JPH0926787A - Timbre control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an intermediate sound of proper intermediate timbre from plural kinds of musical sound and a smooth change in timbre concerning the intermediate timbre by properly processings the sound source waveform and parameters other than those designating the sound source waveform respectively. SOLUTION: When sliders and buttons constituting an operating piece group 18 are operated, the CPU detects these operations. In this case, various kids of data corresponding to the conditions of the detected operation are held in a RAM 14 in which a P1 register, a P2 register, etc. are set. And, the CPU 10 reads and executes the program stored in a ROM 12 and controls a sound source 22 is accordance with the operating conditions of sliders and buttons forming the operation piece group 18 to set timbre based on the operation of the operation piece group 18 in the sound source 22. And, when an intermediate timbre mode is selected, the intermediate timbre of the intermediate sound is changed from the timbre allotted to P1 to that allotted to P2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tone color control device, and more particularly, to a tone color tone tone located between a plurality of tone colors in an electronic musical instrument and having a predetermined degree of association with the tone colors. The present invention relates to a tone color control device.

In the following, as described above,
A tone of a tone color (hereinafter, referred to as “intermediate tone”) having a predetermined degree of association with the plurality of tone colors in an electronic musical instrument is referred to as an “intermediate tone”, and an intermediate tone is , A tone that is located at a certain point between a plurality of tones during sounding and that is pronounced with a certain degree of relevance to the plurality of tones, and between a plurality of tones while the middle tone is sounding. And the musical tone produced while changing the degree of association with the plurality of timbres.

[0003]

2. Description of the Related Art In conventional electronic musical instruments, for example, the following two methods have been proposed in order to obtain an intermediate tone between two types of musical tones generated by a sound source. Was there.

First, the first method is to generate musical tone waveforms of the two types of musical tones, and to determine which position between the tone colors of the two types of musical tones the desired tone color corresponds to.
This is a method of performing so-called cross-fade processing in which the weighting of the tone waveform levels of the two types of musical tones is controlled according to the degree of association between the two types of tone colors to synthesize the waveform of the intermediate tone.

The second method is to interpolate parameters other than the parameters for designating the sound source waveforms for generating the musical tone waveforms from the sound source waveforms of the two types of musical sounds.
This is a method of generating a waveform of an intermediate tone by using one of the sound source waveforms of the two types of musical tones corresponding to a desired tone of the intermediate tone and an interpolated parameter.

[0006]

By the way, the musical tone produced by the sound source is not merely one sound source waveform that continues to sound endlessly, but the cutoff frequency of the filter, the resonance strength, and the envelope waveform. Various parameters other than the parameters that specify the sound source waveform, such as the pronunciation level, are changing, and the timbre is determined by the combined action of these parameters.

That is, the timbre of the musical sound produced by the sound source is determined by the sound source waveform and various parameters other than the parameters that specify the sound source waveform. It is necessary to perform appropriate control for each of the parameters other than the parameters that specify the sound source waveform.

Therefore, in the above-mentioned first method for obtaining the intermediate tone of the two types of musical tones from the two types of musical tones generated by the sound source, the generated two types of musical tone waveforms are simply generated. Since they are only mixed, the tone color of the musical tone generated from the waveform obtained by the first method is not an intermediate tone color but a mixed tone color in which two tone colors can be heard. .

Further, in the above-mentioned second method for obtaining the intermediate tone of the two kinds of musical tones from the two kinds of musical tones produced by the sound source, interpolation between the sound source waveforms cannot be performed. At a certain point between the two types of musical tones corresponding to the intermediate tone, it is necessary to switch the sound source waveform used for generating the musical tone waveform, and there is a problem that a smooth tone change cannot be performed.

The present invention has been made in view of the above-mentioned various problems of the prior art, and an object thereof is to obtain an intermediate tone of an appropriate intermediate tone color from a plurality of types of musical tones. It is an object of the present invention to provide a tone color control device capable of obtaining an intermediate tone whose tone color changes smoothly.

[0011]

In order to achieve the above object, the tone color control apparatus according to the present invention, when obtaining an intermediate tone from a plurality of types of musical tones, is a non-interpolable sound source among the parameters of the plurality of types of musical tones. For the sound source waveform generated based on the parameters that specify the waveform, a filter that can change the value continuously among the parameters of multiple types of musical tones while performing weighting control of the waveform level to perform cross fade processing. With respect to the interpolable parameters other than the parameters for designating the non-interpolable sound source waveform, such as the cutoff frequency, the interpolation control is performed between the plurality of musical tones.

Note that the weighting control is, specifically, weighted mixing in which mixing is performed while weighting is performed by the combining means including the addition means.

In obtaining an intermediate tone from a plurality of types of musical tones, a waveform level weighting control is applied to a sound source waveform generated based on a parameter designating a non-interpolable sound source waveform among parameters of the plurality of types of musical sounds. In addition to performing cross-fade processing, regarding parameters that can be interpolated other than parameters that specify non-interpolable sound source waveforms among the parameters of the plurality of types of musical tones,
Interpolation control is performed between the plurality of musical tones, and appropriate processing is performed on each of the sound source waveform and the parameters other than the parameters that specify the sound source waveform, so that an appropriate intermediate tone color is obtained from a plurality of types of musical tones. It becomes possible to obtain a sound and to obtain a smooth change in tone color for the intermediate tone color.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the invention of a tone color control apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

First, the sound source control device according to the first embodiment of the present invention will be described.

FIG. 1 shows a block diagram of an electronic musical instrument provided with a tone color control device according to the present invention. This electronic musical instrument is provided with a so-called waveform reading type sound source.

