched multiharmonic sound source signals 32 are respectively guided to tone color circuits 3 to 5 (TCF1 to TCF3) including tone filters or formant filters, and here, they are guided to tone color circuits 3 to 5 (TCF1 to TCF3) including tone filters or formant filters, and here, they are The signals are waveform-shaped and output as musical tone signals 33, 34, and 35 given the frequency spectra of, for example, flute-type, string-type, and reed-type tones. The musical tone signals 33 to 35 are transmitted to the mixing circuit 9 as musical tone signals 36 to 38 whose amplitudes are controlled between 0 level and the input level via tone lever electronic switches 6 to 8 (FC3 to EC5), respectively. Ru. A digital tone lever signal generator 17 having a tone lever L top 3 corresponding to each electronic switch 6 to 8 is a switch. 5
A digital signal for switch control corresponding to the displacement of each tone lever is given to each of the electronic switches 6 to 8 via W3. In other words, the tone lever! ~ If the displacement of L is operated appropriately according to the performance content from the minimum value to the maximum value (in the case shown, it can be operated in 4 stages). For example, the displacement of each tone lever 6 to 8 respectively low, medium,
When set to high, it is possible to change the flute-type, string-type, and lead-type musical tone signals 33 to 35 to musical tone signals 36 to 38 having corresponding amplitudes of low, medium, and high, respectively. 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 a mixing circuit 9 (MC) is outputted to an expression electronic switch 10.
It is sent to the output amplifier 11 via (EC6). Pedal signal 1 generator 18 with expression pedal P
The electronic switch 10 includes a switching element that converts the displacement of the pedal P into a corresponding digital signal and responds to this digital pedal signal via the switch SW4.
connected to. Electronic switch 10 provides a mixed output 40 whose amplitude is controlled in response to a digital signal corresponding to pedal displacement. Output amplifier 1 receiving this mixed output 40
The amplified musical tone signal 41 from the speaker 12 is converted into an acoustic signal by the speaker 12. Incidentally, a vibrato oscillator 14 (■O) is connected to the tone generator 1 via an electronic switch 13 (EC2) in order to perform vibrato modulation on the multiharmonic sound source signal to obtain a vibrato effect.

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. In the above case, the vibler push button switch B1, the key switch K1, the tone lever L upper 3, and the expression pedal P are used as examples of the operators operated during performance, but depending on the type of electronic musical instrument, there may be many more. It is clear that the digital performance method described above can be applied to all the operators as necessary.

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

Therefore, here, we will discuss in detail the digital performance means that is particularly different from conventional electronic musical instruments.

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. These A-
An example of a D converter is shown in Figures 2a and 2b. 2nd a
The figure shows an A-D converter for a tone lever, 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, and four displacement states are converted into two bits. can be converted into a binary signal. FIG. 2b shows an A-D converter for an expression pedal, with a multi-contact rotary switch 140 on the input side of a 4-bit encoder 141.
is connected. That is, since the displacement of the pedal is normally converted into an angular displacement, the angular displacement is converted to 1@. by the rotary switch 140. The encoder 141 converts the angular displacement of one step into a 4-bit binary signal. Figures 3a and 3b show A-D related to the connection between the rotary switch and the encoder.
The detailed configuration of the converter is illustrated.

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 supporting member 153 to which a sliding member 154 is fixed by a bolt/nut pair 155 is fixed to this rotary shaft 150 . 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, a potential ■Cc is applied to each input terminal of the NAND gates 160a and 16b via a resistor, and a tone lever is used to connect the rotary shaft with a resistor and a capacitor connected to the ground to prevent chattering. 150 is rotationally driven to cause the sliding member 154 to assume four different angular positions, a 2-bit (4-state) binary signal can be obtained at the NAND gate output terminals Tl, T2 accordingly.

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 2 is applied, one of the switching elements S1 to S,'' is turned on according to the binary signal, thereby switching between the input level and the 0 level. A musical tone signal 36, 37 or 38 having four 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 of Fig. 2b; A solid-state switching circuit 143 including switching elements S1 to Sl6 controlled by the output of a 4-bit decoder outputs the divided voltage outputs taken from each tap of the voltage dividing resistor circuit 144 from which a musical tone signal is output, to decoder inputs T1 to T. , and can be selected according to a 4-bit binary signal applied to the electronic musical instrument 1. It is easily understood that the switches SW1 to W4 function similarly to the electronic switches shown in FIG. 4a. This device is used to switch between actual performance by the performer and automatic performance by the information processing device ■.These movable contacts are normally linked, but when this automatic performance device is applied to a training system etc., which will be described later. does not necessarily need to be linked.

