JP2526527B2 - Compound sound electronic musical instrument - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tone electronic musical instrument capable of subtly changing and controlling musical tone characteristics such as pitch, tone color and volume during a performance, and particularly to a specific one or a plurality of tones generated simultaneously. The new performance method is made possible by controlling the tone characteristics of the sound.

[0002]

2. Description of the Related Art Conventionally, the pitch (pitch) of a musical tone generated by operating a pitch bend operator while playing an electronic musical instrument.
It is known that the pitch bend effect can be obtained by subtly changing (see, for example, Japanese Patent Publication No. 58-48914 and Japanese Patent Publication No. 56-74298). These known pitch bend imparting means are mainly intended for single-tone electronic musical instruments, but are also applicable to multi-tone electronic musical instruments.

By the way, a so-called polyphonic synthesizer is known as a multi-tone electronic musical instrument which can obtain a pitch bend effect. In this synthesizer, when a pitch bend operator is operated, a sound is produced according to the operation amount. The pitches of all sounds are uniformly controlled to be changed.

[0004]

According to the polyphonic synthesizer described above, for example, only a certain string is choked, as seen in playing an electric guitar,
It was impossible to play the other strings without choking. Here, choking is a technique of changing the pitch by pushing up the string being pressed or pulling it downward after picking, which is also called bending.

An object of the present invention is to allow manual control of musical tone characteristics such as pitch, tone color, and volume of specific one or more sounds among a plurality of sounds that are simultaneously generated, thereby improving the degree of freedom in performance expression. It is to provide a new multi-tone electronic musical instrument.

[0006]

A first multi-tone electronic musical instrument according to the present invention is a pitch designating means for designating a pitch of a musical tone to be generated and capable of designating a plurality of pitches at the same time. 10 of FIG. 2] and a tone generating means having a plurality of channels, each channel generating a tone signal corresponding to the tone assigned to the channel [2 of FIG. 2]
4 to 28], assigning means [12 and 14 in FIG. 2] for assigning a musical tone corresponding to the pitch designated by the pitch designating means to any of the plurality of channels, and Control information generating means [22 in FIG. 2] having an operating means capable of continuous operation by a player, and generating control information for controlling musical tone characteristics that continuously changes in accordance with the operating state of the operating means. ], A channel detecting means [30, 32 in FIG. 2] for detecting a channel to which a musical sound of a predetermined key touch state is assigned as a specific sound channel among the plurality of channels, and the channel detecting means detected as the specific sound channel. A tone control means [16, 20 in FIG. 2] for controlling the tone characteristics of a tone signal according to the control information from the control information generating means is provided only in the channel.

The second polyphonic electronic musical instrument according to the present invention is a pitch designating means for designating the pitch of a musical tone to be generated, and is capable of simultaneously designating a plurality of pitches [1 in FIG. 5].
0] and a tone generating means having a plurality of channels, each channel generating a tone signal corresponding to the tone assigned to the channel [24 to 28 in FIG. 5].
And assigning means [12 and 14 in FIG. 5] for assigning a musical tone corresponding to the pitch designated by the pitch designating means to any of the plurality of channels, and a continuation by the performer during the generation of the musical tone accompanying the performance. Has operation means that can be operated
Control information generating means [22 in FIG. 5] for generating control information for controlling musical tone characteristics that continuously changes following the operating state of the operating means, and a plurality of predetermined tones to be simultaneously generated. Selection means [42 in FIG. 5] for selecting any one of the detection conditions of the types
Channel detecting means [30, 40 in FIG. 5] for detecting, as a specific sound channel, a channel to which a musical sound satisfying the detection condition selected by the selecting means is assigned, among the plurality of channels. Only the channel detected as a channel is provided with a tone control means [16, 20 in FIG. 5] for controlling the tone characteristic of the tone signal according to the control information from the control information generating means.