The electronic musical instrument shown in FIG. 1 is configured to control the operation of the entire electronic musical instrument by using a central processing unit (CPU) 10. The CPU 10 is a read-only program that stores, via a bus line, a program for executing various processes to be described later with reference to a flowchart and various parameters for generating a musical tone waveform of each tone color. Memory (ROM) 12 and CPU 10
Random access memory (RAM) 14 as a working area in which various register groups necessary for executing the program are set, and keyboard information (keyboard information is key on (key on: Key ON: Key ON ) Based on the pitch information indicating the pitch (pitch) corresponding to the pressed key, key pressing information instructing the pronunciation of a musical sound of the pitch, and key release (key off). Keyboard 16 for outputting pitch information indicating a pitch corresponding to the released key and key release information for instructing the mute of a musical sound of the pitch based on Buttons for selecting preset tones as controls related to the implementation of, and sliders that specify the degree of association between two tones, that is, the position between the two tones that corresponds to the intermediate tone of the intermediate tone. Na More become operator group 18, an analog-digital converter for converting the analog data indicating the operation states of the operating element of the operation element group 18 to form the digital data can be processed by the CPU10 and (ADC) 20, C
Based on the control of the PU 10, the sound generation instruction / silence instruction based on the keyboard information output from the keyboard 16 and the operator group 20.
A sound source 22 for generating / stopping a musical tone signal by a waveform reading method is connected in accordance with a mode, tone color, etc. designated by the operation of each of the operators.

Note that the keyboard 16 is used to simplify the explanation.
When any key is pressed while all keys are released, the key information indicating the key pressing corresponding to the key is output, and the key information indicating the output key pressing is output. When the key corresponding to the key is released, the keyboard information indicating the key release corresponding to the key is output.

Therefore, when a plurality of keys are pressed, only the keyboard information corresponding to the first pressed key is output. Also, in order to simplify the explanation of the sound source 22,
Although it is assumed that a musical tone signal corresponding to one key depression can be generated, it is needless to say that the keyboard 16 and the sound source 22 can generate a plurality of musical tones corresponding to a plurality of key depressions. is there.

Further, the sound source 22 is a sound system including a digital-analog converter, an amplifier and a speaker for converting a tone signal in the digital data format outputted from the sound source 22 into an analog data format. 24 is connected so that the musical tone signal generated by the sound source 22 is emitted to the space as a audible musical tone.

That is, in this electronic musical instrument, when the sliders and buttons forming the operator group 18 are operated,
The operation is detected by the CPU 10. At that time, various data corresponding to the detected operation state is held in the RAM 14 in which the P1 register and the P2 register shown in FIG. 4 are set. And CPU1
0 is for reading and executing the program stored in the ROM 12, and controlling the sound source 22 in accordance with the operating state of the sliders and buttons forming the operator group 18. In the sound source 22, the operation of the operator group 18 is performed. The tone color is set based on.

Therefore, when the keyboard 16 is depressed, a musical tone is produced with the tone color set by the sound source 22 via the sound system 24.

FIG. 2 shows a schematic structure of an operation panel provided with an operator group 18. In this electronic musical instrument, the operator group 18 designates 16 preset tone colors. Tone buttons 18a to 18p, a fixed tone mode button 18q for selecting a fixed tone mode as a mode, an intermediate tone mode button 18r for selecting an intermediate tone mode, and 16 preset tone colors. To the first tone color of the two tone colors (hereinafter, the first tone color of the two tone colors is referred to as "P1"), the P1 button 18s for selecting the tone color and the second tone color (hereinafter The second tone of the two tones is referred to as "P2".) The P2 button 18t for selecting a tone to be assigned to the tone and the intermediate tone of the intermediate tone is between P1 and P2. Slider 1 that either corresponds to which position to specify the degree of association between the two tones P1 and P2
8u.

Therefore, in this electronic musical instrument, the fixed tone color mode can be selected by operating the fixed tone color mode button 18q, and the intermediate tone color mode can be selected by operating the intermediate tone color mode button 18r. Fixed tone mode button 18
The mode is switched by operating q and the intermediate tone mode button 18.

When the fixed timbre mode is selected, only the musical tone of the timbre assigned to P1 is sounded, and when the intermediate timbre mode is selected, it depends on the position of the slider 18u. The intermediate tone color of the intermediate tone changes from the tone color assigned to P1 to the tone color assigned to P2.

FIG. 3 shows a detailed configuration of the sound source 22 of the waveform reading system. The sound source 22 is a sound source register 30 for storing the control signal from the CPU 10 and a sound source for storing the sound source waveform data. A waveform ROM 32, an address generating means 34 for generating a read address of the sound source waveform ROM 32, and a sound source waveform reading means I (Wave) for reading the sound source waveform data from the sound source waveform ROM 32 in accordance with the address generated by the address generating means 34.
Generator I: WGI 36 and sound source waveform reading means II (Wave Generator I).
I: WGII) 38, and WG2 which will be described later on / off the output of the sound source waveform data read from the WGII 38.
Switch 40 that switches based on the data written to ON / OFF (switch 40 is closed when ON is written to WG2 ON / OFF, WG2 ON / OFF
Switch 40 opens when OFF is written to OFF. ), An adding circuit 42 for weighting and adding two sound source waveform data read from the WGI 36 and the WGII 38, and an envelope generator I (Envelope) for generating an envelope waveform based on the parameter value output from the sound source register 30. Ge
Nerator I (EGI) 44 and Envelope Generator II (Envelope Generator)
attor II: EGII) 46 and sound source register 3
0 and the time-varying filter (Time Variant F = Time Variant F) that controls the frequency characteristic based on the parameter value output from the EGI 44.
ilter: TVF) 48, and a time-varying amplifier (Time Variant Amplifier) that controls the volume based on the parameter values output from the sound source register 30 and the EGII 46.
TVA) 50.

