JPS6032874B2 - Group performance training device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a group performance training device for efficiently teaching musical instrument performance techniques such as an electronic organ to a large group of students, and in particular simplifies the control signal generation circuit. This invention relates to a group performance training bag that has been improved so as to achieve a significant cost reduction.

Generally, in a group performance training device, a number of slave units are connected to one base unit, and an electronic musical instrument and a communication device are placed in the base unit and each slave unit, so that the master unit is in charge of the role of the master unit. A teacher or instructor calls one or more specific students on the handset side and gives them guidance or advice or listens to a model performance,
Alternatively, a student on the slave device can call the instructor on the parent device and ask questions as appropriate.

In addition to controlling calls from the base unit to the slave unit and from the slave unit to the base unit as described above, in this type of device, the base unit also controls the voice ranges that are forced on the slave unit. You can instruct the slave unit to select the volume level, instruct the slave unit to connect a tape recorder or other external teaching materials, and the slave unit can also answer or give answers to questions posed by the parent unit. Various controls are now in place to display accurate information. Normally, in order to carry out these various controls, the electronic musical instruments of the master unit and each slave unit have control signal generation means including operating switches such as pushbutton switches, and control signal generation means that respond to control signals from these switches. A control circuit for performing necessary control operations is provided. In group performance training devices that have been proposed in the past, various operation switches and various displays are arranged on the front panel of the electronic musical instrument, and a control circuit is usually built into the main body of the musical instrument.

However, such a configuration requires extra space to arrange switches and indicators on the panel surface of the electronic musical instrument, and also requires space and special ingenuity to arrange the control circuit inside the electronic musical instrument. is required. In other words, this means that the electronic musical instrument used in the group performance training device must be specially designed and manufactured to suit this purpose, and the overall performance of the group performance training device This was one of the major causes of rising costs. In particular, the parent electronic musical instrument must be equipped with a display that has more operation switches and displays than the number of slave units, and various control circuits associated with this. Compared to ordinary electronic musical instruments that are not used for teaching purposes, and even compared to electronic musical instruments for slave devices, a complex, large, and expensive device was required, with a significantly different structure. An object of the present invention is to provide a novel group performance training device that eliminates the momme point of the prior art described above and allows the use of inexpensive ordinary electronic musical instruments.

One feature of this invention is that switches such as key switches and function switches that are originally provided in electronic musical instruments are used as means for generating various control signals required for performance training. be.

According to this feature, the extra panel area that was conventionally required for arranging a button switch for selecting a slave unit, etc. is completely unnecessary, and the external structure of the electronic musical instrument can be simplified. Another feature of the present invention is that the control circuit that performs necessary controls regarding performance training in response to control signals is configured as a separate device from the main body of the electronic musical instrument, and this control circuit device includes The third control signal is an operation switch identification signal derived from the main body of the musical instrument and added thereto.

Here, the operation switch identification signal is a signal that indicates which switch is being operated among the switches originally owned by an electronic musical instrument, such as a key switch and a function switch. , which is inevitably generated in general electronic musical instruments due to the necessity of synthesizing musical tone signals. That is, in the present invention, the operation switch capture U signal inevitably generated inside the musical instrument is taken out of the musical instrument body, added to the control circuit, and used as a control signal. According to these features, it becomes possible to use Takitsune's electronic musical instrument, which is not for group performance training equipment, for Kameko musical instruments, especially as electronic instruments for the main unit, and the cost of the group performance training equipment as a whole can be significantly reduced. It becomes possible to reduce the In practice, the control circuit device is
It is preferable to configure the electronic musical instrument so that it can be layered on the electronic musical instrument as a single unit including the display. The invention will now be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 shows a group performance training program according to an embodiment of the present invention.
By operating a specific one or more of the fixed key switches, one or more of the 28 handsets in four groups can be selected or called.

The base device 10 includes an electronic musical instrument 12 for instructors, a communication device 14, and a control circuit 16, and the control circuit 16 includes:
Signal processing device 18, switch device 20, and display device 2
Contains 2. A total of 28 slave units 24 are connected to the base unit 10', and these slave units are divided into four groups, each group including seven slave units. The slave units MAI to MA7 are in the first A group, and the slave units MBI to M
B7 is assigned to the second B group, and slave units MCI to MC7 are assigned to the third group.
The slave units MDI to M Town 7 belong to the fourth D group, respectively. Each of these child units 24 is equipped with an electronic musical instrument 26 for students and a communication device 28. In the master device 10, the electronic musical instrument 12 synthesizes musical tone signals of note names corresponding to the operated key switches with the help of digital data processing technology, as an example of its configuration will be shown later with reference to FIG. It is something.