[0008]

According to the above-described first multi-tone electronic musical instrument, the channel to which the musical sound of the predetermined key touch state (the predetermined initial touch state or the predetermined after-touch state) is assigned is detected as the specific sound channel, Since the tone characteristic of the tone signal is controlled according to the control information from the control information generating means only in this specific tone channel, for example, when a plurality of keys are simultaneously pressed on the keyboard to operate the pitch bend operator, It is possible to apply the pitch bend effect only to the sound having the strongest key touch among the plurality of sounds corresponding to the keys.

Further, according to the above-described second polyphonic electronic musical instrument, a channel to which any one kind of detection condition among a plurality of kinds of detection conditions is selected and a musical tone which satisfies the selected detection condition is assigned. Is detected as a specific sound channel, and the musical tone characteristics of the musical sound signal are controlled only in the specific sound channel in accordance with the control information from the control information generating means. When the lowest tone condition is selected, the pitch bend effect is added only to the lowest tone when the lowest tone condition is selected, and when the highest tone condition is selected With, the pitch bend effect is applied only to the highest note, and when the condition of the strongest touch sound is selected, the pitch bend effect can be applied only to the strongest touch sound among a plurality of key depression sounds.

[0010]

1 shows a multi-tone electronic musical instrument for explaining an embodiment of the present invention. This electronic musical instrument is capable of simultaneously producing a plurality of musical tones by a time-divisional musical tone signal forming process. ing.

The keyboard circuit 10 includes a keyboard having a large number of keys and a large number of key switches which are respectively driven by the plurality of keys of the keyboard.

The key assigner 12 is for detecting a depressed key by sequentially and repeatedly scanning a large number of key switches in the keyboard circuit 10. When the depressed key is detected, the key associated with that key is depressed. The key information is assigned to a specific channel among a plurality of (e.g., eight) time division channels much smaller than the number of keys. As the key depression information, a key code signal KC determined for each key to identify the depressed key and a key-on signal KON indicating that a key is depressed.
Are used, and the key code signal KC and the key-on signal KON relating to a certain key depression are simultaneously sent from the key assigner 12 at the timing of the assigned specific channel. Further, when a plurality of keys equal to or less than the number of channels are pressed, the key code signal KC and the key-on signal KON for the plurality of keys are sent from the key assigner 12 in a time division manner.

The frequency number memory 14 stores frequency number data determined for each key of the keyboard (each sound to be generated), and each time the key code signal KC is received, the frequency number data corresponding thereto is stored. F is the multiplier 16
To be supplied.

The lowest tone detection circuit 18 is for detecting the key with the lowest pitch among a plurality of keys pressed, and the channel whose key-on signal KON is "1" (the channel with key depression). Of these, the channel whose value of the key code signal KC is the lowest (smallest) is detected,
Output signal "1" at the timing of the detected channel
Is supplied to the selector 20 as the selection control signal S. When one key is pressed, the one key is treated as the lowest note key.

In the selector 20, the selection control signal S is "1".
If so, the input A is selected, and if the selection control signal S is "0", the input B is selected. The pitch bend data PD from the pitch bend operation circuit 22 is supplied as the input A, and the numeric value "1" is supplied as the input B. Is supplied.

The pitch bend operating circuit 22 is, for example, a voltage dividing circuit having a variable resistor whose resistance value is changed by the operation of the pitch bend operating element, and a voltage output corresponding to the resistance change from the voltage dividing circuit is converted into a digital signal. An A / D conversion circuit for conversion is provided, and the digital output of this A / D conversion circuit is sent out as pitch bend data PD. As the pitch bend operation circuit 22, various configurations can be adopted, for example, a type in which the variable width of the pitch bend can be arbitrarily set (one example of which is disclosed in the above-mentioned JP-A-56-74298). Shown) may be employed.