The parameters stored in the P1 register and the P2 register of the RAM 14 are set as shown below (see FIGS. 4A and 5).

1. Waveform ROM3 for sound source, such as Wave sawtooth wave, rectangular wave or waveform of natural musical instrument such as acoustic piano
2 shows various sound source waveforms stored in FIG.

2. TVF Cutoff Shows the cutoff frequency of the TVF 48.

3. TVF Resonance Shows the resonance strength of TVF48.

4. TVF ENV A Shows the attack time of the envelope waveform for frequency characteristic control.

5. TVF ENV D Shows the decay time of the envelope waveform for frequency characteristic control.

6. TVF ENV S Shows the sustain level of the envelope waveform for frequency characteristic control.

7. TVF ENVR Shows the release time of the envelope waveform for frequency characteristic control.

8. The volume level of the TVA Level TVA 50 is shown.

9. TVA ENV A Shows the attack time of the envelope waveform for volume control.

10. TVA ENV D Shows the decay time of the envelope waveform for volume control.

11. TVA ENV S Shows the sustain level of the envelope waveform for volume control.

12. TVA ENVR Shows the release time of the envelope waveform for volume control.

On the other hand, as shown in FIG.
The MODE register 4 stores the MODE of data indicating the fixed tone color mode or the intermediate tone color mode.

The sound source register 30 of the sound source 22 has a P1 register and a P2 register of the RAM 14 as described later.
Although the parameters stored in the register are stored, the parameters other than the parameters described above regarding the P1 register and the P2 register of the RAM 14 include the following parameters (see FIG. 6).

1. WG1 Wave Indicates the Wave stored in the P1 register.

2. WG2 Wave Indicates the Wave stored in the P2 register.

3. The pitch information output from the Pitch keyboard 16 is shown.

4. Indicates whether the WG2 ON / OFF switch 40 is turned on or off.

5. WG1 Level The weighting coefficient of the sound source waveform of P1 determined by the position of the slider 18u is shown.

6 WG2 Level The weighting coefficient of the sound source waveform of P2 determined by the position of the slider 18u is shown.

Although not shown, the address generation means 34, the EGI 44, and the EGII 46 are adapted to receive tone generation instruction data and tone generation stop instruction data from the CPU 10.

Next, the specific operation of the electronic musical instrument having the tone color control apparatus according to the present invention configured as described above will be described in detail.

First, the case where the mode switching operation is performed by operating the fixed tone color mode button 18q or the intermediate tone color mode button 18r will be described. When the fixed tone color mode button 18q is operated, the CP
U10 writes MODE indicating the fixed tone color mode in the MODE register set in the RAM 14.

On the other hand, when the intermediate tone color mode button 18r is operated, the CPU 10 writes MODE indicating the intermediate tone color mode in the MODE register set in the RAM 14.

Next, the setting of the timbres assigned to P1 and P2 will be described with reference to the flowchart shown in FIG. 7. The setting of the timbres of P1 and P2 is P
This is performed by selecting the tone color by operating the tone color buttons 18a to 18p after selecting P1 or P2 as a target to set the tone color with the 1 button 18s or the P2 button 18t.

As described above, the tone color buttons 18a-18
When the tone color is selected by p, the CPU 10 reads the parameter corresponding to the tone color selected by the tone color buttons 18a to 18p from the ROM 12, and stores the parameter value in the P1 register or the P2 register which stores the parameter set in the RAM 14.

That is, it is first determined which of the P1 button 18s and the P2 button 18t has been operated (step S702).

When the P1 button 18s is operated, the operated tone color buttons are read from the tone color buttons 18a to 18p (step S704), and the parameters corresponding to the read tone color buttons are read from the ROM 12 (step S706). , P1 register writes the parameter value (step S708).

On the other hand, when the P2 button 18r is operated, the operated tone color buttons are read from the tone color buttons 18a to 18p (step S710), and the parameters corresponding to the read tone color buttons are read from the ROM 12 (step S712). , P2 register writes the parameter value (step S714).

Further, the operation of the sound source 22 will be described. In the sound source 22, the parameter value stored in the sound source register 30 is periodically read at each sampling time, and the processing is performed according to the read parameter value. Done.

That is, the address generating means 34 is the CPU 1
W based on WG1 Wave and WG2 Wave and Pitch according to pronunciation instruction data from 0
The GI 36 and the WGII 38 generate the addresses of the sound source waveform ROM 32 to be read.

Then, WGI36 and WGII38
Reads the sound source waveform data from the sound source waveform ROM 32 in accordance with the address generated by the address generating means 34.

As described above, WGI 36 and WG
The sound source waveform data read from the sound source waveform ROM 32 by the II 38 is added to the WG by the adding circuit 42.
Weighted addition is performed based on 1 Level and WG2 Level.

On the other hand, the EGI 44 responds to the tone generation instruction data and the tone generation stop instruction data from the CPU 10 by the TVF
ENV A, TVF ENV D, TVF ENV
An envelope waveform for frequency characteristic control is generated based on S and TVF ENVR (see FIG. 5), and the generated envelope waveform for frequency characteristic control is added to the adding circuit 42.
TV to which sound source waveform data weighted and added in is input
Supply to F48.

The TVF 48 has an envelope waveform T, which is generated by the EGI 44, for controlling the frequency characteristic.
VF Cutoff Frequency and TV
The frequency characteristic of the input sound source waveform data is controlled based on FResonance.

Further, the EGII 46 displays the TV in response to the tone generation instruction data and the tone generation stop instruction data from the CPU 10.
A ENV A, TVA ENV D, TVA ENV
A volume control envelope waveform is generated based on S and TVA ENVR (see FIG. 5), and the generated volume control envelope waveform is input to the TVA 50 to which the sound source waveform data whose frequency characteristic is controlled by the TVF 48 is input. Supply.