The digital musical tone signal synthesized within the crab musical instrument 12 is converted into an analog musical tone signal AMT. analog musical tone signal AM
The T is converted into a musical tone by a speaker attached to the main body of the musical instrument, and is also provided to the communication bag pupil 14. The communication device 14 includes a microphone MPI and a microphone MPI.
An amplifier 30 amplifies the output signal of the electronic musical instrument 12, and one input terminal receives the output signal of the width amplifier 30, and the other input terminal receives the analog musical tone signal AMT from the electronic musical instrument 12 to teach performance to the slave unit. A mixing amplifier 32 that sends out audio signals and/or musical tone signals related to performance training, an amplifier 34 that receives audio signals and/or musical tone signals related to performance lessons sent from the child device side, and an output terminal of the amplifier 34 at one input terminal. A mixing amplifier 36 that receives signals and receives an output signal of the mixing amplifier 32 at the other input end, and a headphone HPI that receives the output signal of the mixing amplifier 36 are provided.

In the communication device 14 having such a configuration, it is possible to transmit various performance training information in the form of audio signals or musical tone signals from the parent unit to the slave unit, and also to transmit similar information sent from the slave unit. It is possible to receive performance training information. That is, the instructor in charge of the master unit can give various instructions and advice to the students on the slave unit side using the microphone M-1, and can operate the electronic musical instrument 12 to have the students listen to a model performance. The audio signal and musical tone signal generated at this time can be monitored using the headphones HPI. In addition, headphones H
You can use the PI to listen to questions and performance sounds from the handset.
It is preferable that the communication device 14 is constructed so that it can be used as a unit of equipment separate from the electronic musical instrument 12 and used on the electronic musical instrument 12. The control circuit device 16 receives the key code signal KC and the synchronization code signal 2 derived from the electronic musical instrument 12, and mainly controls the selection of the handset.

It also includes a function of visually displaying the results of the control and a function of controlling the electronic musical instrument 12 to stop producing sound due to the control. The key code signal KC was originally used to detect which key switch was operated when three musical tone signals were digitally synthesized within the electronic musical instrument 12, or in other words, which note name was selected for pronunciation. It is generated from
It is a digital signal that can identify the operated (usually turned on) key switch or the corresponding note name. In this embodiment, the key code signal KC is, for example, composed of a 7-bit binary code signal to which 3 bits are allocated for octave identification and 4 bits are allocated for note identification. In accordance with the teachings of the present invention, the key code signal KC is derived from the electronic musical instrument 12 along with the synchronization signal and supplied to the signal processing unit 18 of the control circuit arrangement 16. The signal processing device 18 receives the key code signal KC and the synchronization signal ~,
By applying appropriate signal processing to these received signals, control signals for selecting one or more specific handsets are formed, and these control signals are used for switching and display counterfeiting 22.
Send to.

Further, the signal processing device 18 has a mode changeover switch as will be explained later with reference to FIG. 2, and the performance mode or slave device selection mode can be appropriately selected using this switch. The mode designation signals Mo, Mo sent from the signal processing device 18 are sent to the electronic musical instrument 1, respectively.
2, added to the display device 22; When in performance mode,
The signal ground becomes a high level, making it possible to synthesize musical tone signals in the electronic musical instrument 12. On the other hand, when in slave device selection mode, the signal Mo becomes a low level, making it impossible to synthesize musical tone signals in the electronic musical instrument 12. . The display device 22 visually displays such a mode selection state. Switch device 2
0 includes five-point control switches connected to signal transmission lines connecting the base unit 10 and each slave unit 24, respectively.

In other words, since each of the 28 slave units has a pair of signal transmission lines for transmission and reception, it is necessary to connect a pair of control switches corresponding to the pair of signal lines for each slave unit. Yes, control switches SA1a and S for slave unit MAI
A1b is the control switch SA2a for the slave unit MA2.
and SA2b are provided, and in the same manner, two control switches are provided for each child device. Control switches SD7a and SD7b are provided for the last slave side D7. One of the coarse control switches SA1a to SD7a is for controlling communication from each child unit 24 to the base unit 10, and the other coarse control switch SAIb to SD7b is for controlling communication from each slave unit 24 to the base unit 10.
This is for controlling communication from 0 to each slave device 24. In this embodiment, the correspondence relationship shown in the table below is established between the key switches with 4-note names of C, to C5, and the selected handset, and thereby one or more specific key switches By turning on the button, it is possible to control the selection of one or more specific slave devices.

