JPS60235197A - Electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic musical instrument that automatically generates sound effects when a key is pressed.

[Prior art]

Conventionally, in order to accentuate a performance, keys 7 (an interlocking percussion device l that moves in sequence to generate percussion instrument sounds),
Furthermore, hand percussion devices have been put into practical use that generate percussion instrument sounds in response to switch sweeps, regardless of key presses.

[Problems with conventional technology]

61J interlocking percussion equipment generates a percussion sound for each press, so when playing an intense song, the percussion sound is constantly generated, and on the other hand, when playing a quiet song, no percussion sound is generated for a while. On the contrary, there are problems that hinder performance.

Furthermore, since the hand percussion device does not require extra switch operations, there is a problem in that especially when playing an intense piece of music, the switch operations may be delayed and appropriate performance effects may not be obtained.

[Purpose of the invention]

To provide an electronic appliance capable of generating appropriate sound effects suitable for the performance state of both intense and quiet music.

[Key points of the invention]

The sound effect generation state is automatically controlled according to the key pressing speed.

[First Embodiment] The first embodiment will be described below with reference to FIGS. 1 to 4. FIG. 1 is an overall circuit diagram. A plurality of keys are displayed on the keyboard 1, and a key switch circuit 2 is provided with a key switch that is linked to each key. Then, the output of the corresponding key switch, which turns on and off in response to key depression and key release operations, is given to the key depression/deception speed detection circuit B, which outputs the key code KYOD of the key and the key depression speed signal KYP.
]'( is created. Then, the key 1' KYOD is given to the tone forming circuit 4c, and the key pressing speed signal KYP is
It is applied to the A input terminals of the R-key tone forming circuit 4, the comparison value forming circuit 5, and the comparator 6.

The musical tone forming circuit 4 includes a circuit that generates a frequency signal corresponding to the pitch of 'YCD' on the key code, a circuit that generates an envelope waveform signal, and generates a musical tone signal by multiplying the frequency signal and the envelope waveform signal. This musical tone signal is then given to the sound system 7 and emitted as a musical tone.

A series of key press speed signals KYP input to the comparison value forming circuit (5 digits)
Perform calculations such as taking R or its average, and use the needle speed command for this time @
A comparison value signal KYME for KYPR is generated 7 and applied to the B input terminal of the comparator 6.

Comparator 6 is the key pressing speed value % to the surface input terminal K Y P
R and the comparative Buddhist monk 5JK y Mv are compared, and the difference value is outputted from the output terminal O as a difference signal generator F, and is applied to the percussion instrument sound addition selection circuit 8. This percussion instrument sound addition selection circuit 8 outputs a signal BDS for generating a bass drum sound and a signal SYS for generating a cymbal sound according to the value of the difference signal D1F, and controls an OR gate 96 or 97 in the automatic rhythm device 9. The signal is applied to the rhythm sound source circuit 94 via.

The automatic rhythm device 9 includes a variable tempo oscillator 91, a tempo counter 92 that counts the tempo signal TP from the tempo oscillator 91, and a tempo counter 92 that is addressed by the count signal 00 of the tempo counter 92, and outputs rhythm pattern data in parallel. It consists of a pattern memory 96 that is read out, and rhythm sound source circuits 94 that are provided in correspondence with each bit signal of the rhythm pattern data and generate each percussion instrument sound. Note that the bit signal of the bass drum sound among the pattern data is passed through an OR gate 96,
Further, bit signals of the cymbal sounds are applied to rhythm sound source circuits 94 through OR gates 97, respectively. The rhythm sound source circuit 94 then provides a composite signal of the outputs of the respective rhythm sound sources to the sound system 7 to emit a rhythm sound.

φ, FIG. 2 is a specific circuit diagram of the comparison value forming circuit 5.

The key press speed signal KYPR represents the actual key press speed value.
It consists of 8-bit data KPRD and a 1-bit signal KPR3 that is "1" when the key press speed signal KYPR is generated and "0" when it is not generated. The input signal is input to the X input terminal of the arithmetic circuit 100 and the input terminal of the selector 11. Further, the signal KPR8 is input as a driving signal to the register 110 in the averaging circuit 10 and the S input terminal of the selector 11, respectively, and directly to the register 12 via the OR gate 16.

The previous average value data K M E A N held in the register 110 is input to the Y input terminal of the settlement circuit 100 in the averaging circuit 10, and therefore the arithmetic circuit 100 inputs the average value data K M E A N held in the register 110. 0 for the data. ! l
A new average value is obtained by performing the averaging operation of
The data is taken into the register 110 via the output terminal.

