JPH0343636B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic performance device suitable for performance practice by beginners, etc., which automatically changes and controls the volume of a first melody or a second melody based on volume control data read from a memory. It has been made possible.

2. Description of the Related Art Conventionally proposed automatic performance devices include devices that automatically generate melody sounds based on note data read from a memory. In such a device, an obbligato sound can be generated by the same means as the melody sound generating means, but the volume of the obbligato sound needs to be adjusted appropriately as the melody progresses, and beginners etc. cannot manually adjust the volume of the obbligato sound. It's not easy to do.

Therefore, the object of this invention is to
To provide a new automatic performance device that can automatically change and control the volume of a melody.

The automatic performance device according to the present invention stores volume control data together with note data in a storage device, and automatically controls the volume of the first melody or the second melody based on the volume control data read from the storage device. The embodiments shown in the accompanying drawings will be described in detail below.

1 to 3 show the circuit configuration of an electronic musical instrument according to an embodiment of the present invention. FIG. 1 mainly shows the score data importing section and the melody data processing section, and FIG. 2 mainly shows the obbligato data processing section. FIG. 3 mainly shows the start/stop control section and the autorhythm section.

In FIG. 1, a musical score sheet 10 has music written on its surface in accordance with musical symbology, and a data recording section 12 made of magnetic tape or the like is attached to the margin near the lower end of the sheet surface. It is provided. The data recording section 12 records musical score data for automatically playing the music written on the surface of the sheet.

The reading device 14 reads musical score data from the data recording section 12 of the musical score sheet 10, and stores the read data in bit serial form in RAM (random memory).
(access memory) write control circuit 16.

The RAM write control circuit 16 converts the bit-serial score data from the reading device 14 into bit-parallel score data DA as shown in the format of FIG. 4, and also determines the data type and outputs a write command signal. It is designed to generate M ₁ to _{M 5} .

In Figure 4, RS is rhythm type data,
MEP is melody pitch data, MEL is melody note length data, OBP is obbligato pitch data,
OBL is obbligato note length data, MK ₁ ,
MK ₂ , MK ₃ , MK ₄ , MK ₅ are data RS,
This is a mark code to identify MEP, MEL, OBP, and OBL.

Rhythm type data RS consists of a code that indicates the type of rhythm (for example, waltz) suitable for the music on the sheet surface, and other data MEP,
MEL, OBP, and OBL are arranged as shown in FIG. 5 as an example. In other words, melody pitch data
MEP contains rest data and pitch data corresponding to the note progression of the melody part of the musical score. Each rest data consists of a code with all bits "0", and each pitch data consists of an octave code and a note code. It is made up of a combination of In this example, only rest data is included in the four measures of the prelude and the interlude, and rest data is included as appropriate in other parts, mainly pitch data. Melody note length data MEL
contains note length data corresponding to the note progression of the melody part, and each note length data consists of a chord corresponding to the length of a rest or note.

The obbligato pitch data OBP includes rest data and pitch data similar to the melody pitch data above, corresponding to the note progression of the obbligato part of the score, as well as chord data for the auto bass chord.
CHD ₁ , CHDk, CHDl, etc., and volume control data for obbligato volume control VOL ₁ (H), VOLk
(L), VOLl(H), VOLm(L), etc. The chord data includes the root note name and chord type (e.g. mejiya,
It consists of a code indicating a minor, seventh, etc.), and if it is a rest, all bits are set to "0". Also,
As for volume control, for example, volume control data VOL ₁ (H) and VOLl (H) are used to increase the volume of the obbligato in the prelude and interlude parts, and volume control data VOLk (L) and VOLm (L) are used in other parts. ) reduces the volume of the obbligato.
Note that the last part of the obbligato pitch data OBP includes an end code that indicates the end of automatic performance.

