JPH06161437A - Musical sound controller and musical sound generating device - Google Patents

Abstract

PURPOSE:To obtain the musical sound controller which can generate a rich musical sound of depth and enables a musical performance with rich variation by performing a generated musical sound signal with specified processing. CONSTITUTION:The musical sound controller consists of a level generating means 17 which detects the level of the musical sound signal generated by a musical sound signal generating means 15 and outputs a detected level signal, a 1st control signal generating means 18 which converts the detected level signal outputted by the level detecting means 17 according to a 1st characteristic and generates a 1st control signal, a 1st processing means 19a which processes the musical sound signal outputted by the musical sound signal generating means 15 according to the 1st control signal outputted by the 1st control signal generating means 18, a 2nd control signal generating means 18 which converts the detected level signal outputted by the level detecting means 17 according to a 2nd characteristic and generates a 2nd control signal, and a 2nd processing means 19b which processes the musical sound signal outputted by the musical sound signal generating means 15 according to the 2nd control signal outputted by the 2nd control signal generating means 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical tone control device and a musical tone generating device which are applied to an electronic musical instrument and which perform predetermined processing on a generated musical tone signal to enrich the musical tone.

[0002]

2. Description of the Related Art In recent years, electronic musical instruments such as synthesizers, electronic pianos, electronic organs, and single keyboards have been developed and have come into widespread use. Such an electronic musical instrument supplies musical tone data generated by operating a keyboard or an operation panel to a musical tone generating device provided inside the electronic musical instrument.

As a result, the musical tone generating device generates a digital musical tone signal corresponding to the musical tone data. This digital tone signal is converted into an analog tone signal by a D / A converter, further amplified by an amplifier, and supplied to a speaker. As a result, a musical sound is emitted from the speaker.

Further, there is also known an electronic musical instrument capable of performing a stereo performance in order to enhance the realism when playing the electronic musical instrument with a predetermined tone color. In such a stereo performance, the tone generator separately generates tone signals for the left and right channels,
It is realized by simultaneously emitting these sounds from the left and right channel speakers.

Further, in order to improve the quality of the reproduced musical sound, there is also known an electronic musical instrument which generates a musical sound for each channel by using a plurality of speakers corresponding to the reproduction band of the musical sound signal, for example, a woofer or a tweeter. ing.

[0006]

However, even in the case of using a woofer or a tweeter to generate musical tones by dividing the reproduction band, the same musical tone signal is simply band-divided and released from the woofer and the tweeter, respectively. There was a problem in that the sound itself was monotonous and lacked in richness, as it was just a sound. In addition, the musical sound of each band is a single point with a woofer and a tweeter.
Since it is only emitted from the point), there is a problem that the sound to be pronounced is poor in depth and spread, and it is not possible to perform a variety of performances.

The present invention has been made in view of the above circumstances, and an object thereof is to generate a rich and deep musical tone by subjecting a musical tone signal generated by a musical tone generating device to predetermined processing. It is an object of the present invention to provide a musical tone control device and a musical tone generating device that enable a variety of performances.

[0008]

In order to achieve the above-mentioned object, the musical tone control apparatus according to the invention of claim 1 detects the level of the musical tone signal generated by the musical tone signal generating means and outputs a detection level signal. Level detecting means for outputting, first control signal generating means for converting a detection level signal output by the level detecting means according to a first characteristic to generate a first control signal, and first control signal generating First processing means for processing the tone signal output by the tone signal generation means in response to a first control signal output by the means, and a detection level signal output by the level detection means are converted according to a second characteristic. Second control signal generating means for generating a second control signal, and processing the tone signal output by the tone signal generating means in response to the second control signal output by the second control signal generating means. Second processing means Characterized by comprising and.

For the same purpose, in addition to the configuration of claim 1, the tone generating apparatus of the invention described in claim 2 has the following features:
A first sounding means for producing a sound based on the tone signal processed by the first processing means; and a second sounding means for producing a sound based on the tone signal processed by the second processing means. However, the first sounding means and the second sounding means are arranged so as to have a predetermined positional relationship.

