JPH087587B2 - Musical sound generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is different in correspondence with touch data (so-called initial touch data and after-touch data, which are speed / pressure data to which a performance input such as key depression, string play, and wind performance is applied). The present invention relates to a musical tone generating device having a touch control function for generating musical tones .

[0002]

2. Description of the Related Art Conventionally, in a musical tone generating apparatus having a touch control function as described above, as shown in FIG. The sine wave waveform data is read as a waveform, and based on this sine wave waveform data, sine waves having different pitches, for example, overtone relationships, are independently provided from four lines, respectively.
1 to 2-4 are output. And each sine wave 2-1 to 2
-4, the touch control units 3-1 to 3-4 perform touch control with different touch curves (sensitivity), and output the sine wave waveform output of four lines whose level is controlled corresponding to the touch. The adder 4 synthesizes them to form a synthesized tone waveform, and the envelope controller 5 obtains a tone by changing the output level with time based on the envelope added by the envelope generator.

However, such conventional tone generation
Since the device can set only the same tone waveform for 4 lines, even if different touch controls are performed for each 4 lines of the same tone waveform, for example, in the case of performance input with a large touch (strong touch) There is a problem that it is difficult to obtain musical tones that occur only in and only musical tones with little change in tone color can be generated.

Further, in another conventional tone generating apparatus , as shown in FIG.
As shown in (a), a plurality of different musical tone waveform data are read from the waveform memory 1 and four DCOs 6-1 to 6-4 are read.
From the DCO 6-1 and the DCO 6-2 and mixes the output data from the DCO 6-1 and the DCO 6-2 in the mix circuit 7-1.
Sound source line 1 of DCO6-3 and D
The output data from the CO 6-4 is mixed by the mix circuit 7-2 to form the second sound source line 2. Here, in the mix circuits 7-1 and 7-2, the DCO6
When mixing the output data of -1 to 6-4, the velocity control units 8-1 and 8-2 control the mix ratio corresponding to the touch data, and further the envelope control unit 9-
After controlling the level of the output data at 1 and 9-2 by the passage of time, the mix circuit 10 mixes the output waveforms of both sound source lines 1 and 2 to obtain a desired musical sound. Here, as an example, the mix circuit 7-1.
As shown in FIG. 7B, when the output data of the DCO 6-1 is FW and the output data of the DCO 6-2 is PW,
The FW is m (0 ≦ m ≦ corresponding to certain velocity data
1), PW is mixed at a ratio of 1-m. As parameters in this case, when m when the velocity data is minimum (MIN) and m when the velocity data is maximum (MAX) are specified, the value of m shown on the straight line connecting the values of both of them is between them. It is the mix ratio of the output data FW corresponding to the velocity data.

However, such a conventional musical tone generating device is
In the installation , the DCO 6- that configures the plurality of sound source lines 1 and 2
Although different tone waveform data can be individually set for 1 to 6-4, the mix ratio in the mix circuits 7-1 and 7-2 can be changed only linearly with respect to the velocity data. It is difficult to output only one type of tone waveform data in correspondence with the velocity data, and a mixture of multiple tone waveforms will always be output, and you can freely change the mix ratio according to the velocity data. There is a problem that it is difficult to generate musical tones of various tones corresponding to velocities because the degree of setting is small.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a tone generating device capable of freely changing the tone color of a tone corresponding to touch data (initial touch data and aftertouch data). The purpose is to get.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to achieve the above-mentioned object. A plurality of sound source lines are formed by combining a plurality of waveforms, and a touch curve is set by a touch curve setting means. The touch sense split point data is set by the touch sense split point data setting means, and the touch data of the touch data is set by the touch control means.
Value is touch sense split point for each sound source line
Touch sense split set by data setting means
For each sound source line based on whether or not points are exceeded
The tone waveform output to the
Parameter set for each sound source line by the data setting means.
Based on the touch data controlled in response to the curve
Touch the level of the sound waveform that is output for each sound source line
The point is that the plurality of output waveforms are controlled to be synthesized into one musical tone waveform by the synthesizing means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An electronic musical instrument according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall circuit configuration diagram of this electronic musical instrument. A plurality of musical tone waveforms of different types are stored in a musical tone waveform memory 11 as digital data by PCM. The CPU 12 reads out predetermined waveform data from the tone waveform memory 11 based on the data of the key code given by the key depression of the keyboard section 13. Further, the CPU 12 takes in velocity data corresponding to the key pressing speed of the keyboard unit 13 detected by the velocity detecting unit 14, and sends waveform data selected and level-controlled based on the velocity data to the tone generator unit 15. Sound source section 15
Outputs musical tone waveform data whose waveform is controlled by velocity based on the waveform data sent from the CPU 12, and the D / A converter 16 converts the digital data into L and R stereo analog signals. To be done. Further, this stereo signal is amplified and filtered by the preamplifier / filter unit 17, and the mixing unit 18
The stereo signal is mixed at, and is output as a desired musical sound through the power amplifier section 19 and the speaker section 20.