The obbligato note length data OBL includes note length data similar to the above-mentioned melody note length data corresponding to the note progression of the obbligato portion, and also includes rhythm control data RMC ₁ , RMCk, RMCm, and the like.
The rhythm control data RMC ₁ for the prelude section is for initializing the rhythm pattern and bass chord pattern, and is used for rhythm control data other than the prelude section.
RMCk, RMCm, etc. are used to instruct rhythm change (change of rhythm pattern and/or bass chord pattern) or rhythm off (stop of automatic rhythm sound generation).

In FIG. 1, when the RAM write control circuit 16 detects a mark code MK ₁ , it outputs a write command signal _M1.
occurs. This write command signal _M1 is supplied to the rhythm type register 18 in FIG. and,
When the rhythm type data RS is sent from the RAM write control circuit 16 as the musical score data DA, the data RS is written into the register 18.

Next, the RAM write control circuit 16 writes the mark code
Detects MK ₂ and generates write command signal M ₂ . This write command signal M ₂ is supplied to the write/read control circuit 20 and puts it into the write mode, so that this circuit 20 supplies a write address signal to the melody pitch RAM 22. Then, when the melody pitch data MEP is sequentially sent out as the musical score data DA from the RAM write control circuit 16, the data MEP is sequentially written into the RAM 22 in accordance with the write address signal from the circuit 20.

Next, the RAM write control circuit 16 writes the mark code
Detects MK ₃ and generates write command signal M ₃ . This write command signal M ₃ is supplied to the write/read control circuit 24 and puts it into the write mode, so that this circuit 24 supplies a write address signal to the melody note length RAM 26. Then, when the melody note length data MEL is sequentially sent out from the RAM write control circuit 16 as the musical score data DA, the data MEL is sequentially written into the RAM 26 in accordance with the write address signal from the circuit 24.

Next, the RAM write control circuit 16 writes the mark code
Detects MK ₄ and generates write command signal M ₄ . This write command signal _M4 is supplied to the write/read control circuit 28 in FIG.
A write address signal is now supplied to the address signal. Then, the musical score data is sent from the RAM write control circuit 16.
When the obbligato pitch data OBP is sequentially sent out as DA, the data OBP is sequentially written into the RAM 30 in accordance with the write address signal from the circuit 28.

Next, the RAM write control circuit 16 writes the mark code
Detects _MK5 and generates write command signal _M5 . This write command signal _M5 is supplied to the write/read control circuit 32 shown in FIG.
A write address signal is now supplied to the address signal. Then, the musical score data is sent from the RAM write control circuit 16.
When the obbligato code length data OBL is sequentially sent out as DA, the data OBL is sequentially written into the RAM 34 in accordance with the write address signal from the circuit 32.

After the data reading/writing process is completed as described above, the start switch 36 shown in FIG. 3 can be turned on to start automatic performance operation and key press instruction operation. FIG. 6 shows an outline of such an operation. When the start switch 36 is turned on, the tempo lamp blinks or the tempo sound is played during the period from the time _ts when the start switch 36 is turned on to _tp , which corresponds to one measure. The tempo setting is done by De. And the point in time
During the period from _tp to _tn, which corresponds to four measures, a prelude of auto bass chords, autorhythm, high-volume obbligato, etc. is performed. Thereafter, during the period from time t _n to end time t _e , a melody-based performance (including interludes) and key press instructions related to the melody are performed. In a performance based on this melody, accompaniment such as auto bass chords, auto rhythm, and low-volume obbligato are performed with appropriate rhythm off or rhythm changes, and during interludes, obbligato is played at high volume.

Next, the operation of the start control section shown in FIG. 3 will be explained with reference to FIG. When the start switch 36 is turned on, the R-S flip-flop 38 is set in response to the on signal, and its output Q="1".
An operating signal OPER consisting of is generated. Also, the on signal from the switch 36 is sent to the differential circuit (DIF) 4.
0 and is converted into a start pulse ΔSTRT.

