JP2570945B2 - Tone generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a performance operation.
Musical tone based on touch (speed / pressure at which performance input is applied)
The tone of the sound,
Add a detune effect to give a more natural look
Tone generator that generates musical tones that resemble musical instruments
About the improvement.

[0002]

2. Description of the Related Art
A musical sound generator such as an electronic musical instrument generates a musical sound generated by a natural musical instrument.
It is intended to be generated electronically and has various technical modifications.
Good things have been done. One of them is a piano
A natural instrument is generated by the key pressing speed (touch) of the keyboard
Focusing on the subtle changes in the tone of the musical tone,
Prepare a tone waveform that represents the tone of the
Depending on the speed value, the desired musical tone
Those who read sound waveforms and generate musical tones of the corresponding tone
An expression has been proposed. However, according to this method,
When the key pressing speed exceeds a certain value, the tone waveform switches.
Tone changes suddenly, and the key pressing speed like a natural musical instrument
The disadvantage that the tone of the musical tone does not change smoothly depending on the degree
There is.

In order to eliminate such unnaturalness,
It is necessary to add a loose velocity crossfade function.
Is required. This has the two sound sources lines, assign a strong wave and weak waveforms each line, as shown in FIG. 5, when the velocity (touch) data is small, that is the speed of performance input such as key depression When the speed is slow, a weak waveform based on the velocity curve as shown in the β touchta curve is emitted from one power supply line, and when the velocity data becomes large, the other sound source line changes to the velocity curve as shown in the α touch curve. A strong waveform based on it sounds. In the velocity crossfade section, the tone of the timbre based on the weak waveform and the tone of the timbre based on the strong waveform are mixed in a crossfade state and sounded, and the tone is formed by waveform synthesis by varying the mix ratio. doing. If this method is used , switching of musical tones does not appear remarkably, and unnaturalness is eliminated. Only
However, the musical tones emanating from natural instruments are simply
It is not only a simple thing that the tone changes according to the speed,
Electronic musical sounds have undulations and depth. Normal
To give such an effect, the tone waveform of both sound source lines
Shift the frequency of the sound, a so-called detune effect.
However, with the above configuration, both sound source
Sound waves with different frequencies are generated simultaneously
This is because only the crossfade section is
That the detune effect is not so clear.
There is a problem.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a transition from a tone of one tone to a tone of a different tone in response to a touch, such as a tone generated from a natural musical instrument. with a mu's, and an object thereof is to provide a musical tone generating apparatus can also be applied effectively detuning the tone.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a performance data generating means for generating touch data corresponding to a pitch frequency and a performance speed corresponding to a pitch designation operation, and an assigned musical tone waveform and an assigned tone waveform. A tone generating means having a plurality of tone generator lines for generating tone signals based on pitch frequencies and controlling the level of the tone signals based on the assigned control data and outputting the tone signals; touch and waveform memory means for storing tone waveform, the value of each predetermined touch data at the each source line of
Split position setting means for setting as a sense split point, and means for allocating a musical tone waveform stored in the waveform storage means for each of the sound source lines, wherein the value of touch data from the performance data generating means is the split position. Touch sense split set by the setting means
Touch points based on whether
A waveform assigning means for switching and selecting a tone waveform assigned to a sound source line corresponding to a sense split point; and a conversion table for each of the sound source lines, wherein touch data from the performance data generating means is transmitted to each of the sound source lines. A control data allocating means for converting the control data into control data in the conversion table and allocating the control data to the corresponding sound source lines, and a frequency different from the pitch frequency from the performance data generating means as a reference. The main point is that a frequency allocating means for allocating each sound source line is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an electronic keyboard instrument will be described below with reference to the drawings. FIG. 1 is an overall circuit configuration diagram of this electronic musical instrument. A key press input as a performance input by a player is detected by a keyboard unit 1.
Further, the key press speed, that is, the velocity of the initial touch is detected by the velocity detection circuit 2 from the performance input. The detected velocity data is applied to a central processing unit (CPU) 3 of the microprocessor.
Numeral 3 reads out different tone waveform data for two sound source lines from a tone data memory 4 storing tone waveform data on the basis of pitches and other characteristics based on performance input and velocity data. Based on the two types of tone waveform data, tone waveform data having different waveforms are generated for two sound source lines from a tone signal forming circuit 5 constituting a plurality of tone signal forming means. Further, in the tone signal forming circuit 5, the frequencies of the tones to be generated can be set separately, and different frequencies can be set by adding detune data to the CPU 3 in the detune setting section 6. Also,
The velocity split point and velocity curve data are added to the CPU 3 by the velocity parameter setting unit 7. Tone signal forming circuit 5 controlled by CPU 3
The two-line musical sound waveform data generated from the analog signal is converted into two-line analog signals α and β by a D / A converter 8, and the two lines are mixed into one line and amplified by a mixing circuit 9. A musical tone with a detune effect is emitted.