In the multiplier 16, the frequency number data F from the frequency number memory 14 and the output data of the selector 20 are multiplied. Since the selector 20 selectively transmits the pitch bend data PD from the pitch bend operation circuit 22 at the timing of the channel in which the lowest tone key is detected, and selectively transmits the data showing the numerical value "1" at the timing of the other channels, the lowest tone is selected. Only the frequency number data F corresponding to the key is multiplied by the pitch bend data PD, and the other frequency number data F is multiplied by "1". As a result, the value of the frequency number data F'corresponding to the lowest note key output from the multiplier 16 changes with time in accordance with the pitch bend data PD, and the values of the other frequency number data F'are nothing. It will not change.

The frequency number data F'output from the multiplier 16 is supplied to the accumulator 24 and accumulated for each channel. This accumulating operation is carried out cyclically so as to repeat similar accumulation from the beginning when the frequency number data F'is accumulated and reaches a predetermined maximum value. Therefore, the length of one cycle of accumulation depends on the value of the frequency number data F ′. In this case, since the frequency number data is set to have a larger value as the pitch becomes higher, the length of one cycle of accumulation becomes shorter as the pitch becomes higher, so that the repetition frequency of accumulation becomes higher as the pitch becomes higher. .

In the accumulated data qF 'sent from the accumulator 24, the number of times of accumulation is q, and the accumulator 24
If the modulo (modulus) of is N, then “(q × F ′) mod
“UloN”, and the numerical value increases by F ′ each time the number of times of accumulation increases.

The tone generator 26 includes, for example, a waveform memory which stores waveform sample value data for one cycle of the tone waveform, and the accumulated data q is stored in the waveform memory.
The musical tone waveform sample value data is read in a time-division manner according to F '. In this case, the reading of the musical tone waveform sample value data is performed at a speed corresponding to the above-described cumulative repetition frequency, so that the musical tone waveform sample value data sequentially sent from the waveform memory for each channel is for each channel. The pitch (frequency) corresponding to the key assigned to that channel is indicated.

The musical tone waveform sample value data of each channel, which is sent from the waveform memory in a time division manner, is multiplied by amplitude envelope data showing a predetermined envelope rising in synchronization with the key-on signal KON for each channel. To be done. The tone waveform sample value data of each channel obtained as a result of this multiplication is supplied to the sound system 28 as a digital tone signal.

The digital tone signals of the respective channels supplied to the sound system 28 are added and synthesized and then D /
It is sounded as a musical sound from a speaker through an A converter, a power amplifier, and the like.

According to the multi-tone electronic musical instrument having the above-described structure, when a plurality of keys are pressed on the keyboard to operate the pitch bend operator, the pitch bend is imparted only to the lowest note among the plurality of sounds corresponding to the plurality of pressed keys. You can For example, when two tones are generated, the pitch of only the low-pitched sound is changed and finally the same pitch as that of the high-pitched sound,
It can be delicately shifted.

In the above-mentioned multi-tone electronic musical instrument, the pitch bend is given to the lowest note, but the present invention is not limited to this. For example, the highest note, the note other than the lowest note, the note other than the highest note, the highest note and the lowest note. A pitch bend may be added to a sound other than the sound (for example, an intermediate sound). Further, the tone signal formation of each channel may be performed in parallel instead of time division. Further, the tone signal generation method may be another method such as an arithmetic method or a frequency modulation method instead of the waveform memory reading method.

FIG. 2 shows a multi-tone electronic musical instrument according to the first embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals and their detailed description will be omitted.

The feature of the first embodiment is that a key touch on the keyboard is detected and a pitch bend is added to the sound having the strongest key touch.

The touch detection circuit 30 is for detecting an initial touch for each key of the keyboard, and the key code signal KC output from the key assigner 12 is touch data corresponding to the strength of the initial touch of each pressed key. According to the above, it is time-divided and supplied to the strongest touch detection circuit 32.

The strongest touch detection circuit 32 is for detecting the key having the strongest initial touch among a plurality of keys pressed, and the touch data value of the channel whose key-on signal KON is "1". Is detected, and the output signal "1" is supplied to the selector 20 as the selection control signal S at the timing of the detected channel. If one key is pressed, the one key is treated as the strongest touch key.