The TVA 50 then outputs the envelope waveform and T for volume control generated by the EGII 46.
Based on the VA Level, the volume of the input sound source waveform data whose frequency characteristic is controlled is controlled and output to the sound system 24 as waveform data indicating a musical tone to be generated.

Next, referring to the flow chart shown in FIG. 8, the process of generating / stopping the musical tone waveform for the sound source 22 in response to the key press / release of the keyboard 16 by the CPU 10 will be described in detail. Therefore, P1 and P2 differ only in the value of TVF Cutoff Frequency as parameters other than the parameter designating the sound source waveform, and the other parameter values are the same.
Therefore, regarding the interpolation of parameters, TVF Cuto
Only ff Frequency will be described.

Further, WG1 Wave "Wa" is set in P1.
TVF Cutoff Frequency "Fa"
Set the tone A with the filter of, and set WG2 to P2.
TVF Cutoff Freq on Wave “Wb”
An operation example will be described in which the tone color B filtered with the "ubcy" Fb "is set and an intermediate tone of the intermediate tone colors of the tone colors A and B is obtained in the intermediate tone color mode.

Further, the slider 18u for indicating the position between P1 and P2 has a resolution of 101 steps, and when the position S of the slider 18u showing the degree of association between P1 and P2 is 0, Is a tone A, and when the position S of the slider 18u is 100, the tone B
Shall be pronounced.

In the process of the flowchart shown in FIG. 8, the CPU 10 determines whether or not the keyboard 16 is pressed, and repeats the determination until the keyboard 16 is pressed (step S802).

When the keyboard 16 is depressed,
In step S804, the CPU 10 reads MODE stored in the MODE register and determines whether the mode is the fixed tone color mode or the intermediate tone color mode.

In step S804, when the CPU 10 determines that the fixed tone color mode is set, the CPU 10 RA
The parameter of the P1 register set in M14 is read (step S806).

Then, the CPU 10 writes the parameters in the tone generator register 30 (step S808). That is, the pitch information by key depression determined in step S802 is written as Pitch, OFF is written as WG2 ON / OFF, and 100 is set as WG1 $ Level.
Is written, and 0 is written as WG2 Level.
In addition, Pitch, WG2 ON / OFF, WG1 L
The parameter value stored in the P1 register is written as a parameter other than the level and the WG2Level.

On the other hand, in step S804, the CPU
If it is determined that the CPU 10 is in the intermediate tone color mode, the CPU 10
Reads the parameters of the P1 register and P2 register set in the RAM 14 and compares them, and performs Wav between the P1 register and the P2 register in order to interpolate parameters other than the parameter that specifies the sound source waveform.
Parameters having different parameter values other than e are detected (step S810).

In the description of this operation example, P1
In the parameter values of the register and the P2 register, only the parameter value of TVF Cutoff differs, so that the CPU 10 detects TVF Cutoff.

Next, from the position S of the slider 18, interpolation values of parameters other than the parameters for designating the weighting amount of the sound source waveform and the sound source waveform are calculated (step S8).
12).

That is, the CPU 10 detects the position S of the slider 18u from the ADC 20, the CPU 10 calculates the weighting amount of the sound source waveform based on the position S, and WG1 L
(100−S) / 100 is obtained as the value of the level, and S / 100 is obtained as the value of the WG2 Level (see FIG. 9).

At the same time, the interpolated values of the parameters are calculated, and the TVF Cutoff Frequency is calculated.
Fa + (Fb−Fa) × S / 100 is obtained as the value of (see FIG. 10).

Then, the CPU 10 writes the parameters in the tone generator register 30 (step S814). That is, the pitch information by key depression determined in step S802 is written as Pitch, and ON is written as WG2 ON / OFF, and WG1

As Level, (100-S) / 100
Is written, S / 100 is written as WG2 Level, and Fa + (Fb−Fa) × S / 100 is written as TVF Cutoff Frequency. In addition, Pitch, WG2 ON / OFF, WG1 Le
vel, WG2 Level and TVF Cutof
Since the parameters other than f Frequency have the same parameter values in the P1 register and the P2 register, these Pitch, WG2 ON / OFF, WG
1 Level, WG2 Level and TVFC
For parameters other than utoff Frequency, the same parameter value is written.

When the parameter value is written in the tone generator register 30 as described above, the tone generation instruction data for instructing the sequential reading start of the tone source waveform in the order of the start address and the generation start of each envelope waveform is generated by the address generating means 34. , EGI44, and EGII46 are sounded (step S816), and then step S8.
Proceed to 18.

Therefore, in the fixed tone color mode, P1
In the intermediate tone color mode, the intermediate tone of the intermediate tone color of P1 and P2 corresponding to the position S of the slider 18u is generated.

Then, the sound source waveform of the intermediate sound generated in step S816 is weighted and added, and the parameters other than the parameters designating the sound source waveform are interpolated. Since they are performed respectively, it is possible to obtain an appropriate intermediate tone of P1 and P2, and to obtain a smooth tone color change of the intermediate tone colors.

In step S818, the CPU 10 determines whether or not the keyboard 16 has been released. If the keyboard 16 has not been released, the process returns to step S804 to repeat the processing. Therefore, in the intermediate tone mode, the keyboard 1
When the slider 18u is moved during the key depression of 6, the movement of the slider 18u can be reflected in the intermediate tone being sounded, and the degree of association between the sounding intermediate tones P1 and P2 can be changed to change the intermediate tone color. .

On the other hand, if the keyboard 16 is released,
The sound generation stop instruction data for instructing to release the envelope waveforms for frequency characteristic control and volume control is given to the EGI 44 and EGII 46 to perform sound generation stop processing (step S820), and thereafter, the processing returns to step S802 and is repeated.

