JP3334483B2 - Waveform memory type tone generator that can input external waveform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument and the like, which reads musical tone waveform data from a waveform memory based on performance information and the like, generates musical tone signals on a plurality of channels of a sound source, and inputs waveform data from outside. The present invention relates to a waveform memory type tone generator capable of inputting an external waveform capable of generating an input sound.

[0002]

2. Description of the Related Art Conventionally, in an electronic musical instrument or the like, for example, time-series sampling data of a musical tone waveform is stored in a waveform memory as musical tone waveform data, and based on performance information stored in a keyboard, a MIDI interface or a memory. There is a waveform memory type tone generator which reads out tone waveform data of a designated tone color from a waveform memory and generates a tone signal by a sound source to generate a tone.

A sound source used in this type of device is composed of an LSI. For example, by performing time-division multiplexing processing on a plurality of channels such as 16 channels, a plurality of sounds can be generated substantially simultaneously. I have. Further, the sound source performs pitch conversion, digital filter processing, volume control processing, modulation processing such as amplitude, pitch, and timbre on the waveform data independently for each channel. Further, after mixing the plurality of channels subjected to the above processing by mixing processing, the apparatus is provided with various effect control processing functions such as reverb processing and non-linear conversion processing for the mixed waveform data.

[0004]

By the way, when a waveform is input from the outside by a microphone or the like to be played with a musical tone generated by the sound source, the sound quality and volume of the external input waveform are controlled, and reverberation is added. However, if a new circuit of another system is added for an external input waveform in order to perform these processes, the circuit becomes complicated and large-scale. In order to use the processing function of sound source effect control, some models have an interface that can input an external waveform in the middle of the sound source, but a dedicated data conversion circuit is required to input the external waveform. Become.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a waveform memory type tone generator for an electronic musical instrument or the like, which can control the effect of a sound source on an external input waveform with a simple circuit configuration.

[0006]

According to a first aspect of the present invention, there is provided a waveform memory type tone generator capable of inputting an external waveform, comprising: performance information input means for inputting performance information; performing a waveform memory for storing tone waveform data, and the external waveform supply means for supplying a digital external waveform data, a time-division processing in a plurality of channels, each
When processing channels, the address signals are independent of each other.
And a sound source for generating a musical tone by performing predetermined arithmetic processing on the input waveform data in a channel assigned to the input waveform data, and an external waveform data supplied from the external waveform supply means. An external waveform channel allocating means for allocating a channel of the sound source in accordance with a predetermined condition as a channel for generating an input sound according to a predetermined condition; and a channel for generating a musical tone corresponding to performance information inputted from the performance information input means. Musical tone waveform channel allocating means for allocating a channel of the sound source, wherein when the channel of the input sound is not allocated, a channel is allocated to the performance information from all the channels, and the channel of the input sound is allocated. When the performance information is A sound source waveform channel assignment means for assigning a channel, address signal generated by the sound source before
The address was assigned to the external waveform supply means.
Sometimes, the external waveform supplied from the external waveform supply means
Input data to the sound source and assign to the waveform memory
If the address is a read address, read from the waveform memory.
It is controlled so that the detected tone waveform data is input to the sound source.
Decoding means for controlling at least one of the sound sources.
One channel can be assigned to one of the input of the external waveform data and the reading of the tone waveform data from the waveform memory, and when the input of the external waveform data is detected, Input sound channels are assigned , and when processing each channel,
For the channel assigned to the sound waveform data, the waveform
Outputs the address assigned to the memory,
For channels assigned to shape data, use the external waveform
By outputting the address assigned to the supply means, the sound source is allocated to the sound source by sharing the sound source channel for the generation of the sound by the performance information and the sound waveform data and the input sound by the external waveform data. It is characterized by doing so. In addition, outside of claim 2
The waveform memory type tone generator that can input waveforms
Information input means for inputting information and digital musical sound waveforms
Waveform memory for storing data and digital external waves
External waveform supply means for supplying shape data, and multiple channels
Performs time-division processing on the input waveform data
Perform predetermined calculations on the waveform data in the assigned channel
A sound source that performs processing and generates a musical tone, and supplies the external waveform
Generates input sound by external waveform data supplied from the means
Channel according to the predetermined conditions
External waveform channel assignment to assign sound source channels
Means and performance information input from the performance information input means
As a channel for generating musical tones corresponding to
Tone channel assignment for assigning sound source channels
The input sound channel is assigned.
If not, the performance information from all channels
Assign the channel and assign the channel of the input sound.
If it is assigned, play the above from other channels
Sound source waveform channel assignment for assigning channels to information
Means for controlling the channel of the sound source by the external waveform
Data input and tone waveform data from the waveform memory
And can be assigned to any of
When detecting the input of the external waveform data, the sound source
Available channels or channels secured by truncation
Channel as the input sound channel of the external waveform data.
By assigning the performance information and the musical sound waveform.
The tone generation by the data and the external waveform data
Assign the sound source channel for the input sound generation
The sound source is shared.