The operating signal OPER is supplied to the AND gate 42 while resetting the R-S flip-flop 48 and the counter 50 via the inverter 44. Since the output Q = "0" of the flip-flop 48 makes the AND gate 42 conductive via the inverter 52, the AND gate 42 receives the operating signal.
AND gate 5 output signal “1” according to OPER
Supply to 4. Therefore, the AND gate 54 outputs the start pulse ΔSTRT from the OR gate 56.
is sent out and supplied to the tempo lamp 60 via the OR gate 58 as the lamp drive signal TEMP. Therefore, as shown in FIG. 7, the tempo lamp 60 lights up momentarily at the start time _ts in response to the start pulse ΔSTRT.

The counter 62 is reset by the start pulse ΔSTAT from the OR gate 64, and at the same time, the tempo oscillator 65 is also reset by the start pulse ΔSTRT.
It is reset by . After being reset, the counter 62 counts the tempo clock signal TCL from the tempo oscillator 65, and generates a quarter note pulse PP at each timing when the length of a quarter note ends.
Bar pulse MP every time the length of the bar ends
occurs. Quarter note pulse PP is counter 50
while being supplied to AND via OR gate 56
The signal is supplied to the gate 54.

When the counter 50 counts four quarter note pulses PP, it generates a four-count signal _CN4 to reset the flip-flop 48, so that the flip-flop 48 outputs a performance mode signal PLAY consisting of its output Q=“1” as shown in FIG. A differentiating circuit 68 receives this signal PLAY as shown in FIG.
A performance mode pulse ΔPLAY is sent from.

Performance mode signal from flip-flop 48
PLAY is connected to AND gate 4 via inverter 52
2 is rendered non-conductive, the AND gate 54 is turned off in response to the output signal "0" of the AND gate 42 at this time.
becomes non-conductive, and subsequent transmission of quarter note pulses PP is prohibited. i.e. quarter note pulse PP
are sent out through the AND gate 54, and these three quarter note pulses are sent out as a lamp drive signal through the OR gate 58 as shown in FIG.
It is supplied to the tempo ramp 60 as TEMP.

When the counter 50 generates the 4-count signal _CN4 , the AND gate 54 becomes non-conductive as described above, but the AND gate 70 becomes conductive in response to the performance mode signal PLAY. Therefore, the first bar pulse MP generated from the counter 62 in synchronization with the fourth quarter note pulse passes through the AND gate 70,
Furthermore, the lamp drive signal is passed through the OR gate 58.
It is supplied to the tempo ramp 60 as TEMP.
After the counter 62 is once reset by the performance mode pulse ΔPLAY from the OR gate 64, it generates a bar pulse MP for each bar, and these bar pulses MP are sent to the AND gate 70 and the OR gate 70.
It is supplied to the tempo lamp 60 via the gate 58 as a lamp drive signal TEMP.

Therefore, as shown in FIG. 7, the tempo lamp 60 is turned on by the start pulse ΔSTRT, and then turned on in response to each of the three quarter note pulses PP.
From now on, it will light up every time a bar pulse MP is generated.

In addition, as a means of indicating the tempo before starting the performance,
Not only the visual means using the tempo lamp 60 as described above, but also the auditory means using the tempo sound may be used. That is, in the rhythm sound source circuit 72
A specific rhythm sound source is driven according to the output signal of the AND gate 54, and the output signal from this rhythm sound source is
The RO may be supplied to the speaker 76 via the output amplifier 74 shown in FIG. 1, and the speaker 76 may generate a tempo sound such as "knock-knock-knock-knock".

Next, the operations of the obbligato data processing section shown in FIG. 2 and the autorhythm section shown in FIG. 3 will be explained.

When the start pulse ΔSTRT is generated, this pulse is supplied as the first read command signal to the write/read control circuit 28 through the OR gates 80 and 82 in FIG. An address signal is supplied to the obbligato pitch RAM 30. Therefore, the first pitch data 1 in the obbligato pitch data OBP shown in FIG. 5 is read out from the RAM 30 and latched by the latch circuit 84 in response to the start pulse ΔSTRT. Further, since the first pitch data 1 is also supplied to the discrimination circuit 86, the circuit 86 discriminates the data type, generates the pitch data detection signal PC, and supplies it to the AND gate 88.