[0010]

According to the first aspect of the present invention, the level of the musical tone signal generated by the musical tone signal generating means is detected to form a detection level signal, and the detection level signal is generated in accordance with the first characteristic prepared in advance. A first control signal is created by converting. Here, the first characteristic may be a characteristic in which the output first control signal changes linearly or non-linearly with respect to the magnitude of the input detection level signal.

For example, as shown in FIG. 3A, the first control signal changes at a constant low level while the input detection level signal is small, and increases when the detection level signal becomes medium. The signal having a characteristic that it becomes constant at a high level when the detection level signal becomes large when turning.

The first control signal thus created is used to process (for example, multiply) the musical tone signal output from the musical tone signal generating means and output the processed musical tone signal. In the characteristic shown in FIG. 3 (A), for example, the portion of the processed musical tone signal having a low level of the musical tone signal before the processing becomes smaller, and conversely, the portion of the musical tone signal having a higher level of the processing before the processing has the original level. Converted to maintain level. When a musical sound is reproduced based on this processed musical sound signal, small sounds become smaller,
The loud sound is emphasized, and it is perceived as a musical sound with a audible reduction.

On the other hand, the detected level signal detected is
The second control signal is created by performing conversion along the second characteristic prepared in advance. Here, like the first characteristic, the second characteristic is also a characteristic such that the second control signal, which is an output, changes linearly or non-linearly with respect to the magnitude of the detection level signal, which is an input. be able to.

For example, as shown in FIG. 3B, the second control signal changes at a constant high level while the input detection level signal is small, and decreases when the detection level signal becomes medium. If the detection level signal increases, the signal having a characteristic of being constant at a low level can be obtained.

The second control signal thus created is used to process (for example, multiply) the musical tone signal output by the musical tone signal generating means and output the processed musical tone signal. In the characteristic as shown in FIG. 3 (B), for example, in the characteristic shown in FIG. 3B, the processed musical tone signal maintains the original musical tone signal level in a portion where the unprocessed musical tone signal level is low, and conversely, the unprocessed musical tone signal level. The part where is large is converted to be small. When a musical sound is reproduced based on this processed musical sound signal, loud sounds become smaller,
A small sound is emphasized, and is perceived as a soft musical sound with no intonation.

In this way, when two kinds of musical tones of the same band, which are created by subjecting the same musical tone signal to different processing, are simultaneously pronounced, a rich musical tone with monotonous removed can be obtained. Further, by changing the first and second characteristics variously,
It is possible to generate a variety of musical tones. It is desirable that the first and second characteristics be different.

Further, in the invention described in claim 2,
For example, a speaker as a first sounding means that sounds based on the tone signal processed by the first processing means, and a speaker as a second sounding means that sounds based on the tone signal processed by the second processing means. And are arranged in a predetermined positional relationship to be pronounced.

As a result, musical tones in the same band, which have been processed to have a predetermined musical effect, can be produced from a plurality of positions. The vertical spread feeling can be achieved by arranging it at, and the horizontal expanse feeling can be realized by further arranging it at the left and right.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a musical tone control apparatus of the present invention will be described in detail below with reference to the drawings. In the following,
The configuration and operation of the tone reproduction system will be mainly described.

FIG. 1 is a block diagram showing a schematic configuration of an electronic musical instrument to which the musical sound control device according to the present invention is applied.

A central processing unit (hereinafter referred to as "CPU") 10, a read only memory (hereinafter referred to as "ROM") 11, and a random access memory (hereinafter referred to as "RAM"), which are the main elements constituting the present electronic musical instrument. The tone generator 12 (tone generator) 15 and the tone generator 15 are connected to each other via a system bus 30 including an address bus and a data bus.

The CPU 10 controls the entire electronic musical instrument according to a control program stored in the ROM 11. For example, the CPU 10 is the keyboard 1
When the 4 key is pressed, an assigner process for allocating a tone generation channel, an access process for the tone generation unit 15, and the like are executed.

An operation panel 13 and a keyboard 14 are further connected to the CPU 10 via a dedicated line. Details of these will be described later.

The ROM 11 stores the control program for operating the CPU 10 described above, and also the CPU
Various types of fixed data used by the various processes by the unit 10 are stored.