[0007]

According to the first aspect of the present invention, when digital external waveform data is supplied from an external waveform supply means, the external waveform data is input to a sound source, and the performance information is input. When the performance information is input from the means, the musical tone waveform data is read from the waveform memory and input to the sound source. At this time, the decoding means
Address signal generated by the sound source is supplied to external waveform supply means.
If the address was assigned to
External waveform data supplied from the supply means is input to the sound source
And the address is assigned to the waveform memory
The tone waveform data read from the waveform memory
Control to input to The input channel for the input sound based on the external waveform data and the channel for the tone based on the performance information are allocated by the external waveform channel allocating means and the musical tone waveform channel allocating means, respectively. Is processed. That is, in the sound source, the external input waveform data is handled in the same manner as the performance information, and the input sound is generated in the same manner as the musical tone of the performance information. Therefore, the processing function of the sound source can be shared with the external waveform data.

The conditions for allocating a channel for external waveform data by the external waveform channel allocating means include a condition that a predetermined channel is allocated for external waveform data, and a condition that a channel is determined from a plurality of predetermined channels. There is a condition of selecting and allocating, and a condition of allocating from any currently vacant channel (when not vacant, a channel allocated to less important musical tone waveform data). When assigning channels for musical tone waveform data, assign channels other than the channels currently assigned for external waveform data. External waveform of claim 2 can be input
Claims 1 and 2 provide an efficient waveform memory type tone generator.
Similarly, if the processing function of the sound source can be shared with external waveform data
In both cases, the input sound channel of the external waveform data is
Empty channel or channel secured by truncation
Channels are assigned, so that the input sound
Minimize the effect of performance information on musical sounds when pronounced
be able to.

[0009]

FIG. 1 is a block diagram of an electronic musical instrument showing an embodiment of the present invention. A CPU 1 uses a working area of a RAM 3 based on a control program stored in a ROM 2 to control the electronic musical instrument. Perform overall control,
The performance information input from the MIDI interface 4 is fetched. Further, via the parallel I / O 6, the operation switch of the panel 7 and the output of the peak detector 8 for detecting the input level of the microphone 5 are scanned. Furthermore, the parallel I
A signal for controlling display is sent to the display of panel 7 via / O6.

[0010] The peak detector 8 compares the input level of the sound to the microphone 5 with a preset peak level that can be determined as a sound input to determine the presence or absence of a sound input. In addition,
The peak detector 8 is an example of a method for detecting the presence or absence of a voice input to the microphone 5, and any method for detecting the presence or absence of a voice input may be used.

The sound source 9 performs time-division multiplexing processing on 16 channels so that a plurality of sounds can be produced substantially simultaneously. For the tones to be produced, the head address of the tone waveform data in the waveform memory 10 and The CPU 1 is provided with various registers for setting pitch information and other data for controlling various effects for each channel. On the other hand, CPU
1 assigns any one (or several) of the 16 channels of the sound source 9 as a tone generation channel (hereinafter referred to as a "performance channel") for generating a tone corresponding to the performance information, Data for generating the musical tone (data for controlling the generated musical tone) is set in the various registers of the assigned performance channel.