Next, a second embodiment of the invention of the tone color control apparatus according to the present invention will be described with reference to FIG.

FIG. 11 is a block diagram corresponding to FIG. 3, showing another example of the configuration of the sound source. WGI, TVFI, T
A first tone generation sequence consisting of VAI, EGI and EGII, and WGII, TVFII, TVAII, EGIII
And a second tone generation sequence consisting of EGIV. Both TVFI and TVFII are TVF Cutoff Frequency in the sound source register.
y and TVF Resonance data are referenced, and for TVAI and TVAII, both refer to TVA Level data in the sound source register, and E
For both GI and EGIII, refer to the TVF ENV data in the sound source register for both EGII and EG
Both IV and TVA in the sound source register
The ENV data is referenced.

The switch, like the switch 40 shown in FIG. 3 described in the first embodiment of the present invention, is adapted to be opened and closed by the data indicating WG2 ON / OFF of the sound source register.

Here, when the fixed tone color mode is selected, each parameter written in the tone generator register is the same as that of the fixed tone color mode of the embodiment of the first invention, and the CPU 10 also has the same function as that of the first invention. The same operation as in the fixed tone color mode of the embodiment is performed. When there is a key press, the first
A tone signal is generated from the tone generation sequence and the second tone generation sequence, respectively.
Since OFF is written in OFF, no tone signal is output from the second tone generation sequence to the sound system 24, and only the tone signal of the first tone sequence is output to the sound system 24.

On the other hand, when the intermediate tone color mode is selected, the CPU 10 performs the same operation as that of the first embodiment of the invention. At this time, WG2 ON of the sound source register
Since ON is written in / OFF, the tone signal generated by the first tone generation sequence and the second tone generation sequence is output to the sound system 24, and the slider 18
An intermediate tone color is generated according to the position of u.

As described above, if there are two tone generation sequences, the second embodiment of the invention will be described below using the first tone generation sequence and the second tone generation sequence. Can be transformed as follows.

Modified Example 1 A mode in which the musical tones assigned to P1 and the musical tones assigned to P2 are output from the first tone generation sequence and the second tone generation sequence, respectively, and mixed and output. It may be provided.

In this case, the inside of the sound source register is
It is divided into a first tone generator register area for storing parameters required for the first tone generation sequence and a second tone generator register area for storing parameters required for the second tone generation sequence, and P
The parameter for 1 is stored in the first sound source register area, and the parameter for P2 is stored in the second sound source register area. Therefore, in the first tone generation sequence and the second tone generation sequence, each device (WG, TVF, TV
The values of the parameters supplied to A) are different. In this mode, ON is written in WG2 ON / OFF,
The switch in FIG. 11 is closed.

When the key is depressed, the CPU does not interpolate the parameters but gives a musical tone generation instruction to the first musical tone generation sequence based on the parameters stored in the first tone generator register area, and A tone generation instruction is given to the second tone generation sequence based on the parameters stored in the two tone generator register area, and the tone signals output from each tone generation sequence are added at a predetermined level by an adder circuit.

In case of having such a mode, as shown in FIG.
In addition to the fixed tone color mode button 18q and the intermediate tone color mode button 18r shown in (4), an operator for switching to the above-mentioned mode may be provided.

When the intermediate tone color mode is set in this modification 1, the parameter value written in the tone generator register in the first embodiment of the invention is stored in both the first tone generator register area and the second tone generator register area. Try to write. The first tone generation sequence refers to the first tone generator register area, and the second tone generation sequence refers to the second tone generator register area, but the same parameter value is written in the first tone generator register area and the second tone generator register area. Therefore, the same effect as that of the embodiment of the first invention is obtained.

Further, when the fixed tone color mode is set in the first modification, as in the first embodiment of the invention,
Since OFF is written in WG2 ON / OFF and the switch shown in FIG. 11 is open, only the tone signal generated in the first tone generation sequence is output to the sound system 24.

Therefore, according to the first modification, one key is sounded in a state in which two timbres are mixed, or two key colors are selected according to the degree of relevance as in the first embodiment of the invention.
It is possible to interpolate the parameters of one tone and generate a tone in which the output value is weighted, or to generate only one tone color.

Modification 2 It is also possible to provide a mode for simultaneously generating musical tones having the same tone color but different pitches for one key depression.

In this case, in place of Pitch in the first embodiment of the present invention, the pitch of the musical tone generated in the first musical tone generation sequence is written in the sound source register Pithc.
1 and Pithc2 in which the pitch of the musical tone generated in the second musical tone generation sequence is written are stored.

Also in this mode, WG2 is turned on.
ON is written in / OFF, and the switch in FIG. 11 is closed.

When the key is pressed, the CPU writes parameters other than the parameters relating to the pitch information in the tone generator register as in the first embodiment of the present invention, and sets the parameter value relating to the pressed pitch as Pitch1. , And a parameter value deviated from the parameter value written in Pitch1 by a predetermined value is written in Pitch2.

For this reason, a tone signal having a depressed key pitch is generated from the first tone generation sequence, and a tone signal having a tone pitch deviated from the key tone pitch by a predetermined tone is generated from the second tone generation sequence. Is generated.

For example, a tone having a thick tone color is generated by generating a tone having a pitch one octave below the tone pitch of the musical tone designated to be pronounced or one octave above the tone pitch of the tone designated to be pronounced. The chorus effect can be produced by simultaneously producing musical tones that are several cents higher than the pitch of the musical tone instructed to be pronounced or several cents lower than the tone pitch of the musical tone to be pronounced instructed. it can.

Also in the case of this modification 2, similarly to the modification 1 described above, an operator for switching to this mode may be provided.