The ROM 11 also stores tone code data that has been pulse code modulated (PCM). Hereinafter, the portion of the ROM 11 in which the musical tone waveform data is stored is particularly referred to as a “waveform memory”. This waveform memory stores a plurality of types of tone waveform data corresponding to each tone color in order to realize a plurality of tone colors.

The contents stored in the ROM 11 are read out in a time division manner by the CPU 10 and the tone generating section 15 via the system bus 30. That is, the CPU 10 uses the system bus 30 to read the control program (command) from the ROM 11.
Is read and interpreted / executed, and predetermined fixed data is read and used for predetermined arithmetic processing. Further, the musical tone generating section 15 reads out musical tone waveform data from the waveform memory of the ROM 11 using the system bus 30 and generates a digital musical tone signal SD.

The RAM 12 temporarily stores various kinds of data necessary for executing the control program, and defines areas such as a data buffer, a register, and a flag. Data fetched from the operation panel 13, the keyboard 14 and the like described later are also temporarily stored in the RAM 12. The contents stored in the RAM 12 are stored in the system bus 3
It is accessed by the CPU 10 via 0.

Operation panel 1 connected to the CPU 10
Reference numeral 3 is composed of switches for instructing the electronic musical instrument to perform various operations, a numerical value input device for inputting numerical values to be set in the electronic musical instrument, and a display device (not shown) for displaying predetermined information.

The above switches include a tone color changeover switch for changing the tone color, a volume switch for changing the volume,
It includes an effect switch and the like for exhibiting various music effects.

The numerical value input device is used to input various parameters to be set in the electronic musical instrument by numerical values, and is realized by a dial or ten keys, for example.
The display is composed of, for example, an LCD, and CP
It is used to display various messages and the state of the electronic musical instrument under the control of U10.

The operation panel 13 is connected to the CPU 10 via a panel scan circuit (not shown). The panel scan circuit scans the on / off state of each switch of the operation panel 13 and outputs it as switch data. This switch data is sent to the CPU 10 and C
It is stored in the RAM 12 under the control of the PU 10 and is used for creating an event map of the panel switch (details will be described later).

The keyboard 14 is composed of a key for the performer to indicate the pitch of a musical tone, and a key switch that opens and closes in conjunction with this key. The keyboard 14 is connected to the CPU 10 via a key scan circuit (not shown).

The key scan circuit scans the state of the key switch of the keyboard 14 and outputs it as key data indicating the on / off state of the key. This key data is
RAM1 sent to CPU10 and under control of CPU10
2 and is used for creating an event map of the key (details will be described later).

The musical tone generating section 15 is used as a musical tone signal generating means and comprises, for example, 32 oscillators and a mixing circuit for mixing the digital musical tone signals output by the respective oscillators. Although not described in detail, each oscillator is composed of, for example, a waveform synthesizing circuit, an envelope generator and a multiplier.

Each of the oscillators is driven in a time-division manner based on the musical tone data given from the CPU 10 to generate a digital musical tone signal, and these are mixed by a mixing circuit to generate a digital musical tone signal SD. It

The digital tone signal SD generated by the tone generator 15 is supplied to the D / A converter 16 as a part of the tone controller.

The tone control device comprises a D / A converter 16, a level detector 17, an attenuator control circuit 18, and attenuators 19a and 19b.
The digital tone signal SD output by
It outputs two systems of analog tone signals.

The D / A converter 16 includes a tone generating section 15
The digital musical tone signal SD supplied from the device is converted into an analog musical tone signal SA. The analog tone signal SA (hereinafter, referred to as “audio signal SA”) output from the D / A converter 16 is supplied to the level detector 17 and the attenuators 19a and 19b.

The level detector 17 corresponds to a level detecting means, and is composed of, for example, a peak hold circuit. The level detector 17 detects the peak of the input audio signal SA and outputs it as a detection level signal SL.

That is, the level detector 17 is, for example, as shown in FIG.
As shown in (A), when a predetermined peak of the audio signal SA is detected, the detection level signal SL corresponding to the peak value is output. The detection level signal SL is then attenuated with a predetermined time constant, but when the audio signal SA having a higher level than the current detection level signal SL is input next, the detection level signal SL is raised to its peak value. After that, it decays with a predetermined time constant as in the above.