FIG. 2 is a musical tone data memory explanatory diagram showing musical tone data stored in the musical tone data memory 4.
One of the sound source lines α in the tone signal forming circuit 5
The data relating to the line and the data relating to the β line, which is the other sound source line, are stored separately for each address corresponding to each tone name. For example, the key C _{4 of the} keyboard 1
As the data in the memory area corresponding to the key depression, the data of the α velocity split point is stored in the address 1000, and the data (hereinafter, address 1001 to address 1006) relating to the α-strong waveform ( The start address, end address, loop start address, and velocity curve data of the waveform ROM), data on the α weak waveform, data on the β velocity split point, data on the β strong waveform, and data on the β weak waveform are respectively stored. Then, in the memory area corresponding to the addresses 1006 to 1011, the data of the α line and the β line corresponding to the next key C ₄ ^# are stored.

FIG. 3 is a graph showing a velocity split tone waveform for explaining the operation of this embodiment. The horizontal axis represents the velocity, which is the strength of key depression on the keyboard 1, and the vertical axis represents the tone signal formation. The output levels of the α musical sound waveform and the β musical sound waveform which are divided into two lines of an α line and a β line in the circuit 5 and separately formed are shown.
Now, for example, if the key C ₄ is depressed, as shown in FIG. 3, from the α line of source lines, advance velocity parameter tone signal with a mute sound when velocity is small, α setting section 7 Occurs at a level according to the α touch curve which is the velocity curve set in. When the velocity exceeds the α velocity split point set in advance by the velocity parameter setting unit 7, the waveform for the strong sound, which is different from the waveform for the weak sound of the tone color of α being generated, follows the level according to the α touch curve. Occurs at

When the velocity from the other sound source line β line is smaller than the velocity point β set in advance by the velocity parameter setting unit 7,
A tone signal having a waveform for a weak tone of β tone color is generated at a level according to the β touch curve. And the velocity is β
When the velocity split point is exceeded, a waveform for a strong tone of the tone of β is generated at a level according to the β touch curve. Therefore, in this embodiment, two completely different tone lines having different waveforms are generated from the two independent sound source lines α and β based on the velocity parameters set independently of each other. The sound is mixed according to the touch curve.
Further, the frequencies of the tone signals generated from both sound source lines can be independently changed by the detune data from the detune setting unit 6 based on the pitch data obtained by key depression.

Next, the operation of this embodiment when the key C ₄ is depressed will be further described with reference to FIGS. 2 and 3 and a velocity split processing flowchart shown in FIG. This flow interrupts and starts when a key is pressed on the keyboard 1 with respect to a main flow (not shown) in the operation of the CPU 3. First, a scale number (key number) corresponding to a depressed note name is read, and a head address of a memory area in the tone data memory 4 corresponding to the key number is calculated (step A1). Then, the data stored at the calculated start address, that is, the data of the α velocity split point at the address 1000 shown in FIG. 2 is read, and thereafter, the address is incremented by 1 (step A2). Next, it is checked whether or not the velocity by the actual key input is larger than the α velocity split point just read (step A3), and YES
In the case of (1), the data related to the strong α waveform at address 1001 is read, and the address is incremented by 2 in order to further read the data for the β line (step A).
4). If NO in step A3, since the velocity data is smaller than the α velocity split point and data relating to the α weak waveform should be read, the address is incremented by 1 (step A5), and the process proceeds to step A4. After reading the data related to the α weak waveform at the address 1002, the address is incremented by 1 in order to read the data for the β line (step A4).