In the second modification, when the intermediate tone color mode is set, the pitches of the depressed keys are set to Pitch1 and Pitch.
2 and the other operations are the same as those in the case of the intermediate tone color mode in the embodiment of the first invention.

In the second modification, when the fixed tone color mode is set, OFF is written in WG2 ON / OFF and the switch in FIG. 11 is turned on, as in the case of the first embodiment of the invention. Since it is opened, only the tone signal generated in the first tone generation sequence is output to the sound system.

Therefore, according to the second modification, musical tones having the same tone color but different pitches are simultaneously generated for one key depression, or according to the degree of association as in the first embodiment of the present invention. It is possible to interpolate the parameters of two musical tones, generate musical tones with weighted output values, or generate only one timbre.

Modified Example 3 It is possible to provide a mode in which musical tones of different pitches can be generated for a plurality of key depressions.

In this case, as in the case of the modification 1,
The tone generator register has a first tone generator register area for storing parameters necessary for the first tone generation sequence and a second tone generator register area for storing parameters required for the second tone generation sequence.

Also in this mode, WG2 is turned on.
ON is written in / OFF, and the switch in FIG. 11 is closed.

When the first key is pressed, the first key is pressed.
If the first tone signal is generated from the first tone generation sequence by referring to the tone generator register area and the second key is pressed before the first tone is completely attenuated, refer to the second tone generator register area. Then, a second tone signal is generated from the second tone generation sequence.

Also in the case of the third modification, similarly to the first modification described above, an operator for switching to this mode may be provided.

In the third modification, when the intermediate tone color mode is set, the same value is written in both the first sound source register area and the second sound source register area as in the case of the first modification, and the operation is performed. This is exactly the same as the case of the first modification.

Also, in the third modification, the same operation as in the first modification is performed when the fixed tone color mode is set.

Therefore, according to the third modification, two musical tones having different pitches are simultaneously generated for a plurality of key depressions, or two musical tones are generated according to the degree of association as in the first embodiment of the invention.
It is possible to interpolate the parameters of one tone and generate a tone in which the output value is weighted, or to generate only one tone color.

Modified Example 4 It is possible to provide a mode in which a tone of the first part and a tone of the second part are respectively generated by two tone generation sequences. The part here means a part such as a melody part or an accompaniment part.

Also in this mode, WG2 is turned on.
ON is written in / OFF, and the switch in FIG. 11 is closed.

The modification 4 also includes a sound source register similar to that of the modification 1, and
The tone signal of the part is generated from the first tone generation sequence with reference to the first tone generator register area, and the tone signal of the second part is generated from the second tone generation sequence with reference to the second tone register area. A predetermined weighting addition is performed on the part and the result is output to the sound system.

Also in the case of the modified example 4, as in the modified example 1 described above, an operator for switching to this mode may be provided.

Further, in the fourth modification, if a part for generating a musical tone is defined by the pitch information, it can be used as a keyboard split, and a part for generating a musical tone by the velocity of key depression is defined. It can be used as a velocity split.

In the fourth modification, when the intermediate tone color mode is set, the same value is written in both the first sound source register area and the second sound source register area as in the case of the modification example 1, and the operation is performed. Is the same as that of the first modification.

In the modified example 4, the same operation as in the modified example 1 is performed even when the fixed tone color mode is set.

Therefore, according to this modification 4, the musical tones of two parts are sounded at the same time, or the parameters of the two musical tones are interpolated and output according to the degree of association as in the first embodiment of the invention. It is possible to generate a tone with weighted values or to generate only one tone color.

In the above-described embodiments and modifications of the invention, the timbre is not only the timbre specified by the name of the natural musical instrument such as a piano or a guitar, but also the timbre that is played strongly and the guitar is played weakly. Of course, it is possible to use any timbre, such as a timbre that is caused by a difference in playing method of a natural musical instrument, such as a timbre.

The above-described embodiments and modifications of the invention may be further modified as shown below.

(1) In the above-described embodiments and modifications of the present invention, the weighted amount of the sound source waveform and the interpolated values of parameters other than the parameters for designating the sound source waveform are obtained by calculation. Create a table that stores the interpolated values of parameters other than the parameters that specify the sound source waveform, and by referring to this table, find the weighted amount of the sound source waveform and the interpolated values of the parameters other than the parameters that specify the sound source waveform. Good.

As described above, when the interpolated values of the parameters other than the parameters for designating the weighting of the sound source waveform and the sound source waveform are obtained by referring to the table, the interpolated values of the parameters other than the parameters for designating the weighting amount of the sound source waveform and the sound source waveform are obtained. Since the calculation process for obtaining the can be omitted, the processing time of the process in the sound source 22 can be shortened.

When the interpolated values of the parameters other than the parameters designating the sound source waveform are obtained by referring to the table, it is easy to obtain the interpolated values of the parameters other than the parameter designating the sound source waveform by curve interpolation. Become.

(2) In the above-described embodiments and modifications of the invention, even if the slider 18u is operated during the tone generation stop process in the intermediate tone color mode, the operation is changed to the intermediate tone color of the intermediate tone. Although it cannot be reflected, even when the slider 18u is operated during the sound generation stop process, the operation may be reflected on the change of the intermediate tone color of the intermediate tone.

(3) Even when the sound source has a structure that can be controlled by a value of a certain parameter and a relative value (relative parameter) to the parameter, the same parameter interpolation as in the above-described embodiment and modification of the invention is performed. be able to. In the following, the relative parameter will be referred to as the offset parameter.

In this case, an area for storing offset parameters is provided in the tone generator register.

When the offset parameter is used in the configuration of the first embodiment of the invention, TVF Cut
Off frequency will be described as an example.