Therefore, since the electronic musical instrument 12 does not have a special operation switch for this kind of handset selection control, the configuration of the panel surface of the electronic musical instrument 12 is the same as that of a transparent electronic musical instrument. Phonetic name Selected handset C5・・・・・・・・・・・・・・・・・・・・・・・・
...All slave units B4. ．．・・・．・・・・・・・・・・・・・・・・・・M
AI......MA2G4......
………MA3 F4……………………………………MA4 E4………………. ……………MA5 D4…………………………MA6 C4………………………………MA7 B…………………………………………MBI Hmm… ………………………MB2 G3…………………………M old 3 F3….・…………………………M old 4 E3….・・・・・・・・・・・・・・・・・・・・・M old 5D3...
…………………………M old 6C3 …………………………
......M Old 7B......M
CI-・・・・・・・・・・・・・・・・・・・・・・・・MC2G2
………………………MC3F2・・・・・・・・・・・・・・・
・・・・・・・・・MC4E2・・・・・・・・・・・・・・・・・・
...MC5D2...・・・・・・・・・・・・・・・
・...MC6C2・. ．．・・・・・・・・・． ……”
MC7B…………………………MDIA,………………
・・・・・・・・・・・・・・・・・・MD20.・・・
・・・・・・・・・・・・・・・MD3F.・・・・・・・・・
・・・・・・・・・・・・・・・・・・MD4E、..."..."
......"・"・MD5D, .........
……M Town 6C,…….・・・・・・・・・M Town 7 As is clear from the above table, in this example, apart from the Ona keys, the white keys are used to select 28 fixed slave units, and the black Ren allows you to select four groups of slave devices.

By the way, in the switch device 201, a control signal is applied to each control switch from the signal processing device 18 so as to enable the handset selection control shown in the table above.

For example, a control signal generated corresponding to the note name is applied to each control input terminal of the control switches SA1b to SD7b, and when the key switch corresponding to the note name is turned on, this control signal goes to a high level. When this happens, the base unit 10 and all slave units 24 are communicably connected to each other via their control switches. Further, control signals generated corresponding to the pitch names B4, B4, etc. are applied to the control input terminals of the control switches SA1a and SA1b, the control input terminals of the control switches SA2a and SA2b, etc., respectively. These control signals are set to a high level when a specific black key is operated to select a group of slave units, or when a specific 10 or more white keys are operated to select one or more slave units. When these control signals become high level, the corresponding control switches are turned on, and the corresponding slave units and the base unit 10 are interconnected so as to be able to communicate with each other. The display device 22 has a structure in which a light emitting indicator such as a lamp or a light emitting diode is arranged on a display panel, and displays one or more specific handsets selected as a result of the handset selection control described above. It is for display. "All call" indicates that all handsets are being called, and a signal indicating the state of the key switch corresponding to pitch name C5 is added to the input terminal of the display device indicating this. Further, "MAI" to "MD7" all indicate the name of the handset, and a signal indicating the state of the key switch corresponding to the individual handset is added to the input terminal of the display device that indicates these. Furthermore, a mode designation signal is added to the display that instructs the evening "mode", and when the handset selection mode is entered, the signal Mo goes to a high level, indicating the "mode".
The display lights up. Like the signal device 14 and 0, the control circuit device 16 described above is preferably constructed so that it can be used on the electronic musical instrument 12 as a unit of device separate from the Atsuko musical instrument 12.

In this way, by configuring the communication device 14 and the control circuit device 16 separately from the electronic musical instrument 12, the electronic musical instrument I
2, no special design or innovation is required, and ordinary electronic musical instruments can be used. Each slave unit 24
As shown in the typical configuration of the slave unit MAI, it is equipped with an electronic musical instrument 26 similar to the electronic musical instrument 12 described above, and a communication device 28 similar to the communication device 14 described above, and is different from the master unit 10 for control. The only difference is that nothing corresponding to the circuit device 16 is provided.