That is, in the register of the sound source 9, the start address, the pitch information, the data for controlling the various effects, the end address of the waveform data (in addition to the start address), the loop address, the tone Data for controlling the tone of each channel, such as a digital filter coefficient for controlling the characteristic, envelope control data for controlling the time change of the tone characteristic, and data for controlling the depth of an effect such as reverb, are set. In addition, data (algorithm control data, coefficient data) for controlling the type and characteristics of the effector such as reverb applied to the whole is set.

The CPUI sets any one (or more) of the 16 channels of the sound source 9 as an audio input channel for inputting the audio (hereinafter, referred to as a “microphone channel”). The address for inputting the audio (the address of an empty area of the waveform memory as described later) and the data for controlling various processes for the input audio are set in the various registers of the assigned microphone channel. .

The waveform memory 10 is a memory that stores tone waveform data (time-series sampling data of tone amplitude) corresponding to a tone that can be designated by the electronic musical instrument in order from the top address corresponding to each tone. 9 outputs the address data to the waveform memory 10 and the CPU 1 reads out the tone waveform data corresponding to various addresses of the tone waveform data set in the register of the sound source 9.

The sound source 9 outputs a synchronizing signal synchronized with the tone generation channel as shown in FIG. 5A to the A / D conversion circuit 11, and the A / D conversion circuit 11 synchronizes with the synchronizing signal. Then, an analog signal input from the microphone 5 is converted into a digital signal and output to the driver circuit 12. In addition,
As will be described in an embodiment described later, a synchronization signal synchronized with the timing of the microphone channel may be used.

On the other hand, the address line of the sound source 9 is
The decoder 13 decodes the address data output from the sound source 9 and outputs opposing enable / disable signals to the waveform memory 10 and the driver circuit 12, respectively.
Musical tone waveform data from waveform memory 10 and driver circuit 1
2 to switch and capture the external waveform data.

That is, the tone generator 9 generates and outputs address data at each sampling cycle at the channel timing of the performance channel based on each address of the waveform data and pitch information set in the register of the channel. At this time, the decoder 13 decodes the address data, outputs a disable signal to the driver circuit 12, and outputs an enable signal to the waveform memory 10. In the case of the microphone channel, the sound source 9 outputs the address data of the empty area of the waveform memory 10 in accordance with the address set in the register of the channel. At this time, the decoder 13 decodes the address data of the empty area. Then, a disable signal is output to the waveform memory 10 and an enable signal is output to the driver circuit 12.

With the above configuration, the sound source 9 reads out the sound waveform data necessary for generating the tone from the waveform memory 10 and assigns it to the microphone channel in the channel assigned to the performance channel among the 16 channels of the sound source 9. The sound source 9 reads the external waveform data from the A / D conversion circuit 11 via the driver circuit 12 on the selected channel. The waveform memory 10 and the driver circuit 1
2 sets each output terminal to high impedance by the disable signal, so that the input level of the driver circuit 12 and the output data of the waveform memory 10 do not interfere with each other.
Further, the access state of the waveform memory 10 is
2 does not interfere with the output data.

As described above, when tone waveform data is input from the waveform memory 10 and external waveform data is input from the driver circuit 12 to each channel assigned to the sound source 9, the sound source 9 In accordance with the setting of the channel register, the tone waveform data read from the waveform memory 10 is subjected to various effects, digital filters, envelope control, and other processing to synthesize a tone signal. According to the setting of the above, an external tone signal which has been subjected to processes such as adding various effects, digital filtering, and volume control to the input external waveform data is synthesized. A plurality of synthesized tone signals and an external tone signal are subjected to two mixing processes for effect input and direct output in accordance with register settings of each channel, and an effect input signal and a direct signal are formed as an accumulation result. Is done. Further, the effect input signal is subjected to effect processing such as reverb according to the setting of the register, and an effect output signal is formed. Further, the final tone signal formed by mixing the direct signal and the effect output signal is a digital tone signal,
/ A conversion circuit 14. Then, the D / A conversion circuit 14 converts the digital musical sound signal into an analog signal, and mixes the direct input signal from the microphone 5 with the adding circuit 15 to generate a musical sound and a sound with the sound system 16.