When the movable contacts of the switches SW1 to SW4 are kept in contact with the contacts X1 to X4, respectively, as shown in the figure, the player can touch the movable controls of the electronic musical instrument 1, that is, the key switch K1 of the keyboard.
Tone lever L1-L3, expression pedal P
1 As the vibrato switch B etc. is operated according to the performance content, digital performance information is obtained from each contact point X1 to X4, and the tuning fork corresponding to this digital performance information obtains acoustic information from the speaker 12. . Next, the configuration and operation of the performance information processing device (2) will be described. In Figure 1,
Digital performance information 46 consisting of digital signals 42 to 45 obtained from contacts X1 to X4 is transmitted to the information compression detection device 21.
Compressed digital performance information 47 that is transferred to the (IDD) and includes a digital signal that includes a change (event) in the performance state when the change occurs, and a relative time signal that indicates the relative time between the changes. is stored in the storage device 22 (MEM).

The stored contents of the storage device 22 are read out as digital information 48 by the information reproducing device 23 (IRD), reproduced as the original uncompressed performance information 49, and distributed to the other contacts Y1 to Y of each switch. Supplied.

Control signals 54 to 54 control the operations of these devices 21 to 23, respectively.
A control device 24 (CD) is provided which controls at 56. In this embodiment, an information compression detecting device 21 and an information reproducing device 23 are provided, and the information compression detection device 21 and the information reproducing device 23 are provided. The reason why the digital performance information is not directly stored and reproduced by the storage device 22 is to allow a huge amount of digital performance information to be stored using a storage device with as low a storage capacity as possible. Configuring the performance information processing device ■ in this way. Insert the switch SWl in the positions X1 to X4 shown in the figure.
The movable contacts of ~SW4 are set, and the player's performance is stored in the storage device 2 as compressed digital performance information 47, and after the performance is finished, the switches SW1~SW,
By inserting the movable contacts into the Y1 to Y4 sides, the memory device 2
By reading the digital performance information 48 from 2 by the information reproducing device 23, reproducing it, and distributing it to each of the contacts Y1 to Y, it is possible to cause the electronic musical instrument 1 to automatically perform an unmanned performance. In this case, for example, switch SW2 is not turned on to the Y2 contact side, and other SWl, SW3, and SW4 are connected to Yl and Y3, respectively.
, Y4 contact side to automatically reproduce only the performance information related to the vibrato effect, tone control, and expression (volume) control, allowing the player to perform only the keyboard performance. As is clear from the above description, some terms used in this specification will be defined here.

In other words, (1-bit controls refer to keys, tone levers, volume adjustment 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 the displacement position or displacement state of a controller converted into a corresponding digital quantity.For example, this information is a 256-bit binary signal. When detecting (status), it refers to the change in the state of the operator between the current scanning time and the previous state scanning time.
(4) Relative time refers to the time interval between one event and the previous event, and is indicated by ΔT. (5) rStatus word is digital performance information expressed as a key code or serial bit corresponding to the status of a plurality of blocks of operators. (6) The r-event check word is digital information indicating the address of the block where the event occurred. (7) Compressed information includes status words, event check words,
This refers to information that includes digital information indicating relative time, and one of the features of the present invention is that a huge amount of performance information is processed by combining a plurality of such information. The specific structure and operation of the performance information processing device (2) will be explained below with reference to FIG.