With such a configuration, when a plurality of keys are pressed on the keyboard to operate the pitch bend operator, the pitch bend is applied only to the sound having the strongest initial touch among the plurality of sounds corresponding to the pressed keys. be able to.

In the first embodiment described above, the pitch bend is applied to the strongest initial touch sound, but aftertouch is detected and the pitch bend is applied to the strongest aftertouch sound. May be.

FIG. 3 shows a multi-tone electronic musical instrument for explaining an embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted.

The characteristic of the electronic musical instrument shown in FIG. 3 is that the specific key range of the keyboard is detected and the pitch bend is applied only to the sounds belonging to the specific key range.

The specific key range detection circuit 34 includes a key code signal K which is a combination of an octave code and a note code.
Octave code signal OC out of C and key-on signal K
It is for detecting a key belonging to a specific octave based on ON, and compares the octave code signal OC and a predetermined specific octave code with respect to a channel whose key-on signal KON is "1", and both are matched. A channel is detected, and the output signal "1" is supplied to the selector 20 as the selection control signal S at the timing of the detected channel.

With such a configuration, when a key belonging to a specific octave and a key belonging to another octave are simultaneously pressed on the keyboard to operate the pitch bend operator, only the sound corresponding to the key belonging to the particular octave is operated. Pitch bend is added. When a plurality of keys belonging to a specific octave are pressed to operate the pitch bend operator, pitch bends are added to a plurality of notes corresponding to the plurality of keys.

The specific key range detection circuit 34 may detect the keys belonging to the specific key range by inputting the key code signal KC instead of the octave code signal OC.

FIG. 4 shows a multi-tone electronic musical instrument for explaining an embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted.

The characteristic of the electronic musical instrument of FIG. 4 is that a sound of maximum volume is detected and a pitch bend is added only to the sound.

The envelope generator (EG) 36 provided in the tone generator 26 receives the key-on signal KON of each channel and determines the amplitude envelope data E for determining the amplitude envelope characteristic of the digital tone signal.
V is generated in a time division manner, and this data EV is supplied to the maximum value detection circuit 38 while being multiplied by the musical tone waveform sample value data read from the waveform memory as described above.

The maximum value detection circuit 38 is for detecting the loudest sound among a plurality of sounds simultaneously generated, and the amplitude envelope data EV among the channels for which the key-on signal KON is "1". Is detected, and the output signal "1" is supplied to the selector 20 as the selection control signal S at the timing of the detected channel.

According to this structure, when a plurality of keys are pressed on the keyboard to operate the pitch bend operator, the pitch bend is applied only to the loudest sound among the plurality of sounds corresponding to the pressed keys. .

FIG. 5 shows a multi-tone electronic musical instrument according to a second embodiment of the present invention. The same parts as those in FIGS. 1, 2 and 4 are designated by the same reference numerals for detailed description. Omit it.

A feature of the second embodiment is that any one of various pitch bend imparting modes can be selected when a plurality of sounds are simultaneously generated.

The pitch bend imparting control circuit 40 is enabled in response to ON signals of the first to sixth mode selecting switches S _{1 to} S _{6 in} the mode selecting switch (SW) circuit 42. The control circuits of the above six control circuits are different from each other in the pitch bend imparting mode.

That is, the first control circuit is for imparting a pitch bend to all the sounds generated at the same time. When the circuit is enabled, the output signal "1" is selected at the timing of all the channels. 20 is supplied as a selection control signal S. Therefore, when the first mode selection switch S ₁ is turned on, the pitch bend can be applied to each of a plurality of notes corresponding to a plurality of keys pressed on the keyboard.

The second control circuit is for imparting a pitch bend to the sound with the strongest key touch among a plurality of sounds generated simultaneously, and is functionally similar to the strongest touch detection circuit 32 in FIG. Is. Therefore, when the second mode selection switch S ₂ is turned on, the pitch bend can be applied only to the sound with the strongest key touch among the plurality of sounds corresponding to the plurality of keys pressed on the keyboard.