The average value data 1jM E A N is also calculated by the arithmetic circuit 1.
Input to the X input terminal of 4. Therefore, this arithmetic circuit 14 also has O and l for each input data to the X input terminal and the X input terminal.
An averaging operation of X+0.9Y is executed, and the resulting data is applied to the A input terminal of the selector 11 via two output terminals. Therefore, the selector 11 sends the result data to this person's input terminal via the 0 output terminal, and the signal KPR8 is "0".
, the signal K is selectively output and given to the register 12.
When PR8 is “’B”, data KPR to S input terminal
D is selectively outputted and given to the register 12. Therefore, this register 12, the above message from OR gate 13 @xPRS
, or compress the data from the selector 11 using the clock φ that outputs ffs at a time interval of the note length of an eighth note, and transfer it to the X input terminal of the arithmetic circuit 14 and the comparison 1M correction circuit 15.
give to

ratio tli ((7M positive circuit 15 makes appropriate corrections to the input data, for example, when the absolute J level is small, it is corrected slightly by &lT), and conversely, when it is large, it is greatly corrected and the comparison value signal K Y M y, Circuit that outputs by closing
There is C.

Next, the operation will be explained with reference to the waveform diagrams of FIGS. 3 and 4. When a key on the keyboard 1 is operated, a key switch for that key in a key switch circuit 2 is turned on and off, and a key press-key press speed detection circuit 3 generates a key code KYOD and a key press speed signal KYPR.

And key code KY OD % key press speed signal KYPR
are both input to the musical tone forming circuit 4, and the key pressing speed signal KY
PR is further input to the comparison value forming circuit 5 and the A input terminal of the comparator 6.

The musical tone forming circuit 4 creates a musical tone signal based on the input signal and causes the sound system 7 to emit the musical tone of the operating key.

On the other hand, in the automatic rhythm device 9, a tempo counter 92 counts the output of the tempo oscillator 91 and addresses a pattern memory 93 with the count signal 00, for example, 1.
The pattern data of the set rhythm is read out and applied to the rhythm sound source circuit 94 repeatedly in bar units. Therefore, each rhythm sound source is driven according to the input pattern data, and the rhythm sound signal is sent to the sound system 7 and emitted as an automatic rhythm sound.

Further, in the comparison value forming circuit 5, the press! 1! Speed signal KY
PR is 8-bit data KP representing the actual key pressing speed value.
RD and 1 A 1-bit signal KPR3 indicating the presence or absence of its occurrence.
The data KPRD is output as
The signal KPR8 is applied to the X input terminal of 0 and the S input terminal of the selector 11, and the signal KPR8 is applied to the register 110 and the selector 11.
The signal is applied to the S input terminal of the register 12 and the register 12 as a drive signal.

Therefore, the signal KPR8 of 6'1'' is generated in response to the actual key depression.
is output together with the data KPRD, the arithmetic circuit 100 calculates 0.1 .9Y
The following calculations are performed to obtain new average value data for the series of key pressing speed data XPRD, and this data is loaded into the register 110. Therefore, this new average value data KM1n
From then on, AN is connected to the Y input terminal of the arithmetic circuit 100 until the next key press.

and the X input terminal of the arithmetic circuit 14.

On the other hand, when the signal KPR8 is generated as "1", the selector 11 selectively outputs the data KPRD to the S input terminal, causes it to be taken into the register 12, and supplies it to the X input terminal of the arithmetic circuit 14 and the comparison value correction circuit 15. . Therefore, at this time, the arithmetic circuit 14 performs a calculation of 0.1X + 0.9Y on the new average value data KMEAN to the X input terminal and data KPRD to the X input terminal, and calculates a series of key presses. New average value data of the speed average value data KMEAN and the current key pressing speed data KPRD is obtained and is applied to the A input terminal of the selector 11.

On the other hand, if the key is not pressed for a period longer than the eighth note note duration, an Illu clock φ will occur at the interval of the eighth note note duration.
is applied to the register 12 as a drive signal, so the register 12 takes in the data from the A input terminal of the selector 11 at this time (because the signal KPR8 is "0"') and sends it to the X of the arithmetic circuit 14. It is applied to the input terminal and comparison value correction circuit 15. Therefore, the arithmetic circuit 14 at this time:
An average calculation of 0.1x+0,9y is performed on the average value data KM1nAN and other average value data to obtain a new average value booter, which is applied to the input terminal of the selector 11. Then, the comparison value correction circuit 15 applies a predetermined correction to the input data and applies it to the B input terminal of the comparator 6 as a comparison value signal KYME.

Each time there is a new key press operation, the comparator 6 calculates the difference between the data KPRD in the key press speed signal KYPR sent to the B input terminal and the comparison value signal KYME sent to the B input terminal, and calculates the difference signal F. is output and given to the percussion instrument sound addition selection circuit 8.

When the input difference signal is less than the 1st level, this circuit 8 outputs the signal BDSSSYS of "O" and supplies it to the rhythm sound source circuit 94, so neither the bass drum sound nor the cymbal sound is generated, and no accent is added. will not be done. That is, in this case, the magnitude of the current key pressing speed is closest to the magnitude of the comparison value signal KYMK.

Further, when the differential signal value F is between the second level and the second level, which is larger than the second level, the signal BDS is changed to Ojl,
The signal SYS is generated as “1” and the rhythm sound source circuit 94
give to As a result, cymbal sounds are generated, adding the weakest accent to the performance.

Furthermore, the differential signal T1' is at the second level and the third level (
When the value is between the second level (third level), the signal BDS is generated with the 1st signal sys as '0', and a bass drum sound is generated. Therefore, a moderate accent is added.