In the communication device 28, MP2 is a microphone;
The output from this microphone is fed via an amplifier 40 to one input of a mixing amplifier 42. electronic musical instrument 26
The musical tone signal from the mixer amplifier 42 is supplied to the other input terminal of the mixing amplifier 42. Therefore, the mixing amplifier 42
The audio signal from the fin instrument 26 and/or the musical tone signal from the fin instrument 26 are sent to the base unit 10. An audio signal and/or a musical tone signal sent from the base device 10 regarding performance training is supplied to one input terminal of a mixing amplifier 46 via an amplifier 44, and a mixing amplifier 42 is connected to the other input terminal of this mixing amplifier 46. The output signal of is added. Headphones H
P2 is connected to the output terminal of the mixing amplifier 46, and is used to listen to transmitted and received audio signals and/or musical tone signals. The above handset configuration is based on the handset MAI.
The same applies to other slave units, and such a slave unit configuration enables necessary mutual communication regarding performance training between the base unit 10 and each slave unit 24. Next, the electronic musical instrument 12 and the signal processing device 18 will be explained with reference to FIG.

The electronic musical instrument 12 generates a 7-bit digital key code signal KC for identifying the operated key switch by sequentially and repeatedly scanning a large number of key switches 50 provided for each note name. A pitch name detection circuit 52 is provided.

The key code signal KC is generated by performing an AND operation on each bit of the signal KC and the mode designation signal Mo.
The signal is supplied to a channel assigner 56 via an AND gate circuit 54 including two AND gates. Next to the channel assigner 56, a 1M digital tone forming channel 58 (CHI to CHho) corresponding to the maximum number of keys that may be operated simultaneously is provided. Every time an operation is detected, an available channel is searched and a key code signal KC is supplied to the available channel. Each musical tone forming channel has a pitch (
A musical sound waveform that generates a clock signal with a frequency (nf) that is n times the frequency f corresponding to the octave and note) and that is digitally stored in the form of an amplitude value or its increment value with respect to n sample points. is read out in accordance with the clock signal, thereby forming a digital tone signal having a note name corresponding to the note name of the operated key switch. This type of digital tone forming method has basically already been published in US Pat. No. 3,515,792. Digital musical tone signals MTI to MTIO generated from each channel are summed by an adder circuit 60, and the summed digital musical tone signal MT is converted by a D/A converter circuit 62 into a corresponding analog musical tone signal AMT. The analog musical tone signal AMT is guided to a speaker 66 via an output amplifier 64, where it is sounded as a musical tone. Output amplifier 64
The analog musical tone signal AMT as an output is also supplied to the mixing amplifier 32 in the communication device 14 of the base unit 10 described above. Here, referring to FIG. 3, note name detection circuit 52
An example will be explained.

In FIG. 3, 50 indicates a group of key switches provided for each note name, MK indicates a key switch corresponding to a manual key, and PK indicates a key switch corresponding to a pedal key. Decimal / 1 dollar switching type counter 100'
Well, as shown in Fig. 4, after being cleared by the clear input CL, if the output of the OR gate 108 is at a high level, the input is in the 12 mode, and if the output of the OR gate 108 is at a low level, the input is in the 13-ship mode. It counts the clock signal a.