The third control circuit is for imparting a pitch bend to a sound having the lowest pitch among a plurality of sounds generated at the same time, and is functionally similar to the lowest sound detecting circuit 18 in FIG. Is. Therefore, the third mode selection switch S
_{When 3} is turned on, the pitch bend can be applied only to the lowest note among the plurality of notes corresponding to the plurality of keys pressed on the keyboard.

The fourth control circuit is for imparting a pitch bend to the highest pitch of a plurality of tones generated at the same time, except that its function is to detect the highest tone instead of the lowest tone. This is similar to the above-mentioned third control circuit. Therefore, when the fourth mode selection switch S ₄ is turned on, the pitch bend can be applied only to the highest pitch note among the plurality of notes corresponding to the plurality of keys pressed on the keyboard.

The fifth control circuit is for imparting a pitch bend to the sound of the specific key range, and is functionally similar to the specific key range detection circuit 34 of FIG. Therefore, when the fifth mode selection switch S ₅ is turned on, the pitch bend can be added to the sound corresponding to the key only when the key belonging to the specific key range is pressed on the keyboard.

The sixth control circuit is for imparting a pitch bend to the loudest sound among a plurality of sounds that are simultaneously generated, and is functionally similar to the maximum value detection circuit 38 of FIG. is there. Therefore, when the sixth mode selection switch S ₆ is turned on, the pitch bend can be applied only to the sound having the highest volume among the plurality of sounds corresponding to the plurality of keys pressed on the keyboard.

The performer has the first to sixth performances before or during the performance.
By appropriately turning on any _one of the mode selection switches S _{1 to} S ₆ , it is possible to select a desired pitch bend application mode, so that a variety of performances can be enjoyed.

FIG. 6 shows a multi-tone electronic musical instrument according to a third embodiment of the present invention. The same parts as those in FIGS. 1 and 2 are designated by the same reference numerals and detailed description thereof will be omitted.

In the third embodiment, the first feature is that the variable frequency division system is adopted as the tone signal generation system, and the second feature is that the tone color or volume of a specific tone is used for the operation of the bend operator. The change is controlled based on this.

The specific sound detecting circuit 44 is for detecting one or more specific keys of a plurality of keys when a plurality of keys are pressed. Specifically, for example, the above-mentioned lowest sound detecting circuit 18 is provided.
(FIG. 1), the strongest touch detection circuit 32 (FIG. 2) or the specific key range detection circuit 34 (FIG. 3), and if desired, as shown in FIG. 5, the pitch bend imparting control circuit 40 and the mode selection switch circuit. It can also be configured as a combination of 42.

The specific sound detection circuit 44 supplies the output signal "1" to the selector 46 as the selection control signal S at the timing of the channel where one or more specific keys (or sounds) are detected.

In the selector 46, the selection control signal S is "0".
When the selection control signal S is "1", the reference voltage signal V _O is selectively transmitted, and when the selection control signal S is "1", the bend control voltage signal V _B from the bend operation circuit 48 is selectively transmitted.

The bend operation circuit 48 is adapted to generate a voltage signal V _B for bend-controlling the timbre or volume based on the operation of the bend operator.

The frequency division value memory 50 stores frequency division value data determined for each key of the keyboard, and every time the key code signal KC is received, the frequency division value data D corresponding thereto is stored.
Is sent.

When the number of channels in the key assigner 12 is N, the tone generator 52 corresponds to N variable frequency division tone generators TG _{1 to} TG _N.
Here, the configuration and operation of the tone generator TG ₁ corresponding to the first channel will be described as a representative.