Subsequently, in step A4, the read data is processed, and a control signal for generating a tone signal of the .alpha. Line, which is one of the sound source lines, based on parameters set in advance by the velocity parameter setting unit 7. Is sent to the tone signal forming circuit 5 (step A6). Then, it is checked whether or not the velocity split processing corresponding to the key depression of both the α-line and β-line sound source lines has been completed (step A7). If YES, this flow is finished. This is a case where the velocity split processing for the β line has not been completed, and the processing returns to step A2, and the processing is repeated up to the same step A7 to execute the tone waveform generation processing for the β line.

[0012] In the step A6, in order to obtain the detuning, based on detune data preset by detuning setting unit 6, alpha line, the frequency corresponding to the key C ₄ tone waveform of β line both source line Is detuned with respect to each other, and a frequency control command is sent to the tone signal forming circuit 5.

In the above embodiment, the present invention is applied to an electronic keyboard musical instrument having the keyboard 1 as a performance input means. The present invention is also applicable to musical instruments capable of detecting data, such as electronic stringed musical instruments and electronic percussion instruments.

In the above embodiment, the touch control is performed based on the velocity curve (touch curve) and the velocity split point. However, the present invention is not limited to this, and the touch control is performed based on the after touch curve and the after touch split point by the after touch. I don't mind.

The mixing circuit 9 and the speaker 10
May be provided outside the main body of the electronic musical instrument and controlled by the main body and a MIDI cable, or the like, and the tone data memory 4 may be supplied from outside the main body in a format such as a ROM pack.

[0016]

As described above, according to the present invention,
Assign tone waveforms to each of multiple sound source lines,
This assigned tone waveform also corresponds to the value of touch data
The tone waveform is switched
The value of the touch data to be replaced is configured so that each can be set.
Since the frequency of the tone generated from each sound source line is made different from each other, the switching of the tone of the tone from one source line is masked by the tone of a different tone from the other source line. in smoothly without conspicuous, no unnaturalness and the tone subjected effective detuning effect can be given depth, this result, generation of the musical tone is that resembles more natural musical instrument
There is an advantage that it becomes possible.

[Brief description of the drawings]

FIG. 1 is an overall circuit configuration diagram for explaining an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a tone data memory stored in a tone data memory.

FIG. 3 is a graph showing a velocity split tone waveform showing a velocity split function.

FIG. 4 is a flowchart of a velocity split process for explaining the operation of a velocity split function.

FIG. 5 is a graph showing a velocity split tone waveform in a conventional electronic musical instrument.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Keyboard part 2 Velocity detection circuit 3 CPU 4 Music data memory 5 Music signal formation circuit 6 Detune setting part 7 Velocity parameter setting part

Claims (3)

(57) [Claims] A performance data generating means for generating touch data corresponding to a pitch frequency and a performance speed corresponding to a pitch designation operation, and generating a tone signal based on an assigned tone waveform and pitch frequency. A tone generating means having a plurality of sound source lines for level-controlling and outputting the tone signal based on the assigned control data; a waveform storing means storing a plurality of kinds of tone waveforms for each of the tone source lines; Touch the value of the specified touch data for each sound source line .
Split position setting means for setting as a touch sense split point; and means for allocating a musical tone waveform stored in the waveform storage means for each sound source line, wherein the value of touch data from the performance data generating means is Exceeds the touch sense split point set by the split position setting means
The touch sense split based on whether
Waveform assigning means for switching and selecting the musical tone waveform assigned to the sound source line corresponding to the sound point, and having a conversion table for each sound source line, and touch data from the performance data generating means for each of the sound source lines. A control data allocating means for converting the data into control data in the conversion table and allocating the control data to the corresponding sound source lines; and a frequency different from the pitch frequency from the performance data generating means as a reference. A tone generator, comprising: frequency assignment means for assigning each line. 2. The waveform storage means according to claim 1, wherein a tone waveform when the touch data has a large value and a tone waveform when the touch data has a small value are stored for each sound source line. Musical sound generator. 3. The tone generator according to claim 1, wherein said frequency assigning means includes a detune setting means for setting a frequency assigned to each of said sound source lines.