The 4-bit parallel output of counter 100 is supplied to a decoder 102, which decodes the input signal to produce a sequential pulse signal for key switch scanning (/to scanning). The quinary counter 104, which is cleared by the clear input CL, counts the clock pulses generated one by one every 12 or 13 counting operations of the counter 100, and supplies its 3-bit parallel output to the decoder 106. The decoder 106 decodes the input signal to create a sequential pulse signal for octave scanning. G. ~C2#
Key switches with pitch names of C2 to Co are divided into three groups of 12, and 13 key switches with pitch names of C2 to Co.
Since each key switch is divided into two groups, when scanning the key switches in the first three groups, the counter 100'
The counter 100 must be hexadecimal when scanning the latter two groups of keyswitches. In order to switch the count mode of the counter 100 in this way, "0" and "1" of the decoder 106
, "2" is provided, and the OR output of this OR gate 108 is connected to counter 1.
00 as a mode switching input. When the decoder 106 generates a high level signal for the key switch of note names C5 to C#, one of the inputs of the OR gate 108 becomes a high level, and its output becomes a high level,
The counter 100' operates in a hexadecimal counting mode. Otherwise, the output of OR gate 108 will be at a low level and counter 100 will operate in a 13 count mode. On the other hand, two inputs A, which input the "0 and 1 power of the decoder 102 and the 0 and 1 power of the decoder 106"
An ND gate 110 is provided, and this AND gate 110
The output of is used to generate a synchronization signal as shown in FIG. That is, the output of AND gate 110 is the clock signal? D (delay) timed at - is applied to the input of the flip-flop and to the input of AND gate 114. AND gate 114 is A
The output of the ND gate 110 and the Q output of the D flip-flop are ANDed to generate a synchronization signal in the form of digitally differentiated output of the AND gate 110, as shown in FIG. The AND output of AND gate 114, ie, the synchronization signal Xo, is applied to a D flip-flop 116, which is timed by a clock signal, while being sent to signal processing unit 18 and channel assigner 56. The Q output of the D-flip-flop 116 is then supplied to one input terminal of an AND gate 118. Since the clock signal ◇ is applied to the other input of the AND gates 1, 1, and 8, the clock signal a input to the counter 100 is the AND of the Q output of the D-flip-flop 116 and the clock signal 0. The resulting signal becomes a pulse train with missing pulses as indicated by the broken line p in FIG. As a result, the counter 100 has a period T from the time to when it is cleared by the clear input CL to the time when the pulse p is to be generated, and a period L (
t, - et al), the count value continues to be 0. During these periods T and T2, the counters 100, 104
Since both have a count value of 0, the decoders 102 and 10
6's "0" output becomes high level. Here, decoder 1
02's "0 first generation power" has an inverter 120 at one input end.
is applied to the other input terminal of the AND gate 122 which receives the synchronized note number via the key switch, and the output of this AND gate 122 is applied to the key switch corresponding to the note name. It is only during the period T2, not between the periods L and T2, that the output becomes a rotary bell and the key switch corresponding to the note name is scanned. After all, during the first period L, the AND gate 114
Only the synchronization layer symbol is generated from the output side of the key switch, and the scanning of the key switch corresponding to the note name is not performed until the next period T2. From this point on, the counter 100 counts up the pulses of the clock signal ◇a one by one, and the counter 104 counts up the output pulses of the printer 100 one by one. The key switches corresponding to &, #...Co are scanned. In FIG. 3, in order to detect the operated key switch, each of the five groups of key switches has AND gates 124, 128, and 132.
, 136, 140 are connected, and OR gates 126, 130, 1 are connected corresponding to these gate circuits, respectively.
34,138.142 are provided. AND gate circuits 1 24, 1 28, 1 32 each include 12 AND gates, and each of these AND gates receives a signal from a corresponding key switch and a corresponding decoder output.
” and “output of 1re ``2''). Furthermore, the AND gate circuit 136,
140 each include 13 AND gates, each of which AND gates receives a signal from a corresponding key switch;
3” with the corresponding decoder output. The output of "4") is ANDed. OR gates 126, 130, 134, 138, 140 correspond to AND gate circuits 124, 128, 132, 13, respectively.
6,142 outputs are ORed to form a 5-input OR gate 14.
Send to 4. As a result of the above logic configuration, the output KS of the OR gate 144 becomes a signal that takes a high level every time any key switch is turned on. In other words, the signal KS is a signal indicating that one of the key switches is being operated, and is referred to as a key-on signal for convenience. On the other hand, the 4-bit parallel output of the counter 100 and the 3-bit parallel output of the counter 104 are led to an AND gate circuit 152.