FIG. 2 shows a concrete circuit configuration of the sound source section 15 in FIG. 1, and four DCOs 21, 22, 2 are provided.
Waveform data of different types are individually assigned to the CPUs 1 and 3 and 24
Read by 2. And DCO21 and DCO2
2 and one form a sound source line α, and DC
The sound source line β of the other set by O23 and DCO24
Is configured. The sound source line α and the sound source line β are
The velocity control units 25 and 26 are connected to the envelope control units 27 and 28, respectively, and both sound source lines α,
The output waveform at β is added by the adder 29 and output as one musical tone waveform.

Now, the waveform data f corresponding to a large velocity is set in the DCO 21 and DCO 23,
Waveform data mp corresponding to a small velocity is set in the DCO 22 and DCO 24, and the velocity control units 25 and 26 further control the level of the waveform data in accordance with the velocity data as shown in FIG. Touch table data shall be set. Here, the touch table data is a velocity curve data, that is, a coefficient (for example, 0 to 255) that changes in response to an increase in velocity data (for example, 0 to 127) and is multiplied by the waveform data, and a velocity split point. It consists of data. Further, when an envelope having a shape as shown in FIG. 2, for example, is applied to each of the envelope control units 27 and 28 from an envelope generator (not shown), the velocity-controlled sound source line α based on the velocity curve described above, Both the waveform data of β are level-controlled according to the envelope in accordance with the change of time, that is, in response to the lapse of time from the start of the key depression operation on the keyboard portion 13, and the envelope characteristic is given. After that, both waveform data are added by the adder 2
It is added at 9.

That is, according to the touch table data shown in FIG. 3A, the tone waveform output from the tone generator line α has waveform data from mp to f with the velocity split point as a boundary when the velocity level gradually increases. Since the sound source line β outputs exactly the same musical tone waveform, the adder 29, that is, the sound source unit 15, similarly changes the waveform data from mp to f at the velocity split point. The tone waveform that it has is output. That is, the DCO to be used is switched depending on the velocity with the set velocity split point as a boundary.

Further, the DCO 21 and D of the sound source line α
When the waveform data f and mp are set in the CO 22 and the waveform data mf and mp are set in the DCO 23 and DCO 24 of the sound source line β, respectively, from the sound source unit 15 via the adder 29, as shown in FIG. b)
A velocity-controlled musical tone waveform is output by the velocity control units 25 and 26 based on the velocity curve and the two velocity split points shown in the upper and middle rows. That is, when the velocity gradually increases from 0, first the DCO 22 and DCO 24 are used to output the waveform data (mp + mp), and after the first split point, the DCO 22 and DCO 23 are switched and used, and the waveform data (mp + mf) is used. Output, and DCO21 and D when passing the next split point
CO23 and CO2 are switched and used, and waveform data (f +
mf) will be output.