FIG. 2 is a flowchart of a main routine of a control program executed by the CPU 1, FIG. 3 is a flowchart of a note-on event processing routine according to performance information, and FIG. 4 is a flowchart of a microphone processing routine for performing processing regarding microphone input. Yes, the control operation of the CPU 1 will be described based on each flowchart. In addition,
In the following description and flowcharts, the registers and flags used for control are denoted by the following labels, and their storage contents are denoted by the same labels unless otherwise specified.

ST: State with microphone input (ST = 1)
And a flag indicating the absence of microphone input (ST = 0) NN: Register of note number of note-on event based on performance information i: Register of channel number of channel assigned as performance channel Mch: Channel assigned as microphone channel CNT: Counter register that delays the mute timing of the microphone channel n: Register of a constant that determines the delay amount of the mute timing of the microphone channel

When the processing of the main routine of FIG. 2 is started, initialization such as resetting of registers and flags is performed in step S1, and performance information (MIDI information) input from the MIDI interface 4 is checked in step S2. If there is the performed performance information, a process corresponding to the performance information is executed. For example, when a note-on is input, the note-on event processing of FIG. 3 is performed. When the MIDI processing is completed, in step S3, panel processing such as event detection of an operation switch of the panel 7 and display control is performed.
At 4, the microphone processing of FIG. 4 is performed, and the process returns to step S2.

In the note-on event processing of FIG. 3, in step S21, the note number having the note-on event is set in the register NN, and in step S22, it is determined whether or not the flag ST = 1, and ST = If it is 1, the process proceeds to step S23, and if ST is not 1, step S24.
Proceed to.

That is, if ST = 1, it means that there is a microphone input. Therefore, in step S23, performance channels are assigned from channels other than the channel assigned as the microphone channel, and the assigned channel number is stored in the register i. To step S2
Go to 5. If ST = 1 is not set, there is no microphone input.
Performance channels are allocated from all 16 channels, the allocated channel numbers are set in the register i, and the flow advances to step S25. In the processing of steps S23 and S24, if the channel to be assigned a channel is sounding, a truncation process is performed to determine the channel of a sound having a lower priority, for example, the sound that is sounded first. .

When the channel numbers of the performance channels assigned as described above are set in the register i, various data such as note number NN and effect control are set in various registers of the i channel of the sound source 9 in step S25.
In step S26, note-on is output to the i channel, and the process ends. This note-on event process is also executed at the timing of the note-on event when the automatic performance data is reproduced. When this process ends, the process returns to step S2 of the main routine that called this process, and subsequently executes the process of the main routine. Through the above processing, a musical tone based on the performance information is generated.

In the microphone processing of FIG.
At step 31, the state of the peak detector 8 is fetched via the parallel I / O 6, and it is determined at step S32 whether or not there is a microphone input. If there is a microphone input, the process proceeds to step S33,
If there is no microphone input, the process proceeds to step S39.

If there is a microphone input, step S33
Resets the counter register CNT at step S3
At 4, it is determined whether or not ST = 1. Here, at the time of step S34, this flag ST holds the state of the microphone input at the time of executing the microphone processing last time. If ST = 0 in step S34, it indicates that the state where there was no microphone input has now been changed to the state where microphone input is present, and therefore, step S35
In step S38, microphone channel assignment and microphone input start (sound generation) processing are performed.