By repeating the above operation, the level detector 17 continues to output the detection level signal SL corresponding to the peak-peak of the audio signal SA. The detection level signal SL detected by the level detector 17 is supplied to the attenuator control circuit 18.

Although the level detector 17 is configured to detect only the peak on the positive side of the audio signal SA, as shown in FIG. 2B, the audio signal S is detected.
The detection level signal SL may be generated by detecting the peak after the half-wave rectification of A. With this configuration, it is possible to obtain the detection level signal SL that more closely reflects the amplitude level of the audio signal SA.

The attenuator control circuit 18 includes the first and second
It corresponds to the control signal generating means of 1) and generates and outputs the first control signal SC1 and the second control signal SC2 based on the input detection level signal SL.
Here, the first and second control signals SC1 and SC2 are
For example, as shown in FIG. 3, it is generated as a signal having a value in the range of “0” to “1”.

Here, the value "0" means that the audio signal SA supplied to the attenuator 19a or 19b is attenuated and output, that is, the audio signal SA is cut off. The value "1" means that the audio signal SA supplied to the attenuator 19a or 19b is output without being attenuated at all. An intermediate value between these means that the audio signal SA is attenuated and output according to the value.

The attenuator control circuit 18 is shown in FIG.
The characteristics shown in (A) are converted to generate the first control signal SC1. That is, the input detection level signal S
While L is small, it stays at a constant low level, and when the detection level signal SL becomes medium, it starts to increase, and the detection level signal S
When L becomes large, it outputs the first control signal SC1 having the characteristic of being constant at a high level.

Further, the attenuator control circuit 18 converts the characteristics as shown in FIG. 3B, for example, to generate the second control signal. That is, the input detection level signal S
While L is small, it stays at a constant high level, and when the detection level signal SL becomes medium, it starts to decrease, and the detection level signal S
When L becomes large, the second control signal SC2 having the characteristic of being constant at a low level is output.

The attenuator control circuit 18 is realized by, for example, a function generator that generates a signal according to a desired function. The first control signal SC1 generated by the attenuator control circuit 18 is supplied to the attenuator 19a, and the second control signal SC1 is supplied to the attenuator 19a.
The control signal SC2 of is supplied to the attenuator 19b.

The conversion characteristic shown in FIG. 3 is an example, and the conversion characteristic is not limited to the above and may be configured to have various conversion characteristics. That is, it can be configured to perform conversion with any desired characteristic in accordance with the desired type of musical sound and the position where the speakers 21a and 21b are arranged.

Further, a plurality of function generators are provided in advance,
An arbitrary function may be selected and converted according to the control from the CPU 10. In this case, the selection of the function is realized by giving a selection signal from the CPU 10 to the attenuator control circuit 18. According to such a configuration, there is an effect that a desired musical sound can be easily selected.

The attenuator 19a corresponds to the first processing means, and processes the input audio signal SA according to the first control signal SC1 and outputs it. The attenuator 19a is composed of, for example, a multiplier. That is, the input audio signal SA and the first control signal SC1 are multiplied and output. The output of this attenuator 19a is supplied to the amplifier 20a.

The attenuator 19b corresponds to the second processing means, and processes the input audio signal SA according to the second control signal SC2 and outputs it. The attenuator 19b is also composed of, for example, a multiplier. That is, the input audio signal SA and the second control signal SC2 are multiplied and output. The output of this attenuator 19b is supplied to the amplifier 20b.

The amplifiers 20a and 20b are well-known amplifiers that amplify an input audio signal with a predetermined amplification factor and output it. The audio signals that have been amplified by the amplifiers 20a and 20b are subjected to speaker 21a and speaker 2a, respectively.
1b.

The speakers 21a and 21b are respectively the first
This is a well-known means for converting an audio signal as an electric signal into an acoustic signal, which corresponds to the second sounding means. With these speakers 21a and 21b,
A musical sound corresponding to the pressing of a key on the keyboard 14 is emitted.