Further, the waveform data p and mp are set in the DCO 21 and DCO 22 of the sound source line α, and the velocity control unit 25 sets the touch table data as shown in the upper part of FIG. 3C, that is, the velocity curve and velocity. The split point is set, the waveform data f and mf are set in the DCO 23 and DCO 24 of the other sound source line β, respectively, and the velocity control unit 26 sets the velocity curve and velocity split as shown in the middle part of FIG. When the point and are set, the tone generator 15 outputs a tone waveform whose tone color is changed based on the velocity as shown in the lower part of FIG. 3C via the adder 29. That is, the velocity is 0
When it gradually increases from DCO22 of the sound source line α
Is used to output waveform data p, and at the first split point with the smallest velocity value, the DCO 21
And the waveform data mp is output. When the velocity further increases and passes the second split point, it is switched to the sound source line β this time, the DCO 24 is used to output the waveform data mf, and it is switched to the DCO 23 at the third split point having the largest velocity value. Then, the waveform data f is output.

FIG. 4 is a graph showing a level characteristic with respect to time of a PCM waveform as an example of the musical tone waveform stored in the musical tone waveform memory 11. When the PCM waveform is read, the waveform rises at the start address point and ends. At the address point, the reading of the waveform data ends, but at the loop address point, after reading to the end address point once, it returns to this point and then indicates the address to be read repeatedly between the end address and the loop address. Is.

FIG. 5 shows a memory format of various data as tone color parameters stored in the memory section of the entire electronic musical instrument including the tone waveform memory 11. As shown in FIG. 5 (a), this memory format is such that which waveform data or envelope should be selected when any one of 88 keys corresponding to the note names A _{0 to} C ₈ of the keyboard section 13 is pressed. Key-corresponding data A _{0 to} C ₈ for instructing a key etc.,
A waveform address map that stores the start and end addresses of the actual tone waveform, as shown in FIG. 4,
Envelope data of the envelope given to the envelope control units 27 and 28, touch table data having the characteristics shown in FIG. 3 set in the velocity control units 25 and 26, and waveform data waiting for actual tone waveform data. Made of.

FIG. 5B is an example of the key correspondence data corresponding to the key A ₀ , which is composed of two lines, a sound source line α and a sound source line β, and two DCOs for each line.
FW #, PW #, envelope #, touch table #, and pitch data indicating waveform numbers corresponding to 21, 22 and DCOs 23, 24 are stored. Here, # is unspecified data indicating a number. That is, FIG.
Waveform data αFW # for the DCO 21 is set at the top address in (b), and waveform data αPW # for the DCO 22 is set at the next address. At the next three addresses, the envelope data αENV # to be set in the sound source line α in order, the number touch table # for setting the touch table data, and the key of the key A ₀ that specifies the speed of reading the waveform data. Pitch data corresponding to the code number is stored in memory. Further, at the next five addresses, the same kind of data corresponding to the sound source line β, βFW #, βPW #, and βENV, are similarly generated.
#, Β touch table # and pitch data are stored in order.

FIG. 5C shows the contents of the waveform address map, in which the start address, end address, and loop address are sequentially stored for each waveform data number (type).

FIG. 5D shows the contents of the touch table data. For each touch table type (number), the velocity split point (the value of the velocity to be split) and the velocity in 128 steps from 0 to 127 are shown. Touch data corresponding to the data, that is, data defining the velocity curve is stored in order.

Next, regarding the embodiment having the above-mentioned structure,
The operation will be summarized below. Now, the key A ₀ corresponding to the note name A ₀ in the keyboard 13 is assumed to have been the key depression. CPU
12 reads the key code of the pitch A ₀ , and the key code causes the tone waveform memory 11 to read the key-corresponding data shown in FIG. 5B, the touch table data shown in FIG. 5D, the envelope data, and the pitch. Access each data. Then, the velocity detection unit 14 detects the key pressing speed (velocity) and creates velocity data. Further, the velocity split point data is read, and the magnitude of this data is compared with the velocity data previously created.
Which DCO of the CO 22 should be used, that is, which of the αFW # data and the αPW # data in FIG. 5B is to be used is selected, and one of the selected waveform numbers is checked, The type of waveform data corresponding to the number is read at a speed according to the pitch data. The same operation is performed on the other sound source line β to read out predetermined waveform data.