First, in the sound source register, Cutof
f CF for writing parameters of Frequency
And the offset of Cutoff Frequency
An OFCF for writing parameters is provided. The value obtained by adding the CF value and the OFCF value is the Cut of the TVF.
It will be supplied as off frequency.

TVF Cutoff Frequency
To control y by the offset parameter, the Cutoff Frequence of P1 only is added to the CF of the sound source register.
Write the value of ncy and write P1 and P2 to OFCF.
Write the value that changes within the difference value of Cutoff Frequency of and linearly interpolated by the position S of the slider 18u.

Specifically, Fa is written in CF and O
A value given by (Fb−Fa) × S / 100 is written in FCF. Add the value of CF and the value of OFCF to TV
As a result, the same value as the interpolated parameter of the first embodiment of the invention is eventually supplied to TVF.
To be supplied.

Therefore, when the slider 18u is set to the P1 side, a tone color due to P1's Cutoff Frequency is generated, and when it is set to the P2 side, P2's Cutoff Frequency is generated.
If a tone color due to a frequency is generated and there is a slider 18u between P1 and P2, a tone color due to an intermediate Cutoff Frequency is generated according to the position, so that the same effect as that of the first embodiment of the invention is obtained. Is played.

TVF Cutoff Freq described above
The uency example is merely one example, and it goes without saying that any other parameter can be controlled by the offset parameter.

In addition, the above-mentioned TVF Cutoff F
In the example of the request, the method of adding the offset parameter is used, but it is not limited to this operation method in particular, and it goes without saying that the same effect can be obtained by using the multiplication.

Next, the case of using an offset parameter in the configuration of the second embodiment of the invention will be described. The configuration of the tone generator register is the same when the above-mentioned offset parameter is applied to the embodiment of the first invention. As described in the embodiment of the second invention, each device (WG, TVF, TVA) of the first tone generation sequence and the second tone generation sequence respectively refers to this sound source register. Then, a tone signal is generated by each tone generation sequence.

(4) In (3) above, the difference value between the parameters of P1 and P2 is used as the offset parameter. However, in the configuration of the second embodiment of the invention,
When the operator can set arbitrary offset parameters for P1 and P2 in advance, the offset parameter values set for P1 and P2 are interpolated according to the position of the slider 18u, and interpolation is performed. It is also possible to control the musical tones by supplying these values as offset parameters for each musical tone generation sequence.

In such a case, set the slider 18u to P
When the slider 18u is set to the P1 side, a tone color tone is generated according to each parameter set to P1 and its offset parameter. When the slider 18u is set to the P2 side, each parameter set to P2 and its offset parameter are generated. A musical tone is generated and the slider 18u moves to P1.
And P2, an intermediate tone color corresponding to the position is generated, so that the same effect as that of the embodiment of the first invention and the embodiment of the second invention is obtained.

(5) In the embodiment of the invention described above, the degree of association between two timbres when designating an intermediate timbre is indicated by the position S of the slider 18u. Control may be performed according to the level of the waveform whose level changes.

When the degree of relevance is controlled by the envelope waveform, the degree of relevance can be changed by the time change from the key depression.

Further, when the degree of relevance is controlled by the waveform as described above, the output value when operating the manipulator capable of continuously changing the output value is stored as the waveform, and the waveform is stored. The degree of association may be controlled by reading.

Further, in this case, the waveform of the output value stored by the operation of the operator whose output value can be continuously changed is not the operation of the operator but the other specific value including the keyboard. It may be read when the operator is operated.

Alternatively, these waveforms may be assigned to a specific key or key range, and when the key of the key or key range is depressed, the assigned waveform is output, and the degree of association may be controlled accordingly.

(6) In the above-described embodiment of the invention, the degree of association between the timbres is specified by the slider 18u. However, the invention is not limited to this. The degree of association may be designated.

Further, instead of designating the degree of association between timbres by operating an operator other than the keyboard as described above, the degree of association between timbres may be designated by the operating state of the keyboard. Good.

That is, the degree of association between the timbres may be designated according to the velocity or after-touch value when the keyboard is operated.

Further, the pitch information indicating the position of the depressed key may be used to specify the degree of association between the timbres. At that time, the degree of association between the timbres may be specified based on the pitch information of the currently pressed key, or the pitch information of the previous key depression and the pitch of the current key depression may be specified. Based on the difference with the information
The degree of association between the timbres may be designated.

When the degree of association between tone colors is designated by the pitch information as described above, the degree of association between tone colors may be updated at any time during the performance, or may be preset.

Further, when the degree of relevance between tone colors is designated by the pitch information, the upper and lower sides of the tone colors to be positioned on the keyboard may be determined based on the optimum tone range of the two tone colors. For example, when obtaining an intermediate tone between the two tones of the bass and the soprano recorder, when a key with a low pitch is pressed, an intermediate tone close to the tone of the bass is produced, When a key with a high pitch is pressed, an intermediate tone close to the tone of the soprano recorder is produced.

(7) In the embodiment of the invention described above, the degree of association between timbres is specified by the slider 18u, but the invention is not limited to this. For example, the time interval when two timbres are specified. The degree of association between the timbres may be designated according to.

Here, assuming that the above-mentioned time interval is the operation time of the tone color button, for example, when obtaining an intermediate tone between the two tone colors of the bass and the soprano recorder, the tone color button for designating the tone color of the bass is specified. When is operated for a longer time than the tone button that specifies the tone of the soprano recorder, an intermediate tone close to the tone of the bass is produced,
When the tone button for specifying the tone of the soprano recorder is operated for a longer time than the tone button for specifying the tone of the bass, an intermediate tone close to the tone of the soprano recorder may be produced.

