JPS6012639B2 - electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic musical instrument that automatically plays grace notes having a predetermined pitch relative to the pitch of a stamped key.

In order to actually play grace notes, a performer is required to have a considerable playing technique.

An object of the present invention is to provide an electronic musical instrument that can automatically add grace notes, and to enable even beginners to easily play grace notes. An electronic musical instrument to which this invention is applied generates a code signal (key code) corresponding to a pressed key, reads out a numerical value proportional to the frequency of the pressed key from memory using this code signal as an address, and sequentially reads this numerical value. For example, Japanese Patent Application No. 48-41964 (Sho 49-13023) advances the address for reading out the tone waveform memory by accumulating
No.)・Name of the invention “electronic musical instrument” or patent application 1984
This is an electronic musical instrument of the type described in the specification of No. 9525, the title of the invention "Electronic Musical Instrument." In this type of electronic musical instrument, when a key is pressed on the keyboard, in addition to the above-mentioned key code, an attack start signal (or key-on signal) indicating that the key has been pressed and a key-on signal indicating that the key has been released is transmitted. A decay start signal (or key-off signal) is generated and used to control the amplitude envelope of musical tones. Grace notes change pitch by at least a semitone or more, so
According to this invention, the pitch of another key is specified by modulating the content of the key code corresponding to the pressed key for one fixed time, thereby realizing a grace tone.

This modulation is realized, for example, by adding or subtracting a desired binary value to or from the binary key code representing the pressed key. By performing the modulation only for a certain period of time after the attack start signal is generated, a grace note of the prefix can be obtained. Further, by executing the modulation for a certain period of time after the decay start signal is generated, a grace note of the after-beat note can be obtained. The invention will now be described in detail with reference to the embodiments of the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, which is configured to realize a grace note of a pre-clap.

Briefly, when a key is pressed on the keyboard 1, a pressed key detection circuit 2 detects which key is pressed, and a sound generation assignment circuit 3 sends out a key code KC representing the pressed key. This key code KC represents the key of the main note for the grace note. If this main note is shown in a musical score, it is, for example, the C3 note in FIG. That is, if the C3 note is the main note, the key for the C3 note is pressed on the keyboard 1, and a key code KC representing the C3 note is generated. On the other hand, when the key is pressed, the attack start signal AS is applied to the counter 4 that sets the length of the grace note, causing the counter 4 to operate. In the case of FIG. 2, the grace note of the main note C3 is E3, which is a third higher. The length of this grace note is set by the counter 4, but in general, strict precision is not required for the length of the grace note. When the counter 4 is operating for a certain period of time corresponding to the grace note length, a value G corresponding to the interval between the main note and the grace note is supplied to the adder 5, and the key code from the pronunciation assignment circuit 3 is supplied to the adder 5. Added to the binary value of KC. As a result, the contents of the key code KC are modulated, and the key code KC* specifying the ornament key is added to the frequency information storage device 6. The pitch of the grace note can be arbitrarily selected and set using the selection switch 7. After the predetermined time period has elapsed, the gate 8 is closed and the value G is no longer supplied to the adder 5, so that the adder 5 outputs the key code KC from the sound generation allocation circuit 3 as is. The frequency information storage device 6 reads out a numerical value F that is proportional to the frequency of the key specified by the modulated key code KC* or the original key code KC, and based on this numerical value F, the frequency information memory 9 and the musical waveform memory 10' are stored. Here, musical tones of the pitches of the grace notes and the pitches of the main notes are successively produced. A pressed key detection circuit 2 is disposed on the keyboard 1 and detects the ON or OFF operation of the key switch of each key, and outputs a signal identifying the pressed key.

The sound generation assignment circuit 3 receives a signal identifying the pressed key from the pressed key detection circuit 2, and assigns the sound of the key represented by this signal to one of the channels corresponding to the maximum number of simultaneous sounds (for example, 12 notes). Assign. The sound generation assignment circuit 3 has a memory location corresponding to each channel, stores a key code KC representing a certain key in the memory location corresponding to the channel to which the sound of a certain key is assigned, and stores the key code KC stored in each channel. KC is sequentially output in a time-division manner. Therefore, when multiple keys are pressed simultaneously on the keyboard 1, each pressed key is assigned to a separate channel, and a key code KC representing the assigned key is stored in the memory location corresponding to each channel. be done. Each storage location can be formed by a rotating shift register. For example, if the key code KC that specifies each key on keyboard 1 is composed of 8-bit data as shown in Table 1, and the total number of channels is 12, then 12 words (1 word = 8 bits) It is recommended to use a shift register. 1st
In Table 1, the key names indicate the individual keys on each keyboard, and the upper and lower keyboards each have 61 keys from C, to C6, and the number of keys on the pedal keyboard is the same. less than.