The input side of this AND gate circuit 152 has a counter 1
A 4-input PR gate 146 that receives the 4-bit parallel output of 00 in parallel, and an AND gate that receives the "8" output of the counter 100 on one input and the output of the NOR gate 146 on the other input. 148, and an AND gate 150 which receives the output of the counter 100 on one input and the output of the NOR gate 146 on the other input. 150', pitch name C5, C4
,C3,C2,C. Note code for “0000
" to "1010", and by providing these gates, the pitch name C5,
The note codes of C4, C3, C2, C, . . . Co are all now represented by "1010". AND gate circuit 152 includes seven AND gates, each AND gate having a respective bit of the 7-bit code input and a key-on signal K.
AND is performed for each of S and S.
As a result, the key code signal KC is transmitted to the key switch circuit 50.
The seven ANs in the circuit 152 are activated every time one of the key switches in the circuit 152 is turned on and the key-on signal KS becomes high level.
It is composed of 7-bit parallel outputs generated from the D gate in a time-division manner, and indicates the note name of the turned-on key switch using an octave code and a note code. This key code signal KC is the AND signal of the electronic musical instrument 12 mentioned above.
While being sent to the gate circuit 54, it is also sent to the signal processing device 18 of the control circuit device 16 together with a synchronizing signal. Here, referring again to FIG. 2, the signal processing device 18 will be explained. The signal processing device 18 receives the above-mentioned key code signal KC and synchronization signal F sent from the electronic musical instrument 12 in a time-division manner. In addition, operating power and a clock signal 0 are supplied from the electronic musical instrument 12 to the signal processing device 18, but the illustration of the supply scheme is omitted in FIG.
The key code signal KS and the synchronization signal Xo are sent to the OR gate 70.
where the bit-serial time-division multiplexed signal T
Converted to DM. In this signal TDM, pulses indicating the on/off state of the key switch corresponding to each note name such as Q, &, to #, etc. are arranged in a large number of time slots following the synchronization pulse ~. However, in order to obtain a similar signal, the aforementioned key-on signal KS may be input to the OR gate 70 instead of the key code signal KC. The time division multiplexed signal TDM is input to the serial input device of the shift register 72. The shift register 72 is constructed by vertically connecting 49 flip-flop stages corresponding to the four note names C, to Q, and is timed by a clock signal as shown in FIG. A synchronizing signal is applied to the clear input terminal of the shift register 72. Connected to the serial output of shift register 72 is a D-flip-flop 74 timed by clock signal 0. The reset input terminal R of the R-S flip-flop 76, which receives the synchronization bond number at the set input terminal S, has an input terminal 7 at one face input terminal.
The synchronizing signal ~ is received through the input terminal 8, and the Q output of the flip-flop 74 is received at the other input terminal. AN
The output of D gate 80 is connected, and this circuit arrangement causes R-S flip-flop 76 to operate in set priority mode. The Q output of flip-flop 76 is applied to a D-flip-flop 82 which is timed by a clock signal. - The remaining input terminal of the AND gate 84 which receives each Q output of the flip-flops 74 and 82 is connected to the inverter 8 from the mode changeover switch 86.
A mode designation signal Mo is supplied via 8. A high level signal "H" instructing the performance mode is applied to one fixed contact a of the mode changeover switch 86, and a low level signal "L" instructing the slave unit selection mode is applied to the other fixed contact b. ” has been added. The mode designation signal Mo taken out from the movable contact c of the switch 86 is sent to the AND gate circuit 54 of the electronic musical instrument 12, while the inverter 8
8, the signal is converted into an inverted signal signal and input to the mode indicator of the display device 22. The parallel output terminal of the shift register 72 includes an AND gate with a total of 4 g, each corresponding to each flip-flop stage of the shift register 72.
A gate circuit 90 is connected.

Each AND gate in circuit 90 connects shift register 7
Each bit of the parallel output of 2 and the output of the AND gate 84 are ANDed.
The respective AND outputs are supplied in parallel to four T (trigger)-flip-flops (FF) in the memory circuit 92, respectively. These T-flip-flops hold or store the key-on data sent from the shift register 72 via the gate circuit 90 when a certain key switch is turned on until the same key switch is turned on again. It is something to do. The operation of transferring key on/off data from the shift register 72 to the storage circuit 92 via the gate circuit 90 will now be described with reference to FIG.

The shift register 72, which is timed by the clock signal, is cleared by the synchronization signal F, and at the same time, the set priority flip-flop 76 is set by the synchronization signal F. On the other hand, the synchronizing signal input to the shift register 72 via the gate circuit 70 passes through each stage of the shift register 72 to
- Since the Q output of the flip-flop 76 is supplied to the flip-flop 74, the Q output of the flip-flop 76 remains at a high level until the synchronous circuit appears at the output of the D-flip-flop 74, as shown in FIG. When the synchronizing signal appears at the output terminal of flip-flop 74, a reset signal is applied to flip-flop 76 via AND gate 80, and flip-flop 76 is reset. As shown in FIG. 5, the Q output of flip-flop 82 is the Q output of flip-flop 76 delayed by 1 bit time, so an AND gate 84 selects the Q output of flip-flop 82, the Q output of flip-flop 74, and the mode. If you AND with the designated signal pigeon, you will receive a gating pulse GP.
can be generated. Here, it is clear that the gating pulse GP can be generated only when the slave unit selection mode is selected by the mode changeover switch 86 (that is, when the signal Mo is at a high level).
When the gating pulse GP is generated, in the shift register 72, key on/off data is arranged in each flip-flop stage for each note name. Therefore, at the time when the next gating pulse GP' (not shown) is generated, the key-on and off-delays for all notes C, . Gating pulse GP'
The AND condition with the on data of the key switch corresponding to the key switch turned on during the note name of C, to G is established, and the corresponding T-flip-flop is stored in the storage circuit 92 for the on-day off. As described above, this data storage continues until the next on data arrives, specifically, until the same key switch is turned on again. As described above, on the output side of the memory circuit 92, operation status signals are generated in parallel that indicate whether the key switches for each of the note names C, ~, are in the ON or OFF operation status. Moreover, even if the on operation of the key switch is stopped, these operation status signals continue to be generated due to the memory function of the T-flip-flop until the same key switch is turned on next time. On the output side of the memory circuit 92,
In order to enable the handset selection control shown in the table above, the operation state signals corresponding to each note name are combined, except for the operation state signal corresponding to the note name.