In the tone generator TG ₁ , the latch circuit 52 _a includes the timing signal CH of the first channel.
Frequency division value data D from the frequency division value memory 50 according to 1,
The key-on signal KON from the key assigner 12 and the voltage signal V from the selector 46 are latched. When key depression information of a certain key is assigned to the first channel, the frequency division value data D1 corresponding to the key. And a voltage signal V1 for the key and a key-on signal KON1 for the key. In this case, the voltage signal V1
Is a bend control voltage signal V _B if the pressed key corresponds to a specific sound such as the lowest sound,
Otherwise, it will consist of the reference voltage signal V _O.

[0060] variable divider 52 _b is intended to generate a sound source signal having a pitch corresponding to the depressed key by dividing according to source clock signal to the frequency division value data D1 from the sound source oscillator 54 Then, this sound source signal is supplied to a voltage-controlled variable filter (VCF) 52 _c to impart a desired timbre characteristic.

[0061] The variable filter 52 _c is intended, for example, the cut-off frequency according to the voltage signal V1 is controlled, the voltage signal V1 is the voltage signal V _B if that is the voltage signal V _B for controlling Bend A so-called brilliance bend (or tone bend) is added to the musical tone signal by controlling the cutoff frequency to change over time in accordance with the above, otherwise a constant cutoff frequency is maintained according to the reference voltage signal V _O. It is supposed to do.

[0062] envelope generator (EG) 52 _d is for generating a voltage signal representative of the predetermined amplitude envelope according to the key-on signal KON1, this voltage signal to a variable gain amplifier (VCA) 52 _e of the voltage-controlled It is being supplied.

The variable gain amplifier 52 _e includes a variable filter 52 _c according to the voltage signal from the envelope generator 52 _d.
Amplitude envelope is added to the tone signal from
The musical tone signal to which the amplitude envelope is added is supplied to the sound system 56.

[0064] The variable gain amplifier 52 _e, may be controlled to gain by supplying the voltage signal V1 as shown by the broken line, In this manner, the bend control voltage signal V _B
Accordingly, the amplitude envelope (that is, the volume) can be subtly changed and controlled over time.

The above-described configuration and operation of the tone generator TG ₁ are the same for the other tone generators TG _{2 to} TG _N except that the latch timing is the timing of the corresponding channel. The tone signals from the tone generators TG _{1 to} TG _N are mixed and supplied to the sound system 56, and are output from the speaker through power amplification and the like. As a result, a plurality of (up to N) musical tones can be simultaneously generated from the speaker.

According to the multi-tone electronic musical instrument shown in FIG. 6, when a plurality of keys are pressed on the keyboard, and at least one of the keys corresponds to the specific sound designated by the specific sound detecting circuit 44, a plurality of sounds are generated. Among them, only for a specific sound, the tone color and / or the volume can be changed and controlled based on the operation of the bend operator, so that a performer can perform a performance expression that has been impossible up to now.

In the third embodiment, a multiplier is provided on the output side of the frequency division value memory 50, a selector similar to the selector 20 of FIG. 1 is provided in parallel with the selector 46, and this new arrangement is provided. The output signal of the specific sound detection circuit 44 is supplied to the selector as the selection control signal S, and the digital signal and the numerical value "1" obtained by A / D converting the output voltage signal V _B of the bend operation circuit 48 to its A input and B input. By supplying each of the data indicating, and supplying the output signal of this selector to the above-mentioned multiplier,
As in the case of the electronic musical instrument shown in FIGS. 1 to 5, the pitch bend can be applied to a specific note of a plurality of notes.

[0068]

As described above, according to the present invention, a specific one or a plurality of tones are designated among a plurality of tones generated simultaneously in a polyphonic electronic musical instrument, and the pitch, tone color and volume of only the designated tones are designated. Since the musical tone characteristics such as the above are changed and controlled according to the bend operation, a new playing style similar to the homophonic different string playing method in the electric guitar is possible, and the degree of freedom of performance expression is improved.