On the other hand, the start pulse ΔSTRT is OR gate 9
0 and 92 to the write/read control circuit 32 as the first read command signal, the circuit 3
2 supplies the first read address signal to the obbligato code length RAM 34. For this reason, RAM34
The first note length data 1 in the obbligato note length data OBL shown in FIG. 5 is read out from the latch circuit 9.
4 in response to the start pulse ΔSTRT. In addition, since the first note length data 1 is also supplied to the discrimination circuit 96, the circuit 96 discriminates the data type and generates the note length data detection signal LN.
Supplied to AND gate 98.

After this, perform the performance mode signal as described above.
PLAY and performance mode pulses ΔPLAY are generated. Performance mode pulse ΔPLAY is OR gate 10
0 to the AND gate 88 as the read control signal ONEXT.
The output signal of gate 88 becomes "1". This output signal "1" is pitch data 1 from the latch circuit 84.
is latched by latch circuit 102, while being supplied to write/read control circuit 28 as a second read command signal via OR gates 80 and 82. Therefore, the first chord data CHD ₁ in the obbligato pitch data OBP shown in FIG. 5 is read out from the RAM 30. This chord data CHD ₁ is supplied to a discrimination circuit 86 and a latch circuit 104, and when the discrimination circuit 86 generates a chord data detection signal CH, it is latched by the latch circuit 104 in response.

Since the detection signal CH is supplied to the write/read control circuit 28 as the third read command signal via the OR gate 82, the RAM 30 outputs the first volume control data VOL in the obbligato pitch data OBP shown in FIG. ₁ (H) is read out and supplied to the discrimination circuit 86. Therefore, the discrimination circuit 86 generates a high volume data detection signal HI, causing the R-S flip-flop 106 to be set.

The detection signal HI is written through the OR gate 82.
Since it is supplied to the read control circuit 28 as the fourth read command signal, pitch data 2 in the obbligato pitch data OBP shown in FIG. 5 is read out from the RAM 30. This pitch data 2 is supplied to a latch circuit 84 and a discrimination circuit 86, and when the discrimination circuit 86 generates a pitch data detection signal PC, it is latched by the latch circuit 84 in response.

AND gate 8 according to the detection signal PC at this time
The output signal “1” of 8 is connected to the latch circuit 108,
AND gates 110 and 112.
Therefore, latch circuit 108 is connected to latch circuit 104.
Latch chord data CHD ₁ from. Also, R-
S flip-flop 114 is AND gate 110
is set by the output Q="1" of flip-flop 106, which is supplied through the flip-flop 106. For this reason,
The flip-flop 114 sends out the output Q="1" as the volume control signal VC.

On the other hand, the readout control signal ONEXT generated in response to the performance mode pulse ΔPLAY is output to the AND gate 98.
The output signal of the AND gate 98 becomes "1" accordingly. This output signal "1" causes the latch circuit 116 to latch the code length data 1 from the latch circuit 94, and is also supplied to the write/read control circuit 32 via OR gates 90 and 92 as a second read command signal. Ru. Therefore, the first rhythm control data _RMC1 in the obbligato note length data OBL shown in FIG. 5 is read out from the RAM 34. This rhythm control data _RMC1 is supplied to the discrimination circuit 96 and the latch circuit 118, and when the discrimination circuit 96 generates the rhythm control data detection signal RY, it is latched by the latch circuit 118 in response.

Since the detection signal RY is supplied as the third read command signal to the write/read control circuit 32 via the OR gate 92, the note length data 2 in the obbligato note length data OBL of FIG.
is read out. This note length data 2 is determined by the discrimination circuit 96.
and is supplied to the latch circuit 94, and when the discrimination circuit 96 generates the note length data detection signal LN, it is latched by the latch circuit 94 in response.

At this time, the output signal of the AND gate 98 corresponding to the detection signal LN is "1" and is supplied to the latch circuit 120 and the D-flip-flop 122. Therefore, the latch circuit 120 latches the rhythm control data _RMC1 from the latch circuit 118, after which the latch circuit 118 is reset by the output signal of the flip-flop 122.