Furthermore, when the difference signal]]1F has a value of the third level or higher, both the signals EDS and SYS are generated as "1", and both the bass drum sound and the cymbal sound are generated, and the maximum accent is added.

Figure 3 shows an example of how accents are added when playing with dynamics. In the figure, "A 11" is the accent mark symbol, and "Ot x" for the signals BDS and SYS are " It means 1″, 0″. As the song progresses, the vertical lines shown above the notes indicate the key pressing speed of each note, the solid horizontal lines indicate the average value data IMEAN, and the dotted lines indicate the average value data taken into the register 12. shows.

Therefore, the first note at the beginning of the song (the first 16th note in the quadruplet)
For the musical note), since it is the first musical tone, a predetermined value is preset as the average value data KYME to the B input terminal of the comparator 6, and the key pressing speed signal KY at that time is preset to the B input terminal of the comparator 6.
Compared to PR.

In this case, since the value of the differential signal generator P suddenly exceeds the third level, both the bass drum sound and the cymbal sound are generated, and the maximum accent is added.

The second, third, and fourth musical tones have the same key depression speed as the first musical tone, and the interval between key depressions is shorter than the note duration of an eighth note. The key pressing speeds of the musical tones, the second and third musical tones, and the third and fourth musical tones are compared (see the function of the selector 11 described above). Therefore, the differential signal generator F has no difference at O level, and no accent is added to each signal. During this time, the averaging circuit 10 successively obtains new average value data KMKAN, the arithmetic circuit 14 also obtains new average value data, and the difference between the two becomes smaller.

Next, when the fifth musical tone is pressed at an interval of 16th note length from the fourth musical tone, and at a lower level than the fourth musical tone, in this case, the level is naturally lower, so no accent is added.

Next, when the sixth musical tone is pressed at an even lower level than the fifth musical tone at an interval equal to the length of a quarter note, of course no accent is added. Therefore, the clock φ is output only once during the key depression of the fifth to sixth musical tones, and at this time, the average value data from the input terminal of the selector 11 is selectively outputted and given to the arithmetic circuit 14. As shown in the figure, the new average value data becomes approximately the same as the average value data KMEAN of the series of key press speed signals (data KPRD). When no key is pressed for a period longer than the diacritic length, both average value data have values close to each other, and therefore the comparison value signal KYME is close to the average value data KMEAN, and can depend on the average value more than the previous key press speed. It looks like this.

The state of accent addition for the seventh musical note and below is the same as described above, and a detailed explanation thereof will be omitted.

FIG. 4 shows a state in which the player is playing in a generally weak tone. The accent addition state is the same as that shown in FIG. 3, and its explanation will be omitted.

[Second example] FIG. 5 shows the comparison value forming circuit 5 of the second embodiment.

That is, the comparison value forming circuit 5 of the second embodiment is obtained by omitting the comparison value correction circuit 15 of the comparison value forming circuit 5 of the first embodiment, and the substantial effect is the same as that of the first embodiment. .

Although percussion instrument sounds were used as the sound effects in the embodiment described in 0↑j, other types of sound effects may be used.

〔Effect of the invention〕

As explained above, this invention is an electronic musical instrument that automatically controls the sound effect generation state according to the key pressing speed, so whether it is an intense song or a quiet song, it always matches the performance state at the time. This has the advantage of generating appropriate sound effects and improving the performance effect.

[Brief explanation of the drawing]

Figures 1 to 4 show a first embodiment of the present invention, Figure 1 is its overall circuit diagram, Figure 2 is a specific circuit diagram of the comparison value forming circuit 5, and Figure 3 is an accent for intense music. FIG. 4 is a diagram showing an accent addition state for a quiet piece of music, and FIG. 5 is a specific circuit diagram of the comparison value forming circuit 5 of the second embodiment. DESCRIPTION OF SYMBOLS 1...Keyboard, 2...Key switch circuit, 6...Key press/key press speed detection circuit, 4...Music tone forming circuit, 5...
- Comparison value forming circuit, 6... Comparator, 7... Sound system, 8... Percussion instrument sound addition selection circuit, 9... Automatic rhythm device, 100 'II' 14... Arithmetic circuit, 11 ...Selector, 12.・110...Register, 15...Comparison value correction circuit.

Claims (1)

[Scope of Claims] Comparison value forming means for forming a comparison value for the current key depression speed from the detection signal, comparison means for comparing the comparison value with the current needle depression speed, and a comparison result of the comparison means. a control means for controlling the generation state of a predetermined sound effect based on the control means; a sound effect generation means for generating the sound effect under the control of the control means; and a musical sound generation means for generating the musical tone of the key. Characteristic electronic musical instruments. (2) The electronic musical instrument according to claim 1, wherein the comparison value forming means is a means for calculating an average value of the series of key pressing speeds and using it as the comparison value. (3) The comparison value forming means sets the previous key depression speed to seven different comparison values when the key depression interval is within a predetermined time;
2. A real child musical instrument according to claim 1, characterized in that when the key press interval is longer than a predetermined time, the average value of the series of pressing speeds is used as a new comparison value.