That is, in step S35, the flag ST is set to "1". In step S36, a microphone channel is allocated according to predetermined conditions described later, and the channel number is set in the register Mch. Go to step S37. In step S37, the setting for the microphone channel is performed in the various registers of the Mch channel of the sound source 9 by the method described in detail above, and in step S38, note-on is output to the Mch channel, and the process ends. On the other hand, if ST = 1 in step S34, nothing is executed and the microphone processing ends.

If there is no microphone input in step S32, it is determined in step S39 whether or not ST = 0.
If ST = 0, it means that the state where there is no microphone input is continued, so that the process is terminated and the process returns to step S2 of the main routine. On the other hand, if ST = 0 is not satisfied (ST = 1), it is immediately after the microphone input is lost, so that the microphone input voice that is sounding is muted in steps S301 to S304.

That is, in step S301, the counter register CNT is incremented, and in step S302
It is determined whether or not CNT ≧ n. If CNT ≧ n, since the predetermined time has not elapsed since the microphone input disappeared, the process is terminated as it is, and the process returns to step S2 of the main routine. If CNT ≧ n, it means that the predetermined time has elapsed, so that the flag ST is reset to “0” in step S303, and the Mch is reset in step S304.
The channel is muted, and the process returns to step S2 of the main routine. Through the above processing, sound generation and mute are performed by the microphone input. Here, after a predetermined time elapses after the microphone input is lost, the microphone channel is terminated. This is so that even when the external input is interrupted for a short time, the channel is not released and is continuously used as a microphone channel.

FIG. 5 is a diagram showing how microphone channels are allocated. The first to third embodiments will be described with reference to FIG. 5A shows a synchronization signal, FIG. 5B shows a conversion completion signal in the A / D conversion circuit 11, and FIG. 5C shows a timing of a channel in the sound source 9. (D), (e), and (f) show candidate channels assigned as microphone channels in the first to third embodiments.

In the first embodiment, one predetermined channel, that is, the sixteenth channel is fixedly assigned as a channel for the microphone channel. In the case of the first embodiment, when allocating a microphone channel, if the 16th channel is an empty channel, it is allocated as it is as a microphone channel, and if the 16th channel is not an empty channel, mute processing is performed to secure a channel. And assign it as a microphone channel.

On the other hand, when a performance channel is allocated, a performance channel is allocated from all of the first to sixteenth channels when there is no microphone input, and a performance channel is allocated from the first to fifteenth channels when there is a microphone input. . If the microphone channel is determined in advance, control is simplified.

In the case of the second embodiment, as shown by the dashed line in FIG.
A latch circuit L for latching the output of the D change circuit 11 is provided, and all of the first to sixteenth channels are used as microphone channel candidate channels. That is, A / D
Although there is a certain time lag until the A / D conversion is completed in the conversion circuit 11, the previous external waveform data subjected to the A / D conversion is latched in the latch circuit L by the synchronization signal, and the latched external waveform data is latched. Assign channels as follows.

When allocating a microphone channel, of all the first to sixteenth channels, the truncation is performed from an empty channel if there is an empty channel, or from the priority of the tone being sounded if there is no empty channel. Go to secure a channel and assign that channel as a microphone channel.

On the other hand, when a performance channel is allocated, the performance channels are allocated from all of the first to sixteenth channels when there is no microphone input, and the performance channels are allocated from channels not allocated as microphone channels when there is a microphone input. Assign. As described above, when all channels are set as candidate channels for the microphone channel, when a musical tone is muted by a microphone input, the musical tone can be muted from a low priority order, thereby minimizing the influence of the performance information on the musical tone. it can.

The circuit of the sound source 9 may be changed so that the synchronizing signal is generated in synchronization with the timing of the microphone channel instead of the sound channel. In this way, all channels can be used for microphone input without providing the latch circuit L.

In the third embodiment, the A / D conversion circuit 11
The first to sixteenth bits after the D completion signal are set as candidate channels for the microphone channel. That is, A /
The D conversion circuit 11 latches and outputs the converted external waveform data at the timing of the A / D completion signal, and allocates channels to the latched external waveform data after the conversion as follows.