Next, the operation of this embodiment having the above-mentioned structure will be described in detail. In the following, only the portions related to the present invention are shown in the drawings and will be described.

FIG. 5 is a main flowchart showing the processing of the electronic musical instrument to which the musical tone control apparatus according to the present invention is applied, which is started by turning on the power.

That is, when the power is turned on, first, the CPU
Initialization processing of 10, the RAM 12, the musical sound generating unit 15 and the like is performed (step S10). In this initialization process, CP
U10 internal register and flag clear processing, RAM1
Processing for setting initial values in various buffers, registers, flags, etc. defined in 2 and processing for setting initial values in the musical sound generating unit 15 to suppress unnecessary sound generation are performed.

Next, panel event processing is performed (step S11). In this panel event process, first, the operation panel 13 is scanned to capture the switch data indicating the setting state of each switch as a bit string corresponding to each switch. Next, the previously read switch data (already stored in RAM 12)
And the switch data read this time are compared to check whether or not there is a different bit.

Then, when there is a different bit, it is recognized that there is a switch event, and an event map in which the bit corresponding to the changed switch is turned on is created.

By referring to this event map, various processes corresponding to the switch operation of the operation panel 13, for example, tone color changing process corresponding to the tone color changeover switch and a process for exhibiting a predetermined music effect corresponding to the effect switch can be performed by referring to this event map. Done.

For example, when it is determined by referring to the event map that there is an event of the tone color changeover switch, a tone color number corresponding to the designated tone color is generated and stored in a predetermined area of the RAM 12. This tone color number is sent to the tone generation section 15 and is used to specify the tone waveform data to be read from the waveform memory.

The processing for each switch on the operation panel 13 is not directly related to the present invention, and therefore its explanation is omitted.

Next, keyboard event processing is performed (step S12). In this keyboard event process, first, the keyboard 14 is scanned through the key scan circuit to capture the key data indicating the pressed state of each key as a bit string corresponding to each key. Next, the previously read key data (which has already been stored in the RAM 12) is compared with the currently read key data to check whether there is a different bit.

Then, when different bits are present, it is recognized that there is a key event, and an event map in which the bit corresponding to the changed key is turned on is created.

Then, by referring to this event map, a key number indicating a key having an event and touch data indicating a key pressing strength (pressing speed) are created. The key number and the touch data are sent to the musical sound generating unit 15 and used for the key depression process / key release process for the key having the event.

When the keyboard event process is completed, the process returns to step S11 and the same process as described above is repeated. When an event corresponding to a panel operation or a keyboard operation occurs in the process of repeatedly executing steps S11 to S12, various functions of the electronic musical instrument are exhibited by performing a process corresponding to the event.

Next, details of the keyboard event process will be described with reference to the flowchart shown in FIG.

In the keyboard event processing, as described above,
First, an event map of a key is created, and it is determined by referring to this event map whether or not to process each key.

In the keyboard event processing, it is first checked whether or not there is a key on event (step S2).
0). Whether or not there is an on event for this key is determined by checking the above event map. When it is determined that there is an on event, the musical sound data is set in the musical sound generating unit 15 (step S21).

Specifically, one oscillator in the tone generating section 15 is selected by a predetermined algorithm, and the tone data is sent from the CPU 10 to this selected oscillator. It should be noted that the selection of the oscillator, that is, the assigning process of the tone generation channel is a well-known technique, and therefore its explanation is omitted.

Here, the tone data set in the oscillator is the tone color number corresponding to the tone color designated by the tone color changeover switch (not shown), the key number of the key having the above-mentioned event, and the touch data.

The tone color number is used as an address for reading the musical tone waveform data from the waveform memory. The key number is used to specify the speed of reading the tone waveform data from the waveform memory, and the touch data is used to determine the shape of the envelope to be added to the tone waveform.

The tone color number and key number are set in the waveform synthesizing circuit in the tone generating section 15 described above, and the touch data is set in the envelope generator in the tone generating section 15 described above.

When the setting of the musical tone data to the musical tone generating section 15 is completed, a key depression process is next performed (step S22). The key depression process is a process of operating the oscillator based on the musical tone data set in the musical tone generating unit 15 in step S21 to generate the digital musical tone signal SD.