Rhythm control data from latch circuit 120
Since the RMC is supplied to the rhythm selection control circuit 124 of FIG. 3, the first rhythm control data RMC ₁ is supplied to the circuit 124. Rhythm type data RS is supplied from the register 18 to the rhythm selection control circuit 124.
supplies a selection signal SEL to the pattern memory 126 for selecting a specific rhythm pattern and bass chord pattern according to the data _RMC1 and RS. The pattern memory 126 is a performance mode signal.
It becomes readable when PLAY is received as an enable signal EN, and the rhythm selection control circuit 124
Selection signal SEL from and count output of counter 62
A rhythm pattern signal PS corresponding to a specific rhythm is generated according to CNT, and a bass/chord timing signal BCT matching the rhythm is generated.

The rhythm pattern signal PS is sent to the rhythm sound source circuit 72
The circuit 72 drives an appropriate rhythm sound source within the circuit 72.
is a rhythm sound signal corresponding to the selected rhythm.
RO is sent out. This rhythm sound signal RO is the first
The signal is supplied to the speaker 76 via the output amplifier 74 shown in the figure, and is acoustically converted. Therefore, the autorhythm sound is produced from the speaker 76 immediately after the performance mode signal PLAY becomes "1" (that is, approximately at the same time as time _tp in FIGS. 6 and 7).

The bass/chord timing signal BCT is supplied to the bass/chord forming circuit 128 of FIG. The bass tone/chord forming circuit 128 is the latch circuit 108
A bass tone signal and a chord signal are formed in accordance with the first chord data CHD ₁ from , and are sent out as an output signal AO ₁ at the timing indicated by the bass/chord timing signal BCT (that is, at a timing linked to the rhythm). This output signal AO ₁ is supplied to the speaker 76 via the output amplifier 74 shown in FIG. 1, and is acoustically converted. Therefore, the bass tone and the chord are produced from the speaker 76 in conjunction with the rhythm almost simultaneously with the generation of the autorhythm tone.

Further, the obbligato sound forming circuit 130 sends out an obbligato sound signal AO ₂ in response to the pitch data 1 from the latch circuit 102 . In this case, the output Q=“1” of the flip-flop 114 is the volume control signal.
Since the obbligato sound signal AO 2 is supplied as VC to the obbligato sound forming circuit 130, the volume level of the obbligato sound signal AO ₂ is, for example, lower than the low volume level described below.
It is set 3dB higher. The obbligato sound signal AO ₂ is supplied to the speaker 76 via the output amplifier 74 shown in FIG. 1, and is acoustically converted. Therefore, speaker 7
From 6 onwards, an obbligato sound is played at high volume almost simultaneously with the generation of the autorhythm sound.

As mentioned above, obbligato as a prelude,
As the performance of the auto bass chord and auto rhythm begins, the comparator 132 closes the latch circuit 1.
9-bit note length data 1 from 16 and counter 1
Comparison with the 9-bit count outputs of Q ₂ to Q ₁₀ of No. 34 is started. The counter 134 outputs the performance mode signal PLAY.
When becomes "1", the reset is released via the inverter 136 and the OR gate 138, but after being reset by the playing mode pulse ΔPLAY supplied via the OR gates 100 and 138, the third The tempo clock signal TCL from the tempo oscillator 65 shown in the figure is counted. and,
When the values of the count outputs of Q ₂ to _{Q 10} of the counter 134 match the value of the code length data 1 from the latch circuit 116, the comparator 132 generates a match signal EQ. In this case, since the counter 134 uses the count outputs of Q ₂ to Q ₁₀ for comparison, the count value is four times as large as that when the count outputs of Q ₀ to _{Q 8} are used for comparison.