When the tone color is designated by the MIDI data, the measuring means is provided with a receiving means for receiving the MIDI data for designating the tone color and a measuring means for measuring the receiving interval of the receiving means. Of the M received by the receiving means based on the measurement result of the reception interval of
You may make it control the degree of association of the several tone colors designated by IDI data.

(8) In the above-described embodiment of the invention, mode switching between the fixed tone color mode and the intermediate tone color mode is performed by providing respective mode buttons. The switching may be performed, or the switching may be performed by after-touch with a damper pedal or key depression.

The mode may be switched by MIDI data input from the outside.

Further, the mode may be switched depending on the operation method of the operator. In that case, for example, the tone color of P2 is designated while operating the tone color button for designating the tone color of P1. When the tone color button of is operated, the fixed tone color mode is switched to the intermediate tone color mode.

(9) In the embodiment of the invention described above, the two timbres from which the intermediate tone is obtained can be arbitrarily selected, but the two timbres from which the intermediate tone is obtained are preset. You may keep it. For example, when a piano tone color is selected as the P1 tone color, a harpsichord tone color is automatically selected as the P2 tone color.

(10) In the above-described embodiment of the invention, the case of obtaining an intermediate tone between two timbres has been described. However, as an operator for designating the intermediate tone, a slider having two or more dimensions is used instead of a slider. An operator such as a joy stick capable of specifying data may be used to obtain intermediate tones for a plurality of three or more tones according to the position of the operator.

[0160]

Since the present invention is configured as described above, it has the following excellent effects.

In obtaining an intermediate tone from a plurality of types of musical tones, a waveform level weighting control is performed on a sound source waveform generated based on a parameter designating a non-interpolable sound source waveform among parameters of the plurality of types of musical tones. Interpolable parameters other than those that specify non-interpolable sound source waveforms such as filter cutoff frequency that can continuously change the value among multiple types of musical sound parameters Since each of the plurality of musical tones is interpolated and controlled, appropriate processing is performed on the sound source waveform and parameters other than the parameters that specify the sound source waveform. It becomes possible to obtain intermediate tones of various intermediate tones, and There it is possible to obtain a change in the smooth timbre.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic musical instrument including a tone color control device according to the present invention.

FIG. 2 is a schematic configuration diagram of an operation panel.

FIG. 3 is a block configuration diagram showing a detailed configuration of a sound source.

FIG. 4A is a diagram schematically showing the configuration and parameters of a P1 register and a P2 register set in a RAM, and FIG. 4B is a diagram showing the configuration and parameters of a MODE register set in a RAM. .

FIG. 5 is an explanatory diagram showing an envelope waveform.

FIG. 6 is a diagram showing a configuration and parameters of a sound source register and a supply destination of parameters stored in the sound source register.

FIG. 7 is a flowchart showing a process of setting a tone color assigned to P1 and P2.

FIG. 8 is a flowchart showing a process relating to generation / stop of a musical tone waveform in a sound source by pressing / releasing a keyboard.

FIG. 9 is a graph for explaining a calculation process of a weighting amount of a sound source waveform among parameters.

FIG. 10 is a graph for explaining a calculation process of an interpolated value of a parameter other than a parameter that specifies a sound source waveform.

FIG. 11 is a block configuration diagram corresponding to FIG. 3, showing another configuration example of the sound source.

[Explanation of symbols]

 10 CPU 12 ROM 14 RAM 16 keyboard 18 operator group 20 ADC 22 sound source 24 sound system 30 sound source register 32 sound source waveform ROM 34 address generating means 36 WGI 38 WGII 40 switch 42 adding circuit 44 EGI 46 EGII 48 TVF 50 TVA

Claims (3)

[Claims] 1. A musical tone of a tone color having a predetermined degree of association with a plurality of musical tones whose tone colors are determined by a tone waveform and a parameter other than a parameter designating the tone waveform. In the timbre control device that obtains, a designating unit that designates the degree of association, a weighting unit that weights and mixes sound source waveforms of the plurality of musical tones according to the degree of association designated by the designating unit, and a sound source of the plurality of musical tones. Interpolation means for interpolating parameters other than the waveform designating parameter according to the degree of association designated by the designating means, and the weighting means for controlling the weighted and mixed sound source waveform based on the interpolated parameter. Accordingly, a tone signal generating means for generating a tone signal of a tone color having a predetermined degree of association with the tone colors of the plurality of tones is provided. Tone color control apparatus according to symptoms. 2. A musical tone of a tone color having a predetermined degree of association with a plurality of musical tones whose tone colors are determined by a sound source waveform and a parameter other than a parameter designating the sound source waveform. In the tone color control device for obtaining, a specifying unit that specifies the degree of association, an interpolating unit that interpolates parameters other than the parameters that specify the sound source waveforms of a plurality of musical tones according to the degree of association specified by the specifying unit, A tone signal of a tone color having a predetermined degree of association with the tone colors of the plurality of tones by controlling the tone generator waveforms of the plurality of tones based on the interpolated parameters and weighting and mixing the controlled tone generator waveforms. And a tone signal generating means for generating the tone color control device. 3. A plurality of tone colors are determined by a sound source waveform, a parameter other than the parameter designating the sound source waveform, and a relative parameter for arbitrarily increasing / decreasing a parameter other than the parameter designating the sound source waveform with a relative value. In the tone color control device for obtaining the tone of the tone color having a predetermined degree of association with the tone colors of the plurality of tones, a designating unit that designates the degree of association and the relative parameter are specified by the designating unit. Interpolating means for interpolating according to the specified degree of association, and controlling the sound source waveforms of a plurality of musical tones respectively based on the interpolated relative parameters, by weighting mixing each controlled sound source waveform, the plurality of A tone color control apparatus, comprising: a tone color signal generating means for generating a tone color tone signal having a predetermined degree of association with a tone color of a tone.