Further, the detection of a specific sound among a plurality of musical tones generated at the same time is carried out according to the key touch state, so that the musical tone desired to be manually controlled by the performer can be freely selected by the key touch, and the musical expression can be expressed. The degree of freedom of is further improved.

Furthermore, since the tone generating means having a plurality of channels for tone signal generation is used and the tone characteristic control is performed only for the channel detected as the specific tone channel, another tone generation for the specific tone generation is performed. The configuration is simple and inexpensive as compared with providing the means.

Furthermore, if a plurality of types of detection conditions are prepared as detection conditions for a specific sound among a plurality of musical tones generated at the same time, and one of these detection conditions can be selected, Appropriate detection conditions can be selected according to the performance tune and the progress of the performance, and the degree of freedom in performance expression is further improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a multi-tone electronic musical instrument for explaining an embodiment of the present invention.

FIG. 2 is a block diagram showing a multi-tone electronic musical instrument according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a multi-tone electronic musical instrument for explaining an embodiment of the present invention.

FIG. 4 is a block diagram of a multi-tone electronic musical instrument for explaining an embodiment of the present invention.

FIG. 5 is a block diagram showing a multi-tone electronic musical instrument according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a multi-tone electronic musical instrument according to a third embodiment of the present invention.

[Explanation of symbols]

10: keyboard circuit, 12: key assigner, 14: frequency number memory, 16: multiplier, 18: lowest tone detection circuit, 2
0, 46: selector, 22: pitch bend operation circuit, 2
4: accumulator, 26, 52: tone generator, 28, 56: sound system, 30: touch detection circuit, 32: strongest touch detection circuit, 34: specific key range detection circuit, 36: envelope generator, 38: maximum value detection Circuit, 40: Pitch bend imparting control circuit, 42: Mode selection switch circuit, 44: Specific sound detection circuit, 48: Bend operation circuit, 52 _c : Variable filter, 52 _e : Variable gain amplifier.

Claims (3)

(57) [Claims] 1. A pitch designating means for designating a pitch of a musical tone to be generated, wherein a plurality of pitches can be designated at the same time, and (b) a musical tone generating means having a plurality of channels. (C) each channel generates a tone signal corresponding to a tone assigned to the channel, and (c) a tone corresponding to the tone pitch designated by the tone pitch designating means in any one of the plurality of channels. And (d) a musical tone characteristic control that continuously changes in accordance with the operating state of the musical instrument, which has continuous operation means by which the player can continuously operate while the musical tone is generated during the performance. Information generating means for generating control information for use in: (e) a channel detecting means for detecting, as a specific sound channel, a channel to which a musical sound in a predetermined key touch state is assigned among the plurality of channels. , Polyphonic electronic musical instrument having a musical tone control means for controlling the tone characteristics of the musical tone signals in accordance with control information from said control information generating means only in the channel that is detected as (f) the specific sound channel. 2. The compound sound electronic musical instrument according to claim 1, wherein the predetermined key touch state is either a predetermined initial touch state or a predetermined after-touch state. 3. A pitch specifying means for specifying a pitch of a musical tone to be generated, wherein a plurality of pitches can be designated at the same time, and (b) a musical tone generating means having a plurality of channels. (C) each channel generates a tone signal corresponding to a tone assigned to the channel, and (c) a tone corresponding to the tone pitch designated by the tone pitch designating means in any one of the plurality of channels. And (d) a musical tone characteristic control that continuously changes in accordance with the operating state of the musical instrument, which has continuous operation means by which the player can continuously operate while the musical tone is generated during the performance. Control information generating means for generating control information for (1), and (e) selecting means for selecting any one detection condition of a plurality of predetermined detection conditions for a plurality of musical tones to be simultaneously generated. , (F) The channel detecting means for detecting, as a specific sound channel, a channel to which a musical tone satisfying the detection condition selected by the selecting means is detected, among the plurality of channels, (g) only the channel detected as the specific sound channel. A musical tone control means for controlling the musical tone characteristics of a musical tone signal according to the control information from the control information generating means.