JPH0428115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic performance device suitable for performance practice by beginners and the like, which allows the player to set a tempo for a certain period of time before starting the automatic performance.

Some automatic performance devices that have been proposed in the past read musical score data from a memory and automatically generate musical tones when a start switch is turned on. However, for such devices,
Since automatic performance starts almost simultaneously with turning on the start switch, it is difficult to synchronize the timing between automatic performance and manual performance, and it is often difficult for beginners in particular to start playing smoothly.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an automatic performance device in which the timing at the start of a performance can be easily adjusted.

The automatic performance device according to the present invention includes (a) a storage means for storing musical score data, (b) a means for generating a tempo clock signal, (c) a start operation means for performing a start operation, and (d) a start operation means for performing a start operation. (e) counting reading means for counting the tempo clock signal for a predetermined period of time in response to a start operation on the operating means and sequentially reading out the musical score data from the storage means based on the tempo clock signal; (e) the storage means; (f) tempo instructing means for instructing the tempo by emitting light based on the tempo clock signal during the predetermined time.

According to the configuration of the present invention, when a start operation is performed, the tempo is instructed by light emission for a predetermined period of time before the automatic performance starts. Therefore, by checking the instructed tempo and taking the time signature, it is possible to synchronize the timing with the automatic performance and move on to manual performance.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

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. As for the processing section, FIG. 3 mainly shows a start/stop control section and an autorhythm section, respectively.

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,
To identify MEP, MEL, OBP, OBL,
It is a mark code.

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 rest or a chord corresponding to the note length.

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 , CHD _k , CHD _l, etc., and volume control data VOL ₁ (H), VOL _k for obbligato volume control
(L), VOL _l (H), VOL _n (L), etc. The chord data consists of a root note name and a code indicating the chord type (for example, major, minor, seventh, etc.), and if it is a rest, all bits are set to "0".
Regarding volume control, as an example, volume control data VOL ₁ (H) and
The volume of the obbligato is raised by VOL _l (H), and the volume of the obbligato is lowered by volume control data VOL _k (L) and VOL _n (L) in other parts. 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 melody note length data corresponding to the note progression of the obbligato portion, and also includes rhythm control data RMC ₁ , RMC _k , RMC _n , 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.
RMC _k , RMC _n , 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. become. Then, the musical score data DA is sent from the RAM write control circuit 16.
When the obbligato code length data OBL is sent out sequentially, 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 as appropriate with rhythm off or rhythm changes, and obbligato is played at high volume during interludes.

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, from the AND gate 54
A start pulse ΔSTRT is sent from the OR gate 56 and supplied to the tempo lamp 60 via the OR gate 58 as a 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 ΔSTRT 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 and sets the flip-flop 48, so that the flip-flop 48 outputs a performance mode signal PLAY consisting of an output Q=“1” as shown in FIG. The playing mode pulse ΔPLAY is generated from the differentiating circuit 68 which receives this signal PLAY as an input.

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 lamp 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, then the
It lights up in response to each quarter note pulse PP, and thereafter lights 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. Since the pitch data detection signal PC is also supplied to the AND gate 88, the circuit 86 determines the data type, generates a 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, it is latched 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, as mentioned above, play mode signal PLAY
and a play mode pulse ΔPLAY is generated. The performance mode pulse ΔPLAY is sent to the AND gate 8 as the readout control signal ONEXT via the OR gate 100.
Accordingly, the output signal of AND gate 88 becomes "1". This output signal "1" causes pitch data 1 from the latch circuit 84 to be latched in the latch circuit 102, and is also supplied to the write/read control circuit 28 as a second read command signal via OR gates 80 and 82. Ru. 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 the chord data CHD ₁ from. Also, R
-S flip-flop 114 is AND gate 11
0 is set by the output of flip-flop 106, Q="1", which is supplied via 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.
Since the output signal is also supplied 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 as a second read command signal via OR gates 90 and 92. 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.
generates the code length data detection signal LN, which is latched by the latch circuit 94 in response.

At this time, the output signal "1" of the AND gate 98 corresponding to the detection signal LN is output from the latch circuit 120 and D
- supplied to 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 according to the first chord data CHD ₁ from
(timing linked to the rhythm) is sent as output signal AO ₁ . 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 it is supplied as VC to the obbligator and the sound forming circuit 130, the volume level of the obbligato sound signal AO ₂ is, for example, lower than that of 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 76
Then, 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 starts, the comparator 132 closes the latch circuit 11.
9-bit note length data 1 from 6 and counter 13
Comparison with the 9-bit count output of Q ₂ to Q ₁₀ of No. 4 is started. When the performance mode signal PLAY becomes "1", the counter 134 is reset via the inverter 136 and the OR gate 138, and is reset by the performance mode pulse ΔPLAY supplied via the OR gates 100 and 138. Once reset, the tempo clock signal TCL from the tempo oscillator 65 in FIG. 3 is counted. When the count output values 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 sound is produced from the speaker 76, and the comparator 1
32, the code length data 2 is compared with the count outputs of _Q2 to _Q10 of the counter 134 in the same way as described above, and a match signal EQ is generated at the timing when the code length reaches the end.