The operation state signal corresponding to pitch name C5 is sent as it is to the switch device 22 as a control signal for selecting all child devices. A
4#, G4#, F4#...F, #, D, #, C. #
The operation status signals corresponding to the pitch names of black keys, such as , are divided into four groups for each octave, and the OR
These OR gates output OB to group selection signal G, respectively.
, GC, and GD are generated. The operation status signals corresponding to the note names of the remaining white keys are divided into four groups for each octave, and OR gate circuits 96A, 96B, 9
It is input to 6C and 96D. These OR gate circuits 9
Seven two-input OR gates are arranged in each of 6A to 96D. Each OR gate in the OR gate circuit 96A has pitch names B4, A4, G4, F4, E4,
The operation state signals corresponding to D4 and C4 are ORed with the A group selection signal GA, and the output side of the OR gate circuit 96A is connected to the pitch name B.
4, A4, G4, F4, E4, D4, and C4, respectively, are generated. Control signals for slave device selection are generated in the same manner for the other OR gate circuits 96B, 96C, and 96D. To illustrate the operation of generating the control signal for slave device selection with respect to the OR gate circuit 96A,
When the operation status signal corresponding to any black key note name (F#, G4#, F4#, etc.) becomes high level, the OR gate 9
Since the A group designation signal CA output from 4A becomes the high level, all the seven slave device selection control signals of the OR gate circuit 96A become high level, making it possible to select the A group slave device. In addition, when none of the black keys is turned on and the A group selection signal GA is at a low level, the note names B4, G4
, F4, D4, and C4, only the handset control signal corresponding to the one turned on becomes high level, and individual handset selection becomes possible. Such slave device selection control signal generation operation is performed by other OR gate circuits 96B and 86.
The same applies to C and 86D. In the operation of the group performance training device configured as described above, in order to select one or more specific slave units, first, move the movable contact c of the mode changeover switch 86 to the fixed contact b in order to set the operation mode to the slave unit selection mode. contact with.