That is, each oscillator of the musical sound generating section 15 is
In the waveform synthesis circuit, the tone waveform data in the waveform memory specified by the tone color number is read at a speed according to the key number to generate a tone waveform signal, and the envelope generator generates an envelope signal according to the touch data. By multiplying the musical tone waveform signal and the envelope signal by a multiplier, a digital musical tone signal to which an envelope is added is generated. Then, the digital tone signals generated by the respective oscillators are mixed by the mixing circuit and output as the digital tone signal SD.

The digital tone signal SD thus generated by the tone generator 15 is supplied to the D / A converter 16 of the tone controller. The D / A converter 16 converts the digital musical tone signal SD supplied from the musical tone generating section 15 into an analog musical tone signal SA, and supplies it as an audio signal SA to the level detector 17 and the attenuators 19a and 19b.

The level detector 17 detects the peak of the input audio signal SA and supplies it to the attenuator control circuit 18 as a detection level signal SL. In the attenuator control circuit 18, as described above, the detection level signal SL is converted into the first control signal SC1 and the second control signal SC2 having the predetermined characteristics and supplied to the attenuators 19a and 19b, respectively.

In the attenuator 19a, the D / A converter 1
The audio signal SA supplied from 6 and the first control signal SC1 supplied from the attenuator control circuit 18 are multiplied and output. The output of this attenuator 19a is supplied to the amplifier 20a.

At this time, if the first control signal SC1 generated according to the characteristic shown in FIG. 3A is used, as shown in FIG. 4A, the level of the input signal to the attenuator 19a is increased. If is small, it is attenuated by a large percentage,
Conversely, if it is large, the audio signal attenuated at a small rate is output. As a result, the loud sound remains as it is, but the quiet sound becomes smaller and the loud sound is emphasized, and is perceived as a musical sound with a audible reduction.

In the attenuator 19b, the D / A converter 1
The audio signal SA supplied from 6 and the second control signal SC2 supplied from the attenuator control circuit 18 are multiplied and output. The output of this attenuator 19b is supplied to the amplifier 20b.

At this time, when the second control signal SC2 converted according to the characteristic shown in FIG. 3B is used, the input signal to the attenuator 19b is changed as shown in FIG. 4B. If the level is high, it will be attenuated at a high rate,
Conversely, if it is small, the audio signal attenuated at a small rate is output. As a result, the small sound remains as it is, but the large sound becomes small, so that the small sound is emphasized, and it is recognized as a soft musical sound with no intonation.

The first and second control signals SC1 and SC
The characteristics of No. 2 are not limited to those shown in FIG. 3 and may be configured to have any characteristics as described above.

The audio signals processed by the tone control device as described above are respectively amplified by the amplifiers 20a and 20b, converted into acoustic signals by the speakers 21a and 21b, and simultaneously emitted.

At this time, depending on the positions where the speakers 21a and 21b are installed, various musical sound effects can be exhibited in combination with the effects of the above-described audio signal processing. For example, if the speakers 21a and 21b are arranged front and back, a depth feeling can be realized, if they are arranged vertically, a feeling of vertical expansion can be realized, and if they are arranged further left and right, a feeling of horizontal expansion can be realized.

If it is determined in step S20 that there is no key-on event, it is checked whether or not there is a key-off event (step S25). If it is determined that there is no key-off event, the process returns from this keyboard event processing routine without performing any processing.

On the other hand, if it is determined that there is a key-off event, key release processing is performed (step S26). This key release process is a process of stopping the sound generation corresponding to the released key on the keyboard 14. When this key release processing is completed, this keyboard event processing routine returns and returns to the main routine.

As described above, according to this embodiment, the level of the audio signal SA generated by the musical tone generating section 15 is detected to be the detection level signal SL, and this detection level signal SL is prepared in advance. Since the first and second control signals SC1 and SC2 are created by conversion according to the characteristics, and the audio signal SA is processed separately according to the control signals SC1 and SC2 to be used for sound generation, Even with signals, the sound that is produced is richer and more versatile.