That is, when allocating a microphone channel, of the first to sixteenth channels, an empty channel or a channel secured by truncation is allocated as a microphone channel. 1st to 1st
Performance channels are allocated from all six channels and from channels not allocated as microphone channels when there is a microphone input. As described above, when the microphone channel is allocated from the channel after the completion of the conversion by the A / D conversion circuit 11, the influence on the musical tone muted by the microphone input can be suppressed to some extent.
There is no delay of one sample time as in the second embodiment. It should be noted that there is substantially no problem even if one sample time is delayed as in the second embodiment.

As described above, the effects imparted to the tone waveform data read from the waveform memory 10 by the sound source 9 include pitch conversion, digital filter processing, volume control processing, modulation of amplitude, pitch, timbre, etc. Although the effects of processing, mixing, reverb processing, non-linear conversion processing, and the like are obtained, as in the above embodiment, the sound source 9 itself handles external waveform data input from the microphone in the same manner as tone waveform data in the waveform memory 10. With this configuration, various effect controls of the sound source 9 can be easily given to the sound input to the microphone.

Further, in the above embodiment, the analog input signal of the microphone 5 is mixed with the analog output signal by the adding circuit 15. The reverberation sound component of the waveform input from is generated, and the direct sound component is to be supplied from a line directly going to the addition circuit 15. By directly mixing the analog input signals, there is no delay in the rise of the sound or the like due to the microphone input, and clear sound reproduction by the direct input sound can be performed. In addition, the fact that the direct sound component does not pass through the microphone channel means that the level of the external tone signal of the microphone channel can be reduced accordingly, and the dynamic range of the final tone signal of the sound source 9 can be expanded accordingly.

It should be noted that if only an effect is given to the sound generated from the analog input signal input to the microphone, it is not necessary to directly mix the sound.

When channels are assigned to musical tones according to performance information, important sounds such as the highest sound of simultaneously played sounds and the base sound of automatic accompaniment may be assigned as channels for external waveform data. Control may be performed so that a certain channel is not allocated as much as possible.

Further, when the present invention is applied, whether or not external waveform data is input to the sound source may be set by a switch or the like. Further, it may be detected that the mixing ratio of the reverberation component to be applied is very small, and in that case, even if the level of the microphone input rises, the external waveform data may be controlled so as not to use the channel of the sound source.
That is, according to the level of the external tone signal output from the microphone channel, the microphone channel may be released (not set) when the level is low.

In the above embodiment, the case where external waveform data is input from a microphone has been described. However, the present invention is not limited to this, and external digital data may be input. In that case, a detection circuit for detecting the presence or absence of input of digital waveform data may be provided instead of the peak detector 8. That is, the present invention can be generally applied to a case where external waveform data is supplied from outside the sound source using the data bus of the waveform memory.

Although the above embodiment has been described with reference to the case where a musical tone is generated based on performance information input from a MIDI interface, it is necessary to connect a sequencer, an electronic keyboard instrument, a computer, and the like to the MIDI interface. The performance information is input from various input devices. The performance information may be input directly from the keyboard, or may be information that is stored in a memory or the like and read out.

[0047]

According to fillable waveform memory type musical tone generating apparatus external waveform of claim 1, as described above, according to the present invention, as well as input to the sound source to supply a digital external waveform data from an external waveform supply means, Based on the performance information input from the performance information input means, the tone waveform data is read from the waveform memory and input to the sound source. At least one channel of the tone source is assigned by the external waveform channel assignment means and the tone waveform channel assignment means. Assignment can be made to either input of external waveform data or reading of tone waveform data from the waveform memory, and when the input of external waveform data is detected, the channel of the input sound of the external waveform data is assigned. Generated by the sound source by the decoding means
Address signal assigned to the external waveform supply means
Is supplied from the external waveform supply means.
Input external waveform data to the sound source and assign it to the waveform memory.
If the address is
Control so that the detected tone waveform data is input to the sound source.
By that, the musical tone generation by tone generator and an external waveform data by the performance information. Thus share sound source, the waveform memory type tone waveform apparatus such as an electronic musical instrument, a simple circuit structure, the external input waveform Processing for effect control of a sound source can be performed. In addition, in the present invention,
The microphone channel is set only when there is an external waveform input, so if there is no external waveform input,
Accordingly, the performance can be performed by the performance information with a large number of simultaneous sounds. On the other hand, when a waveform is input from the outside, the microphone channel can be processed correspondingly immediately. That is, a limited number of channels can be used more effectively.