Each keyboard is divided into blocks for each mirror, and block codes B2, B, from 00 to 11 are assigned to each block in order from the lowest tonal range. 1 mirror building in 1 block 'koha00
Note codes N4 to N of 16 weights from 00 to 1111 are assigned in order from the bass side.

As a result, in the key code KC, the binary value 1 corresponds to the pitch of a semitone. The note code is located at the lower 4 bits of the key code KC, and the flock code is located at the 5th and 6th bits of the key code KC.
Also, the code K2, K, representing the keyboard is the key code KC.
The contents of K2, K are "0r" for the upper keyboard, "1b" for the lower keyboard, and "1b" for the pedal keyboard.
11". In this embodiment, in order to be able to produce a plurality of sounds at the same time, various counters, logic circuits, storage devices, etc. are dynamically configured to be shared in a time-sharing manner. The time relationships of the clock pulses that regulate the operation of the device are extremely important.

FIG. 3a is a graph showing the main clock pulse, which controls the time division operation of each channel, and has a pulse interval of, for example, 1 fs. Since the number of channels is 12, time slots of lrs width sequentially separated by main clock pulses ◇, correspond to channels 1 to 12 in sequence. As shown in FIG. 3b, each time slot is referred to as a first channel time to a twelfth channel time in order.
Each channel time occurs cyclically. Therefore, the key code K representing the key to which the pronunciation is assigned by the pronunciation assignment circuit 3 is
C (that is, the key code stored in the shift register) is sequentially and dividedly output in accordance with the time of the assigned channel. For example, the G3 note of the pedal keyboard is assigned to the first channel, and the C note of the upper keyboard is assigned to the second channel.
Suppose that 3 notes are assigned, the D2 note on the upper keyboard is assigned to the 3rd channel, the C5 note on the lower keyboard is assigned to the 4th channel, and no sound is assigned to the 5th to 12th channels. The contents of the key code KC output from the allocation circuit 3 in a time-division manner in synchronization with each channel time are as shown in FIG. 3c. 5th channel to 1st
The outputs of the two channels are all "0". Furthermore, the sound generation assignment circuit 3 outputs an attack start signal (or key-on signal) AS in a time-divisional manner in synchronization with the time of each channel, indicating that the sound should be generated in the channel to which the pressed key is assigned the sound generation.

Furthermore, the keys assigned to each channel are released,
As a result, a decay start signal (or key-off signal) DS indicating that the sound generation should be attenuated is output in a time-divisional manner in synchronization with the time of each channel. These signals A
S and DS are used for amplitude envelope control (sound production control) of musical tones. Furthermore, the sound generation allocation circuit 3 receives a decay end signal DF indicating that the sound generation in that channel has ended (decay has ended) from the envelope generation circuit 11 described later, and based on this signal DF, various memories related to the channel are stored. , and outputs a clear signal CC that completely cancels the sound assignment. In the example in Figure 3c, the keys assigned to the first and second channels are currently being pressed, and the keys assigned to the third and fourth channels have been released and their sound is attenuated. , in the fourth channel, the sound generation ends at time slot t, and a decay end signal DF is generated, and at time slot t, which is delayed by 12 channel times.
Assuming that the quasi signal CC is output at the time of 2, the 3rd
Signals AS, DS, DF, and CC are generated as shown in FIGS. d to g. In addition, at time slot t2, clear signal C
Since C is output, the attack start signal AS and decay start signal DS of the fourth channel are erased. At this time, the key code KC of the fourth channel time in FIG. 3c is also erased, but is depicted as it is for convenience of explanation. Various signals KC, AS, D output from the sound generation allocation circuit 3
As shown in FIG. 3, which channel S and CC belong to can be distinguished by the channel time.

Detailed circuit examples of the above-mentioned sound generation assignment circuit 3 or key press detection circuit 2 are not particularly shown.