Then, the above-described obbligato data reading operation is repeated in the same way, thereby performing automatic performance of obbligato and performance of auto bass chord and auto rhythm.

Here, the obbligato is played at a high volume as a prelude up to pitch data K-1 and note length data K-1 in FIG. The music is played at a low volume according to the volume control data VOL _k (L).
That is, in FIG. 2, when the discrimination circuit 86 receives the volume control data VOL _k (L), it generates a low volume signal LO to reset the flip-flop 106. Since the output Q of the flip-flop 106 = "1" resets the flip-flop 114 via the AND gate 112 when reading the pitch data K+1, the volume control signal VC consisting of the output Q of the flip-flop 114 becomes "0".
It works to lower the volume of the obbligato.

Furthermore, when performing an obbligato at such a low volume, if the rhythm control data RMC _k following the note length data K+1 in FIG. 5 instructs rhythm conversion or rhythm off, then the rhythm selection control in FIG. The circuit 124 generates a selection signal so as 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, if the rhythm is changed, the pattern memory 126 generates a rhythm pattern signal corresponding to a modified rhythm (fill-in rhythm) pattern and/or a bass/chord timing signal BCT corresponding to a modified bass chord pattern; Rhythm pattern signal PS is not generated. Therefore, when the rhythm is changed, the autorhythm and/or autobass chord pattern is slightly changed, and when the rhythm is off, the autorhythm is stopped. Such a change or stop state continues for one 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 are changed during the prelude. Back to the stuff. Note that in the case of rhythm off, the chord timing at which the auto bass chord is sounded is determined according to the bass chord pattern control signal in the rhythm control data RMC _k .

Next, the pitch data L and note length data L in FIG.
An interlude begins, and at this time the volume of the obbligato is set high by the volume control data VOL _l (H). After the interlude ends with pitch data M-1 and note length data M-1, volume control data is generated from pitch data M and note length data M in the same way as before the interlude.
The volume of the obbligato is set low by VOL _n (L).

When performing such a low-volume obbligato after an interlude, if the rhythm control data RMC _n following the note length data M+1 in FIG. 5 instructs rhythm change or rhythm off, the rhythm selection control circuit in FIG. 124 is 1 as in the case before the interlude mentioned above.
Allows rhythm changes or rhythm off between bars.

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 of 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 rest 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 way as last time, the second rest data 2 is read from the RAM 22, and the second note length data 2 corresponding to a whole rest 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 rest.
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 to TCL. The coincidence signal EQ is also sent as the read control signal MNEXT via the OR gate 150, so that the latch circuit 152 receives the rest data 2 from the latch circuit 144 and the latch circuit 154 receives the rest data 2, in the same manner as described above. Note length data 2 corresponding to whole rests are fetched from the circuit 148, and rest data 3 is fetched from the RAM 22.
However, code length data 3 is read out from RAM 26 and latched in latch circuits 144 and 148, respectively. Therefore, the comparator 156 compares the note length data 2 and the counter 158 in the same manner as described above.
A comparison operation with the count output of Q ₂ to _{Q 10} is performed, and a match signal is generated at the timing when the note length (whole rest) reaches the end.
EQ is generated.

Then, the melody data reading operation as described above is repeated in the same manner, and the latch circuit 15
From the latch circuit 154, the melody pitch data MEP middle rest data 3 and subsequent data shown in FIG. Sent out. 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~N
Since it becomes +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 the 7th automatic performance ends at the latest.
The process ends at point t _e in the figure.

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 performance is performed on the keyboard 166, a manual performance 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.

As described above, according to the present invention, the tempo is instructed by emitting light for a predetermined period of time before the start of automatic performance, making it easy to synchronize the timing between automatic performance and manual performance, especially for beginners. This has the effect of allowing you to grasp the tempo and move on to the performance. Furthermore, since the tempo is indicated by light emission, it is not jarring like the tempo indicated by sound, and it has the advantage of being smart, especially when playing in front of people, because you can smoothly move on to the performance without any pre-beats.

[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, 36 ... Start switch, 50, 62 ... Counter, 60 ... Tempo lamp, 65 ... Tempo oscillator, 164 ... Melody sound forming circuit, 166 ... Keyboard, 170 ... Key pressed Display element, 172...Key press display control circuit.

Claims (1)

[Scope of Claims] 1 (a) storage means for storing musical score data; (b) means for generating a tempo clock signal; (c) start operation means for performing a start operation; and (d) this start operation. (e) counting reading means for counting the tempo clock signal for a predetermined period of time in response to a start operation at the means, and sequentially reading out the musical score data from the storage means based on the tempo clock signal; An automatic performance device comprising: (f) a musical tone generating means for generating a musical tone signal based on musical score data to be read; and (f) a tempo indicating means for indicating a tempo by emitting light based on the tempo clock signal during the predetermined time.