As a result, the mode designation signal Mo becomes low level "L", so each gate of the gate circuit 54 in the electronic musical instrument 12 is closed, and the key code signal KC is transferred to the channel assigner 5.
Therefore, no matter how many key switches are operated, the electronic musical instrument 12 does not synthesize musical tone signals.
You won't even be able to pronounce it. On the other hand, since the mode designation signal is at a high level "H", the display device 22 displays a message indicating that the handset selection mode is being operated, and the AND
The gating pulse GP shown in FIG. 5 from the gate 84
will now occur. Here, in the electronic musical instrument 12, when a key switch corresponding to, for example, pitch name C5 is turned on, a key code signal KC for identifying this pitch name C5 is generated in the pitch name detection circuit 52, and a synchronization signal is generated along with a signal processing device. 18. Similarly, B4 to C. When a key switch corresponding to an arbitrary note name is turned on, a key code signal KC identifying the turned-on key switch is sent to the signal processing device 18 along with a synchronization signal. As described above, such a key code signal KC is converted into a time division multiplexed signal TDM by the gate circuit 70, and this time division multiplexed signal TDM is inputted to the shift register 72.
As a result, the on/off state of the key switch is reproduced in the shift register 72 for each note name. The ON data specifying the key switch that has been turned on is transferred to the storage circuit 92 via the gate circuit 90 in synchronization with the generation of the gating pulse GP, where it is kept constant until the same key switch is turned on next time. stored for a period of time. Since the memory circuit 92 continues to output the on-state signal corresponding to the turned-on key switch for a certain period of time, the control signal for selecting all slave units corresponding to the note name and the individual slave units from the gate circuits 96A to 96D are output. The machine selection control signal is stably generated during the fixed period. As is clear from Fig. 1, when the key switch corresponding to pitch name C5 is turned on, the control switches SA1b, SA2b...SA7b are closed, so all child units MA1, MA2...MD7 are turned on. Connected to base unit 10. In this case, the instructor of the base unit 10 can give guidance or advice to the slave unit via the microphone MPI, or can switch the mode changeover switch 86 to the performance mode (by touching the movable contact c to the fixed contact a). ), then the performance sound of the electronic musical instrument 12 can be heard on the slave device side. Also, if you want to select all slave units belonging to a certain group, you only need to turn on one of the key switches with the corresponding Kurokami Rennon name, and then select one or more slave units individually. Furthermore, when selecting one or more child units individually, it is sufficient to turn on the key switch of the corresponding one or more white key note names. In these cases as well, it is possible to talk to the handset side and have the handset side listen to a model performance, as in the case of all handset selection described above. In addition,
The operating mode and the name of the selected handset are displayed on the display device 22. To return the above-mentioned handset selection state to the non-selected state, with the mode changeover switch 86 set to the handset selection mode, turn on the same key switch that was turned on when selecting the handset. do it. That is, by doing this, one or more flip-flops in the set state in the memory circuit 92 are reset, so the slave unit selection control signal, which was at a high level, becomes a low level and is no longer on. The control switch is turned off, and the communication path between the parent device and the child device is cut off. When the above-mentioned handset selection operation is not performed, by setting the mode selector switch 86 to the performance mode, the electronic musical instrument 12 of the base unit 10 can be played independently of the handset side. Become.

Although preferred embodiments of the present invention have been described in detail above, it goes without saying that the present invention is not limited to the above embodiments and can be implemented in various modified forms.

For example, in the above embodiment, the case where the base unit calls the slave unit is illustrated, but the present invention can also be implemented in the same way by using the key switch of the electronic musical instrument on the slave unit side when the slave unit calls the base unit. can. Furthermore, in the above embodiment, the key switch is provided with both musical tone selection and handset selection functions, but the idea of the present invention is to force the handset to select a range or volume, and to Naturally, the present invention can also be applied when controlling connection with teaching materials (tape recorders). Furthermore, when using a type of digital electronic musical instrument in which function switches other than key switches are scanned in a time-divisional manner, these function switches can also be used as control signal generating means. Note that the present invention is not limited to the use of a digital electronic musical instrument that digitally synthesizes musical sound signals, but also uses an electronic musical instrument of a type that generates a signal that identifies an operated key switch. It can be generally applied in any case.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing the entire group performance training device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the detailed configuration of an electronic musical instrument and a signal processing device in the device of FIG. 3 is a block diagram showing details of the pitch name detection circuit in the electronic musical instrument shown in FIG. 2, FIG. 4 is a time chart for explaining the operation of the circuit shown in FIG. 3, and FIG. 3 is a time chart for explaining the operation of the signal processing device shown in the figure. 10...Base unit, 12,26...Electronic musical instrument, 14,28.
... Communication device, 16 ... Control circuit layer,
18... Signal processing device, 20... Switch device, 22... Display device, 24...
·Cordless handset. Figure 5 Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. An electronic musical instrument in which an operating switch identification signal indicating which switch is being operated out of the originally provided switches such as a key switch is generated internally by a parent. A group performance training device disposed in the electronic musical instrument or in any of the slave devices, comprising: a control circuit device that performs necessary control regarding performance training in accordance with a control signal; and a control circuit device that derives the operation switch identification signal from the electronic musical instrument and transmits it to the electronic musical instrument. A group performance training device comprising: a device for supplying a control signal to the control circuit device. 2. When an electronic musical instrument that is designed to generate an internal switch identification signal indicating which switch is being operated out of the switches that are originally equipped, such as a key switch, is connected to the base unit or any of the slave units. A group performance training device comprising: a control circuit device that is configured separately from the electronic musical instrument and performs necessary control regarding performance training according to a control signal; and a control circuit device that derives the operation switch identification signal from the electronic musical instrument. and a device for supplying the signal to the control circuit device as the control signal.