These circuits 2 and 3 are described, for example, in Japanese Patent Application No. 47-125513 (Tsubaki Seki 49-1842), which has already been published.
No. 15) - Title of the invention: "Key data signal generator"
No. 16) - The device disclosed in the specification of the invention title "Key Asina" can be used. Of course, the key press detection circuit 2 and the sound generation assignment circuit 3 may be configured by devices other than those disclosed in the specification of the above application, but these will not be described in detail here. Since the key code KC sent from the sound generation allocation circuit 3 represents a pressed key, this key code KC receives numerical information F specific to the musical tone frequency of the key corresponding to the key code KC from the frequency information storage device 6. Used as an addressing signal for reading.

The frequency information storage device 6 is constituted by, for example, a read-only memory in which frequency information F (constant) corresponding to the key code KC of each key is stored in advance, and when a certain key code KC is added, that code is stored in advance. The frequency information F stored at the address specified by is read out.

Since the frequency counter 9 regularly accumulates this frequency information F and samples the amplitude of the musical sound waveform at regular intervals, the frequency information F is a digital value proportional to the musical tone frequency of the key. This is, for example, a 15-bit binary value signal as disclosed in the specification of Tokushu No. 48-41964 (Tokukan Sho 49-1130213) entitled "Electronic Musical Instrument." This frequency information F
is a numerical value including values below the decimal point when expressed as an IG Hayabusa number, the most significant bit of the 15 bits corresponds to an integer, and the lower 14 bits represent the value below the decimal point. The value of the frequency information F is uniquely determined when the value of the musical tone frequency is specified at a certain sampling rate.

For example, the value qF (where q = 1, 2, 3, ...) obtained by successively accumulating frequency information F by the frequency counter 9 is 1G.
When the number of ships reaches 64, the sampling of one musical sound waveform is completed, and the total channel time is one cycle.
If this accumulation is performed every 2rs, F=12×
The value of frequency information F is determined by the formula M×〆×10-6. It is the frequency of musical tones. It is sufficient if the value of F is stored in the storage device 6 in correspondence with the frequency at which it should be obtained. For example, C. The musical frequency corresponding to the sound is 65.406
Since it is Hz, the value of F is 0.052325. The value of F is similarly determined for other sounds. The frequency counter 9 is a counter that accumulates the frequency information F of each channel at a constant sampling rate (at a rate of 12 seconds for each channel time). The phase of the musical sound waveform to be read out is advanced to 1s).

Overflow occurs when cumulative value qF reaches 64 in decimal
and returns to 0, completing reading of one waveform. Since the IG Hayabusa number of 64 can be expressed as a 6-bit binary signal, the frequency information F where the 15th bit is the first integer is accumulated and the counting result is held until the accumulated value qF reaches 64. In order to do this, a counter is constructed with a word length of 20 bits (the lower 14 bits are the decimal part and the upper 6 bits are the integer part).
It is convenient for the frequency counter 9 to be configured with a 20-bit adder and a 20-bit shift register in order to time-divisionally share the frequency counter 9 with each channel. The musical tone waveform memory 10 divides the musical tone waveform into a plurality of (for example, 64) sample points, and sequentially stores the amplitude value of each sample point in each address.

The value qF, which is the output of the frequency counter 9, becomes an input that specifies the address to be read from the memory 0. Since the number of addresses in memory 0 is 64, the upper 6 bits of data corresponding to the integer value of the value qF are added to the memory 10 as address input. Sound assignment circuit 3
As mentioned above, the adder 5 provided between the key code KC and the frequency information storage device 6 is a circuit for adding or subtracting the value G corresponding to the pitch to the key code KC. Since the value of the key code KC increases as the value increases, the key code KC* modulated when the value G is added specifies an ornament tone higher than the main note.

Furthermore, when the value G is subtracted, the modulation key code KC* specifies an ornament tone lower than the main note. The selection of whether the adder 5 is to perform addition or subtraction operation can be made by switching the selection switch 12. When the switch 12 is connected to the o position, signal 1 is applied to the adder 5, instructing an addition operation. When switch 12 is connected to the U position, signal 0 is applied to adder 5, indicating a subtraction operation. The counter 4 includes a 6-bit adder 13 and a 1 base word x 6-bit shift register 14, and is capable of time-division sharing for 12 channels.