The match signal EQ causes counter 134 to be reset via OR gates 100 and 138, and counter 1
34 is the tempo clock signal again after this reset.
Count TCL. The match signal EQ is also passed through an OR gate 100 as a read control signal ONEXT.
Supplied to AND gates 88 and 98. Therefore, in the same way as described above, the latch circuit 102 takes in the pitch data 2 from the latch circuit 84, the latch circuit 116 takes in the note length data 2 from the latch circuit 94, and the pitch data 2 is taken in from the RAM 30. Pitch data next to data 2 and note length data next to note length data 2 are respectively read out from the RAM 34 and latched in latch circuits 84 and 94, respectively. As a result, the second obbligato tone is played from the speaker 76, and the comparator 132 compares the note length data 2 with the count outputs of Q ₂ to _{Q 10} of the counter 134 in the same manner as described above. is performed, and a coincidence signal EQ is generated at the timing when the note length reaches the end.

The above-mentioned obbligato data reading operation is repeated in the same way, thereby automatically playing the obbligato and playing the auto bass chord and auto rhythm. High volume data K-1 and note length data K-1 are played at high volume as a prelude, but pitch data K and note length data K are played at a low volume by volume control data VOLk (L) as accompaniment to the melody described later. played at high volume. That is, in FIG. 2, when the discrimination circuit 86 receives the volume control data VOLk(L), it generates a low volume signal LO to reset the flip-flop 106. Output of this flip-flop 106 = “1”
is AND gate 11 when reading pitch data K+1.
2, the volume control signal VC consisting of the output Q of the flip-flop 114 becomes "0" and acts to set the volume of the obbligato low.

Furthermore, when performing obbligato at such a low volume, if the rhythm control data RMCk following the note length data K+1 in FIG. 5 instructs rhythm change or rhythm off, then the rhythm selection control circuit in FIG. 124 is a selection signal to slightly deform the rhythm pattern and/or bass chord pattern during the prelude if the rhythm is changed, or not to generate the rhythm pattern signal PS if the rhythm is off.
SEL is supplied to pattern memory 126. Therefore, the pattern memory 126 generates a rhythm pattern signal PS corresponding to a modified rhythm (fill-in rhythm) pattern if the rhythm is changed and/or a bass/chord timing signal BCT corresponding to a modified bass chord pattern, and if the rhythm is off, Otherwise, the rhythm pattern signal PS is not generated. Therefore,
In the case of a rhythm change, the pattern of the autorhythm and/or auto bass chord is slightly changed, and in the case of a rhythm off, the sounding of the autorhythm is stopped. And such change or suspension state is 1
It continues for a bar, and is canceled in response to the bar pulse MP generated from the counter 62 at the end of one bar, and as a result, the auto bass chord and auto rhythm return to those at the time of performance. Note that in the case of rhythm off, the timing at which the auto bass coat is to be sounded is determined according to the bass chord pattern control signal in the rhythm control data RMCk.

Next, the pitch data L and note length data L in FIG.
From then on, an interlude begins; at this time, the volume of the obbligato is set high by the volume control data VOLl(H). Then, pitch data M-1 and note length data M
After the interlude ends at -1, volume control data is generated from pitch data M and note length data M as before the interlude.
VOLm(L) sets the volume of the obbligato low.

When the rhythm control data RMCm following the note length data M+1 in FIG. 5 instructs rhythm change or rhythm off during such a low-volume obbligado performance after an interlude, the rhythm selection control circuit in FIG. 124 allows rhythm change or rhythm off for one bar as in the case before the interlude described above.

Finally, the end code data is read from the RAM 30 in FIG.
The signal is supplied to the end detection circuit 140 via. When the end detection circuit 140 detects the end chord data, it generates a performance end signal FN, which causes the flip-flop 38 in FIG. 3 to be reset. As a result, as shown in Fig. 7, the operating signal
OPER and performance mode signal PLAY become "0", and the series of automatic performance operations ends.

Next, the operation of the melody data processing section shown in FIG. 1 will be explained.