In the figure, contacts X1 to X1 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=
21) The signals are sequentially sent to the serial-in-parallel-out shift register 72 (SR2) at a period of 21). 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 simplicity, the example is an exclusive or gate73
If the 16-bit digital signals are compared and the result is 0001000000000000, then
The memory contents of the flip-flop are ROOOllllllll
lllllllJ, and finally RlJ is stored. For example, shift registers 71, 72 and 256
If bits of keyboard performance information are stored, the comparison in the exclusive OR gate 73 and the temporary storage in the flip-flop 75 are performed for each 16-bit block, and the detection results for each 16-bit (block) are may be temporarily stored in another shift register (not shown). As will be seen, in this case, the above shift register (other registers not shown)
The information within 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 has not only the event output of the keyboard event detection circuit 62, but also the event output of the keyboard event detection circuit 62.
The event outputs of the event detection circuits 63, 64, and 65 of other vibrato switches, tone levers, and expression pedals that perform similar detection operations in parallel with this detection circuit 62 are derived, and the result of OR logic is AND. The gate 67 outputs a storage request signal, ie, a request store signal 100, in synchronization with the clock pulse φ2.

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 from the change detection circuits 62-65. In this way, the count value immediately before 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 is the same as that of the current event signal from the time of the previous event signal generation. Corresponds to the time up to the time of occurrence. The count value of the counter 61 represents the passage of time since the previous event signal was generated. In this way, performance information (for example, 51
2 bits) is detected.

The control processor 9 receives the request store signal 100 based on the event detected as described above.
2 (CP) is driven.

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-on memory 91 (ROM) in which information processing procedures or commands are stored in advance. When the store signal 100 is applied, the event relative time 101 of the count 61 and the content 10 of the buffer register 74
2 and other detection circuits 63 to 65 103 to 105, a word corresponding to a certain bit is stored in RlJ in the shift register in which detection results for every 16 bits are stored. 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 the form of a compressed event matrix (i.e., a compressed information data format) that includes a digital signal containing the performance state changes as they occur and a relative time signal indicating the relative time between the changes. be remembered. 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.
The provision of 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, if all performance information is
Considering that in an automatic performance system that displays a 12-bit binary signal, only a few 10 bits change at most during actual performance, the compression detection storage method described above reduces the storage capacity and ultimately reduces the entire device. The importance of the role it plays in simplifying the process and reducing costs is clear. 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 ΔL1 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 the event occurred. There is.

These event matrix information 111 are sequentially and regularly stored in the first-in first-out buffer memory 95 (F
IFO2). This reading operation is controlled by the control processor 92 using command signals 113 and 11.
4 is used. In this performance information reproducing device, a parallel-in/serial-out shift register 87 (SR3) is stored from the memory 95 as performance information 11 of keyboard-related pitches.
6. Parallel in-parallel out buffer register 82 (BF3) contains information 117 about the presence or absence of vibrato effect;
Parallel in-parallel out buffer register 83
(BF4) contains tone lever-related tone information 118,
Parallel in-parallel out buffer register 84
Expression pedal-related volume information 119 can be read out from (BF5), and event relative time information 120 can be read out from counter 85 (CT3).

Control processor 92 reads commands from memory 91 and controls memories 94 and 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 (
SR, ) 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 out 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 sent to the counter 85.
(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 are RO. The signal that has become J (underflow signal) is sent to the control processor 92 as an information request signal, that is, 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 includes the parallel-in/serial-out shift register 87 (SR3) and buffer registers 82 to 82 which also have the corresponding address. 84(B
The memory 95 is instructed to write the status word in F3 to BF5). Further, the counter 85 similarly counts down the event relative time ΔT2 until the content becomes zero, and the counter 85 counts down the event relative time ΔT2 until the content reaches zero.
7, the contents of 82 to 84 are retained. 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 and 87 have four operating modes: clock inhibit, right shift, left shift, and parallel load, and these are controlled independently by a signal 128 from shift control register 90. During the operation modes 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; (b) right shift is a state in which data is shifted to the right; (c) Left shift indicates a state in which data is shifted to the left, and (d) parallel load indicates a state in which parallel data is input from the outside. Now, to describe the operation of transferring the keyboard information 124 to the buffer register 81, (1) the shift register 87 is loaded in parallel, (2) a stater word as predetermined information is written to the shift register 87, and (3) the counter The number of bits to be transferred to 88, that is, the number of bits in shift registers 86 and 87, is written, and the shift control register 90 puts shift registers 86 and 87 in the right shift mode, allowing counter 88 to count down. is performed by clock 125.