Hereinafter, only one channel, for example the second channel, will be explained. FIG. 4 shows only the time of the second channel extracted. As shown in FIG. 2, consider the case where the main note is C3 and a grace note E3, which is a third above the note, is added. When the C3 tone key is pressed on the keyboard 1 and assigned to the second channel by the sound generation assignment circuit 3, an attack start signal AS (FIG. 4b) is generated at the second channel time. This signal AS enables the band circuit 15, and transmits the clock pulse CP from the clock oscillation source 16 to the adder 13.
Add to. Adder 13 adds this clock pulse CP and the output of the final stage of shift register 4,
Send to the first stage of 4. The addition result is input from the register 14 to the adder 13 every 12 channel times, is circulated and held, and is added by 1 every time a clock pulse CP is added. Therefore, the clock pulses CP are integrated and counted by the counter 4. All bits output from register 14 are applied to NAND circuit 17. Since the NAND circuit 17 outputs signal 1 if there is even one 0 bit in the count output of the shift register 14, the signal 1 from the NAND circuit 17 is gated until the count output of the corresponding channel of the shift register 4 reaches the maximum value. 8 and conducts the gate 8.
When the count output of register 14 reaches the maximum value, all bits become “
1", the output of the NAND circuit 17 becomes "0" and the AND circuit 15 becomes inoperable. Therefore, the clock pulse CP is blocked, and the corresponding channel of the register 4 holds the maximum value. At the same time, the output of the AND circuit 18 C (4th
Figure c) becomes "1", indicating the end of the grace note. Therefore, the gate 8 is conductive for a certain period of time Tg from when the attack start signal AS is generated until the grace note end signal C is generated, and after Tg has elapsed, the output of the NAND circuit 17 is "0". Gate 8 becomes non-conductive. A binary value G corresponding to the pitch of the grace note only during a certain time period mg that gate 8 is suitable for.
is supplied to adder 5.

The value G is read out from a read-only memory 19 that stores in advance a plurality of values corresponding to various pitches, and is supplied to the gate 8. This read-only memory 19 reads out the value G according to the setting position of the pitch selection switch 7. When switch 7 is set to position 7a, a value G corresponding to, for example, a semitone interval is read out. This is 1 in Table 1.
When set to position 7b, a value G corresponding to a 3rd interval is read out, and when set to position 7c, a value G corresponding to a 5th interval is read out. For example, the value of 3 degrees is IG Hayabusa's 4, and 5
The degree value is 7 for a 1G ship. Therefore, in the case of the third interval shown in FIG. 2, the switch 7 is set to the position 7b, and the interval value G having a value of 4 ("10 pi" in binary) is supplied to the adder 5.
In the case of Fig. 2, the main note is C3, so the content of the key code KC added to the adder 5 is "011000" (excluding keyboard codes K2, K,), and the value G is "10".
0'1 is added (switch 12 is placed in D position), "
The modulation key code KC* having the content 01110 is added to the frequency information storage device 6 for a certain period of time Tg.

As is clear from Table 1, this modulation key code KC* represents the E3 note, so the frequency information F of the E3 note is read out, and the musical sound having the pitch of the E3 note is read out from the musical waveform memory 10. The waveform is read out. In this way, a musical tone is generated at the pitch of the grace note E3 for a certain period of time Tg from the beginning of the divine key.

When the time Tg has elapsed, the value G becomes 0, so the key code KC is directly added to the storage device 6, and a musical tone is generated at the pitch of the main note C3. The duration time Tg of the grace note can be arbitrarily set by variably controlling the frequency of the oscillation clock pulse CP of the clock oscillation source 16. register 14 is 6
Since it is a bit, if the period of clock CP is 7,
Tq = zo ding (seconds). Incidentally, the attack start signal AS is also applied to the envelope generation circuit 11, and the clock selection circuit 20 selects the attack clock pulse ACP to drive the envelope counter 21.