Since the start pulse ΔSTRT is supplied to the write/read control circuit 20 as the first read command signal via the OR gate 142, the circuit 20 supplies the first read address signal to the melody pitch RAM 22. Therefore, the first rest data 1 in the melody pitch data MEP shown in FIG. 5 is read out from the RAM 22 and latched by the latch circuit 144 in response to the start pulse ΔSTRT. Further, the start pulse ΔSTRT is supplied to the write/read control circuit 24 as the first read command signal via the OR gate 146, so the circuit 24 supplies the first read address signal to the melody code length RAM 26.
Therefore, the first note length data 1 corresponding to the whole note in the melody note length data MEL shown in FIG.

After this, when the performance mode pulse ΔPLAY is generated, this pulse is sent out through the OR gate 150 as the readout control signal MNEXT. This read control signal MNEXT is applied to latch circuits 152 and 1.
54 latches rest data 1 and note length data 1 from latch circuits 144 and 148, respectively, while being supplied to write/read control circuits 20 and 24 via OR gates 142 and 146, respectively. Therefore, in the same manner as last time, the second rest data 2 is read from the RAM 22, and the second note length data 2 corresponding to the whole note is read from the RAM 26, and the latch circuits 144 and 14 respectively read out the second rest data 2 corresponding to the whole note.
It is latched at 8.

The 9-bit code length data 1 from the latch circuit 154 is supplied to the comparator 156 and
It is compared with the 9-bit count output of _Q2 to _Q10 . Here, when the performance mode signal PLAY becomes "1", the counter 158 is reset via the inverter 160 and the OR gate 162, and the performance mode pulse ΔPLAY supplied via the OR gates 150 and 162 After being once reset by , the tempo clock signal TCL from the tempo oscillator 65 shown in FIG. 3 is counted. When the values of the count outputs of Q ₂ to _{Q 10} of the counter 158 match the value of note length data 1 (corresponding to a whole rest) from the latch circuit 154, the comparator 156 generates a match signal EQ.

The match signal EQ causes counter 158 to be reset via OR gates 150 and 162, and counter 1
58 is the tempo clock signal again after this reset.
Count TCL. The match signal EQ is also sent out as the read control signal MNEXT via the OR gate 150, so in the same manner as described above, the latch circuit 152 receives the rest data 2 from the latch circuit 144, and the latch circuit 154 receives the rest data 2. Note length data 2 corresponding to whole notes are taken in from the circuit 148, and rest data 3 is taken in from the RAM 22.
However, code length data 3 is read out from the RAM 26 and latched into latch circuits 144 and 148, respectively. Therefore, at the same time as described above, the comparator 156 outputs the note length data 2 and the counter 158.
A comparison operation with the counting output of Q ₂ to Q ₁₀ is performed,
A match signal EQ is generated at the timing when a note length (whole rest) comes to an end.

The above-described melody data reading operation is repeated in the same manner, and the latch circuit 152 sequentially sends out the melody pitch data MEP middle rest data 3 and subsequent data shown in FIG. Melody note length data in Figure 5
The data starting from MEL curly mark length data 3 is sent out sequentially. Note that note length data 3 and 4 also correspond to whole rests.

The melody sound forming circuit 164 is a latch circuit 152
The melody sound signal MO is electronically formed based on the melody pitch data sequentially sent from the melody pitch data, and this signal MO is supplied to the speaker 76 via the output amplifier 74 and is converted into sound.

As shown in FIG. 5, only rest data is supplied to the melody sound forming circuit 164 in the prelude section.
No melody sound is produced from the speaker 76 during the four measures of the prelude. Then, when the prelude ends, a melody tone is played based on the pitch data 5 and the note length data 5. After this, when the interlude begins, rest data N~
Since it becomes N+3, the melody sound is not played, and the melody sound is played again after the interlude ends. Note that the automatic performance of the melody normally ends before the automatic performance of the obbligato ends, and ends at the latest at time t _e in FIG. 7.

The melody sound forming circuit 164 can also form the melody sound signal MO based on manual performance data from a key switch circuit 168 that includes a number of key switches that are respectively linked to a number of keys on the keyboard 166. Therefore, when a manual player plays on the keyboard 166, a manual player's sound is produced from the speaker 76.