Further, when the musical sound is emitted based on the audio signal processed as described above, the speaker 21
By arranging a and 21b in a predetermined positional relationship, it is possible to give a sense of depth and breadth to the sound to be sounded, and it is possible to realize a musical sound generating device capable of performing a variety of performances.

In the above embodiment, as shown in FIG. 1, the digital tone signal SD output by the tone generator 15 is converted into the analog tone signal SA by the D / A converter 16 and the level of the signal is changed. Although it is configured to detect and multiply,
For example, as shown in FIG. 7, level detection and multiplication are performed on the digital musical sound signal SD, and the attenuators 19a and 19a
It may be configured to be converted into an analog tone signal after being processed in b.

Since the configuration shown in FIG. 7 performs almost the same operation as that of the above-described embodiment except that each signal processing is performed by the digital signal, the description thereof will be omitted. According to this configuration, since the signal processing can be performed digitally,
It enables more precise processing of musical tone signals.

Further, in the above-mentioned embodiment, the case where the musical tone signal of an arbitrary specific frequency band is processed and outputted is described. For example, as shown in FIG.
Then, a digital tone signal of the entire frequency band is generated, subjected to the above-mentioned predetermined processing, and supplied to the amplifiers 20a and 20b.

Then, the output signal of the amplifier 20a is directly supplied to the speaker 21a and is also supplied to the speaker 21c via the capacitor 22a. Similarly, the amplifier 20b
Is directly supplied to the speaker 21b and is also supplied to the speaker 21d via the capacitor 22b. The capacitors 22a and 22b are used for band separation.

With this configuration, the same effect as that of the above-described embodiment is added for each frequency band of the musical sound. Therefore, it is possible to improve the quality of the musical sound by pronouncing each frequency band using, for example, a woofer or a tweeter, and to exhibit the same effect as that of the above-described embodiment with respect to the musical sound signal of all frequency bands.

[0093]

As described above in detail, according to the present invention, by performing a predetermined process on the musical tone signal generated by the musical tone generating device, it is possible to generate a musical tone rich in depth and breadth and rich in variation. It is possible to provide a musical sound control device and a musical sound generation device that enable unhindered performance.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an electronic musical instrument to which a musical sound control device of the present invention is applied.

FIG. 2 is a diagram for explaining the operation of the level detector of the musical sound control device of the present invention.

FIG. 3 is a diagram for explaining the operation of an attenuator control circuit of the musical sound control device of the present invention.

FIG. 4 is a diagram showing an example of waveform processing by the musical sound control device of the present invention.

FIG. 5 is a flowchart (main routine) showing the operation of the present invention.

FIG. 6 is a flowchart (keyboard event processing routine) showing the operation of the present invention.

FIG. 7 is a block diagram showing the configuration of another embodiment of the musical sound control device of the present invention.

FIG. 8 is a block diagram showing the configuration of still another embodiment of the musical sound control device of the present invention.

[Explanation of symbols]

 10 CPU 11 ROM 12 RAM 13 Operation Panel 14 Keyboard 15 Musical Sound Generator 16 D / A Converter 17 Level Detector 18 Attenuator Control Circuit 19a, 19b Attenuator 20a, 20b, 21c, 21d Amplifier 21a, 21b Speaker 22a, 22b Capacitor

Claims (2)

[Claims] 1. A level detection means for detecting the level of a tone signal generated by the tone signal generation means and outputting a detection level signal, and a detection level signal output by the level detection means for conversion according to a first characteristic. First control signal generating means for generating a first control signal, and processing the tone signal output by the tone signal generating means in response to the first control signal output by the first control signal generating means. First processing means, second control signal generation means for converting a detection level signal output by the level detection means according to a second characteristic to generate a second control signal, and second control signal generation Second processing means for processing the tone signal output by the tone signal generating means in response to a second control signal output by the means. 2. In addition to the structure according to claim 1, a first sounding means for producing a sound based on the musical tone signal processed by the first processing means, and a second sounding means for processing the second sounding means. A second sound producing means for producing a sound based on a tone signal, wherein the first sound producing means and the second sound producing means are arranged so as to have a predetermined positional relationship. .