Further, as shown in FIG. 5 (a), the envelope data stored in the memory corresponding to the key code of the key A ₀ is read out and set, and then touch data corresponding to the previously set initial touch is set. An envelope is generated by multiplication, and the envelope control units 27, 2
In 8, the envelope is added to the waveform data that has passed through the velocity control units 25 and 26.

By operating in this way, in this electronic musical instrument, if the waveform data and velocity curve and velocity split point as shown in FIG. 3A are set in the tone generator lines α and β, the timbre changes due to velocity. It is possible to obtain a detuned effect by providing a pitch difference between the waveform data of both sound source lines. Further, when the data setting as shown in FIG. 3B is performed, it becomes possible to generate a musical tone in which three velocity regions are generated and a variety of timbre changes are made. Further, by setting the data as shown in FIG. 3 (c), four velocity regions are created, and the tone data that is more varied is made by the waveform data p, mp, mf, and f.

In the above embodiment, four DCOs are used to form a set of two DCOs to form two sound source lines, but the number of DCOs and the number of sound source lines are not limited to this. Further, the number of velocity split points may be further increased, and it becomes possible to generate musical tones by further varying tone color changes.

Further, the velocity curve data and the velocity split point data may be prepared in advance or may be arbitrarily set by the user. Further, the touch control may be performed not based on the initial touch related to the key pressing speed at the time of key pressing, but based on the data based on the aftertouch related to the change in the strength for maintaining the key pressed state.

Furthermore, the present invention is not limited to keyboard musical instruments, but can be applied to various musical tone generators such as electronic string instruments, electronic wind instruments, and sound source modules.

As described above, according to the present invention, a plurality of sound source lines are formed by combining a plurality of waveforms, and the touch data value is the touch sense for each sound source line.
The tap set by the split point data setting means
Based on whether the Chissen split point is exceeded
And changing the tone waveform output for each sound source line
Both, each sound source line by the touch curve data setting means
Each touch curve is controlled according to the touch curve set for each
Sound waves output for each sound source line based on
Touch control the level of a shape and synthesize multiple output waveforms
Since it is composed into one musical tone waveform by means , the tone color can be freely set according to the change in touch such as strength and speed in the performance input to generate a variety of musical tones. There is an effect that it is possible to obtain a musical sound generating device that has an extremely high performance effect.

[Brief description of 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 a circuit configuration diagram of a sound source section in FIG.

FIG. 3 is an explanatory diagram of a mode in velocity control.

FIG. 4 is a graph of a PCM waveform electronic musical instrument.

FIG. 5 is a memory format diagram in a memory unit such as a tone waveform memory.

FIG. 6 is a circuit configuration diagram of a sound source section in an example of a conventional electronic musical instrument.

FIG. 7 is a circuit configuration diagram of a sound source section in another example of a conventional electronic musical instrument.

[Explanation of symbols]

 11 tone waveform memory 12 CPU 14 velocity detection unit 15 sound source unit

Claims (1)

[Claims] 1. A waveform generating means capable of generating a plurality of tone waveforms for each sound source line, a touch curve setting means for setting a touch curve corresponding to touch data for each sound source line, and each sound source. A touch sense split point data setting means for setting a touch sense split point for each line, and a value of the touch data is set for each of the sound source lines.
Set by Chisense split point data setting means
The touch sense split point is exceeded
Musical sound waveform output for each sound source line based on
And the touch curve data setting means
To the touch curve set for each sound source line above.
Each sound based on the touch data controlled accordingly
Touch control means for touch-controlling the level of the tone waveform output for each source line, and the output waveform touch-controlled by the touch control means
And a synthesizing unit for synthesizing a musical tone waveform to obtain a musical tone waveform .