In this case, when the transfer ends and the counter 88 becomes 0, 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 6 accurately corresponds to the information of each key, for example, in order to transpose the key a semitone higher, it is sufficient to shift the contents of the shift register 86 to the right by one bit. That is, depending on whether the contents of the shift register 86 are bit-shifted to the right or to the left, it is determined whether the pitch is shifted to the treble side or to the bass side, respectively. Therefore, in order to perform the specified transposition, the above-mentioned (1)
Following the operations of (3) to (3), further (4) write a predetermined shift number (frequency to be modulated) to the counter 88, and (
5) Set the mode of shift register 86 to right shift or left shift according to a predetermined modulation direction, and shift register 87
What is necessary is to put the counter 88 into the clock inhibit mode and enable the counter 88 to count.

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. If this transmission modulation is necessary, please use the above (3)
), the shift register 87 is set to right shift mode,
Each of the shift registers 86 may be set to the left shift mode, and similar operations may be performed thereafter. Next, let us consider the case of performing modified playback that changes the tempo of a song.

To change the tempo of a song, you just need to change the event relative time ΔT related to the keyboard information. In other words, changing ΔT will change the speed at which the key (sound) changes, and increasing ΔT will slow down the tempo. If you make it shorter, the tempo will be faster. 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.

In the end, each buffer register 81 to 84 reproduces the digital performance information of the array position and operation state of the corresponding controller of the electronic musical instrument, so the contents of each register are applied to the corresponding contacts Y1 to Y4 with a clock pulse φ2. By periodically distributing and supplying musical tone information according to the stored performance information, it becomes possible to reproduce musical tone information through the electronic musical instrument 1.

In the above embodiment, instead of the memory 94, a disk,
It goes without saying that a known storage device such as a semiconductor memory, magnetic tape, or optical card can be used, and the internal logic circuit configuration of the information processing device (2) is not limited to the above embodiments, but can be changed to a Boolean as desired. Various circuits that can be solved by 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 according to the displacement of a plurality of operators, extremely faithful performance reproduction is possible, and modification reproduction can also be performed as appropriate.

(2) By digitally processing a huge amount of performance information, the storage capacity of the performance information storage device can be reduced.

(3) By extracting digital performance information from all the operators, there is no need for the performer's hand during playback, and even an unskilled user of electronic musical instruments can reproduce fully automatic performance.

(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, in accordance with automatic playback, Performance information that is not automatically reproduced can be provided to the electronic musical instrument by other performers, thereby helping in performance practice, composition, or arrangement activities.

The automatic performance device using the performance information detection and storage device of the present invention having such functions and effects can be extremely useful in applications such as unmanned demonstration performance of electronic musical instruments, simulation of electronic musical instruments, performance training system of electronic musical instruments, etc. It is beneficial.

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 in which keyboard information can be handled digitally.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an automatic performance device for an electronic musical instrument according to an embodiment of the present invention, and FIGS.
The configuration diagrams of the converter, Figures 3a and 3b, are shown in the above A-D.
This is a detailed configuration diagram of the converter, in detail, a top view of the code plate, a sectional view thereof along the line ■B-■B, Figures 4a and 4b.
The figure is a wiring diagram of the analog electronic switch circuit used in the above embodiment, FIG. 5 is a block diagram showing details of the performance information processing device of the apparatus shown in FIG.
This is a diagram for explaining the information processing operation of the device shown in the figure.

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, 11111-Output amplifier, 12
...Speaker, 13 ...Electronic switch for vibrato, 14 ...Vibrato oscillator, 1
5...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... Flipflop, 66...
・Or gate, 67, 89...and gate,
91...Read-only memory l892...
- Control processor, 94...Cassette tape memory, 93, 95...First in first out memory, 133, 143...
Switching circuit, 150... Rotating shaft, 151
... code plate, 154 ... sliding member,
160a, 160b...Nand Gate.

Claims (1)

[Claims] 1 Digital performance information corresponding to the displacement of multiple operators is extracted at a predetermined cycle and compared at each successive cycle, and if the compared signal states do not match, it is indicated that a change has occurred in the performance state. a device that generates an event signal, a control operation state display signal indicating a control operation state whose signal state has changed in accordance with the event signal from among periodically extracted digital performance information; a device for selecting a digital signal consisting of a control state display signal indicating a change in state signal state; a device for generating a relative time signal indicating a relative time between the event signals; 1. A performance information detection and storage device comprising: a storage device for storing a relative time signal, and is capable of detecting and storing the digital performance information in a compressed form.