Based on the output of the envelope counter 21, the envelope amplitude EV of the attack portion is read out from the envelope memory 22, thereby controlling the amplitude of the musical tone waveform output from the musical tone waveform memory 10. Therefore, as shown in FIG. 4a, an attack envelope is added to the grace note E3. When the attack ends, an attack end signal AF is generated from the counter 21, and the clock selection circuit 20 blocks the attack clock pulse ACP. As a result, the amplitude of the musical sound waveform is maintained at a constant sustain level. Now,
When the ornamentation sound generation time Tg ends, the AND circuit 18 generates the ornamentation end signal C. This signal C is delayed by 12 channel times in a 12-bit shift register 23, inverted by an inverter 24, and applied to an AND circuit 25, as well as directly to the AND circuit 25. As a result, the signal C is substantially differentiated, and the output C' of the AND circuit 25 becomes "1" as shown in FIG.
becomes the reset input C'' (Fig. 4 e), and the counter 21
Reset the corresponding channel. Therefore, as shown in FIG. 4a, the envelope amplitude of grace note E3 becomes 0. .
At this time, the attack end signal AF (Fig. 4 f) disappears,
The attack clock pulse ACP is selected again by the attack start signal AS and added to the counter 21. As a result, the envelope amplitude of the attack portion is read from the envelope memory 22, and as shown in FIG. 4a, the attack clock pulse ACP is added to the counter 21. An attack characteristic is applied. When the key is released, a decay start signal DS (Fig. 4g) is generated, and the envelope counter 21 generates a decay clock pulse DC.
P is counted, the envelope of the decay part is read out from the memory 22, and the main tone C3 is attenuated as shown in FIG. 4a. When the decay ends, the counter 21 generates a decay end signal DF (FIG. 4h), and the sound generation allocation circuit 3 generates a clear signal CC (FIG. 4i). This clear signal CC is inverted by the inverter 27 of the grace note length setting counter 4, disabling the AND gate 28, and resetting the maximum value held in the corresponding channel of the counter 4. As a result, the output C of the AND circuit 18 is “
0'' (FIG. 4c). Also, the clear signal CC passes through the OR circuit 26 and is applied to the reset input 〇' of the envelope counter 21, resetting the counter 21. The envelopes of the grace note E3 and the main note C3 as shown in Figure a are controlled.This is the case when playing the grace note shown in Figure 2a.
As shown in Figure b, if the grace note E3 and the main note (C3) are connected by a slur, instead of attacking the grace note and the main note separately as shown above, use the slur as shown in Figure 4 j. Attach an attack to the grace note E3 that is first sounded, and change only the pitch to the main note C3 while sustaining it.In this case, the circuits 23 and 24 reset the envelope counter 21 by the grace note end signal C. , 26 are unnecessary. Note that the musical tone signal output from the musical waveform memory 10 is applied to an appropriate circuit 29 for controlling the timbre, volume, etc., and after controlling the timbre, volume, etc.
It is pronounced after

In the embodiment described above, the analog envelope amplitude EV is directly added to each tone waveform memory 10, and the amplitude of the tone waveform read from the memory 10 is directly controlled. This is a patent application filed in 1972 as Ichiraku sound waveform memory 10.
No. 106945 (Japanese Unexamined Patent Publication No. 49-66121), the name of the invention is "Semiconductor waveform storage device", when a memory having the configuration described in the specification is used, and the musical waveform sample points are output as analog voltages. The power supply voltage of the amplitude value is varied according to the envelope waveform EV.
Therefore, if another read-only memory or the like is used as the memory 10, a separate weighting circuit (not shown) may be provided to control the amplitude of the musical sound waveform in accordance with the envelope waveform EV. FIG. 5 shows the main parts of another embodiment of the present invention configured to realize the ornamentation of the after-beat note, and the same reference numerals as in FIG. 1 indicate the same devices.

In the case of a post-strike note, when the key of the main note (for example, G3 note) shown in Figure 6 is pressed, the key of the main note 0 is pressed as shown in Figure 7a.
Musical sounds are generated by the sound of 3. In other words, the count value of the counter 4 is 0, and the output of the OR circuit 31 is "0", so the gate 8 is blocked and the pitch value G of the grace note is blocked. This is because the information is added to the information storage device 6. When the key is released, the information shown in FIG.
As shown in FIG. 2, a decay start signal DS is generated, enabling the AND circuit 32 and applying a clock pulse CP to the counter 4. When the counter 4 starts counting, any bit of the count output becomes "1", so the output of the OR circuit 31 becomes "1", which makes the gate 8 conductive and sets the pitch value set by the switch 7 (Fig. 1). G is supplied to the adder 5. 6th
In the case shown, the grace note E3 is pitched below the main note, so the switch 12 (Figure 1) is set to the U position, the adder 5 is in the subtraction mode, and the value G is subtracted from the key code KC. Obtain code KC* (KC-G). Since the output C (FIG. 7c) of the AND circuit 18 is "0", the AND circuit 3
3 is inactive, and the decay start signal DS is not applied to the envelope generating circuit 11. Therefore, the sustain level is maintained, and only the pitch changes to grace note E3 while maintaining the amplitude as shown in FIG. 7a. When the count value of the counter 4 reaches the maximum value, all the inputs of the AND circuit 18 become "1", so the output C of the circuit 18 becomes "1", and the inverter 34
The AND circuit 32 is disabled and the count value of the counter 4 is held, and the AND circuit 33 is enabled and the decay start signal DS is applied to the envelope generating circuit 11.