A key press display element 170 such as a light emitting diode is arranged for each key on the keyboard 166, and these elements are connected to a key press display control circuit 172 which receives melody pitch data MEP' from the latch circuit 144. Therefore, the lighting is selectively controlled to indicate which key to press.

In the embodiment described above, obbligato volume control was exemplified as an example of volume control of the second melody, but the present invention can also be applied to volume control of counter melodies and the like. Also, this volume control is used when the first melody, such as a melody, is not being sounded (during prelude or interlude).
Since the second melody, such as obbligato, is made to stand out, volume control data may be included in the note data of the first melody to control the volume of the second melody. Moreover, when volume control data is included in the note data of the first melody, the volume of the first melody can also be controlled based on the volume control data. Furthermore, it is effective to control the tone color and the like in addition to the volume control based on the stored data.

As described above, according to the present invention, since the volume of the first melody or the second melody is automatically changed and controlled, beginners etc. can concentrate on performance practice without having to worry about adjusting the volume. This will improve practice efficiency.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are circuit diagrams showing different circuit parts of an electronic musical instrument according to an embodiment of the present invention, and FIGS. 4 and 5 are circuit diagrams showing the data format used in the electronic musical instrument. The figure shown in Figure 6 is
FIG. 7, an explanatory diagram of the operation of the electronic musical instrument, is a signal waveform diagram for explaining the operation of the electronic musical instrument. 10...Music score, 12...Data recording section, 14...
...Reading device, 22...Melody pitch RAM, 26
...Melody note length RAM, 30...Obligato pitch RAM, 34...Obligato note length RAM,
65... Tempo oscillator, 106, 114... R-S flip-flop for volume control, 130... Obbligato sound forming circuit, 164... Melody sound forming circuit.

Claims (1)

[Scope of Claims] 1. A storage device that stores a first series of note data, volume control data, and a second series of note data; a tempo oscillator that generates a tempo clock signal; a reading circuit that reads the first and second series of note data in parallel and sequentially from the storage device; and a first musical tone that generates a first type of musical tone based on the first series of note data from the storage device. generating means; second musical tone generating means for generating a second type of musical tone based on the second series of note data from the storage device; An automatic performance device comprising a control circuit for controlling the volume of a second type of musical tone. 2. In the automatic performance device according to claim 1, the first series of note data and the second series of note data are a first melody and a second series, respectively.
2. An automatic performance device, which corresponds to a melody, and wherein the volume control data is adapted to increase the volume of the second type of musical tone during a pause period of the first melody. 3 A keyboard device that generates a first series of note data based on key press operations, and a second keyboard device that includes volume control data.
a storage device that stores a series of note data; a tempo oscillator that generates a tempo clock signal; a readout circuit that sequentially reads out the second series of note data from the storage device based on the tempo clock signal; a first musical tone generating means that generates a first type of musical tone based on a first series of musical note data; and a second musical tone generating means that generates a second type of musical tone based on a second series of musical note data from the storage device. 1. An automatic performance device comprising: musical tone generating means; and a control circuit that controls the volume of the first type or second type of musical tone based on volume control data from the storage device. 4. In the automatic performance device according to claim 3, the volume control data is configured to increase the volume of the second melody during a pause period of the first melody, and the second series of note data is An automatic performance device that corresponds to the second melody. 5 a storage device that stores a first series of note data, volume control data, and a second series of note data; a tempo oscillator that generates a tempo clock signal; a reading circuit for reading out two series of note data in parallel and sequentially; a key press instruction means for instructing a key to be pressed on a keyboard based on the first series of note data from the storage device; automatic performance characterized by comprising: a musical tone generating means for generating a musical tone based on the second series of note data; and a control circuit for controlling the volume of the musical tone based on the volume control data from the storage device. Device. 6. In the automatic performance device according to claim 5, the first series of note data and the second series of note data are a first melody and a second series, respectively.
1. An automatic performance device, which corresponds to a melody, and wherein the volume control data is adapted to increase the volume of the musical tone during a pause period of the first melody.