Therefore, the grace note E3 is attenuated. When the decay ends, a decay end signal DF is generated, and a clear signal CC (Fig. 7d) is sent to the counter 4 and the envelope counter 21 (the first
(Figure). This blocks gate 8. The duration time Tg (Fig. 7) of the grace note, which is the afterbeat note, is determined by the clock pulse CP and the decay clock pulse DC.
It is set appropriately by P. FIG. 8 shows the back of another embodiment of the present invention configured to realize a grace note called a trill, and the same reference numerals as in FIG. 1 indicate the same devices.

Trills are represented in music scores using the notation shown in Figure 9a,
As shown in FIG. 9b, the main note (for example, D4 note) and ornamental note (for example, E4 note) are played repeatedly. Main note D
When key 4 is pressed, attack start signal AS enables band circuit 35 and clock pulse CP is applied to counter 4'. Out of the count outputs of the counter 4, only one signal of a desired bit Bx is taken out and applied to the gate 8. For example, if bit Bx is the third bit, "If the period of clock pulse CP is 1, signal 1 will repeatedly appear on bit Bx with a period of T&=7 (seconds). Gate 8 will repeatedly shut off and conduct with period ng2. , the original key code KC and the modulated key code KC* are alternately repeated and added to the frequency information storage device 6. In the case of FIG. 9, the interval between the main note ○4 and the grace note E4 is 2 degrees, so The switch 7 (Fig. 1) is pre-provided with a whisker point for the second.Thus, the main note D4 and grace note E4 are repeatedly generated as shown in Fig. 10.When the key of the main note D4 is released, Decay start signal DS
is applied to the reset input of the counter 4 via the OR circuit 36 to reset the counter 4. Further, the band circuit 35 is made inoperable via the inverter 37. As a result, the gate 8 is shut off, the musical tone is attenuated at the pitch of the main note D4, and the sound generation ends. In addition, in this case, the counter is 1 instead of 4.
A bit flip-flop can be used. In the case of a trill as well, the repetition duration T& of the grace note E4 can be freely set by changing the frequency of the clock pulse CP. As explained above, according to the present invention, it is extremely easy to play grace notes.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of a grace note for pre-clap realized by the circuit shown in FIG. 1, and FIG. 3 is a pronunciation assignment circuit shown in FIG. 1. FIG. 4 is a timing chart explaining the operation of the main part of FIG. 1, FIG. 5 is a block diagram showing the main part of another embodiment of the present invention, and FIG. FIG. 7 is a timing chart explaining the operation of FIG. 5, and FIG. 8 is a block diagram showing the essential parts of still another embodiment of the present invention. 9 is a diagram showing an example of a trill musical score realized by the circuit of FIG. 8, and FIG. 10 is a graph showing an example of a musical tone to which grace notes are added generated by the circuit of FIG. 8. 4. ．． ．． ．． ．． ．． Counter for setting grace note length, 5...
．． ... Adder, 7 ... Selection switch for setting the pitch of grace note, 11 ... Envelope generation circuit, 12
. . . Adder addition/subtraction operation mode selection switch, 16 . . . Clock oscillation source, 19 . . .
...Memory that stores a large number of pitch values for grace notes. Figure 10 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. In an electronic musical instrument that generates a code signal with content corresponding to a pressed key, and generates a musical tone of the pitch of the pressed key based on this code signal, a predetermined interval between the sounding intervals of the pressed key is comprising a device that modulates the code signal of the pressed key into a code signal having a predetermined pitch, and during the predetermined period, generates a musical tone of a predetermined pitch for the pressed key based on the modulated code signal; The electronic musical instrument generates a musical tone based on the code signal of the pressed key when the period is other than the predetermined period.