Further, the external waveform of claim 2 can be inputted.
According to the waveform memory type tone generator , as in the first aspect,
By sharing the processing function of the sound source with external waveform data,
Processing of sound source effect control on external input waveform depending on path configuration
And input sound of external waveform data.
Channel is a free channel or truncation
Channel allocated by the
When the input sound of the partial waveform data is sounded,
The effect on the environment can be minimized.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electronic musical instrument showing an embodiment of the present invention.

FIG. 2 is a flowchart of a main routine of a control program according to the embodiment.

FIG. 3 is a flowchart of a note-on event processing routine in the embodiment.

FIG. 4 is a flowchart of a microphone processing routine according to the embodiment.

FIG. 5 is a diagram showing first to third examples of how to allocate microphone channels in the embodiment.

[Explanation of symbols]

1 CPU, 4 MIDI interface, 5 microphone, 8 peak detector, 9 sound source, 10 waveform memory,
11 A / D conversion circuit, 12 driver circuit, 13 decoder, 14 D / A conversion circuit, 15 addition circuit.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-5-346782 (JP, A) JP-A-63-278426 (JP, A) JP-A-2-235260 (JP, A) JP-A-6-278260 274188 (JP, A) Japanese Utility Model 3-81998 (JP, U) Japanese Utility Model 5-55200 (JP, U) Patent 3060920 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) G10H 1/00-7/12

Claims (2)

(57) [Claims] 1. A performance information input means for inputting performance information; a waveform memory storing digital musical sound waveform data; an external waveform supply means for supplying digital external waveform data; Go to each channel
During processing, address signals are generated independently and
A sound source that inputs shape data, performs predetermined arithmetic processing on the waveform data in a channel assigned to the input waveform data to generate a musical tone, and an input sound based on external waveform data supplied from the external waveform supply unit. External waveform channel allocating means for allocating a channel of the sound source in accordance with a predetermined condition as a channel for generating; and a channel for generating a musical tone corresponding to performance information input from the performance information input means. Musical tone waveform channel allocating means for allocating channels, wherein channels are allocated to the performance information from all channels when the channel of the input sound is not allocated, and other channels are allocated when the channel of the input sound is allocated. Assign a channel from the channel to the above performance information A sound source waveform channel assigning means for applying the address signal generated by the sound source is the external waveform supplied
If the address is assigned to the means,
The external waveform data supplied from the
Source and the address assigned to the waveform memory
, The tone wave read from the waveform memory
Decode for controlling shape data to be input to the sound source
Means for assigning at least one channel of the sound source to one of the input of the external waveform data and the reading of tone waveform data from the waveform memory, and the input of the external waveform data upon detecting allocates channels of the input sound of the external waveform data, each channel
The channel assigned to the tone waveform data during channel processing
In the case of a channel, the address assigned to the waveform memory
Output to the external waveform data.
Channel, the channel assigned to the external waveform supply means
By outputting the dress, the sound source is assigned to the sound source by sharing the sound source for the generation of the sound by the performance information and the sound waveform data and the generation of the input sound by the external waveform data. A waveform memory type tone generator capable of inputting an external waveform. 2. Performance information input means for inputting performance information.
And a waveform memory that stores digital musical sound waveform data
And external waveform supply means for supplying digital external waveform data
And time-division processing on multiple channels to
The waveform data in the channel assigned to the
To a sound source that generates a musical tone by performing predetermined arithmetic processing on the external waveform data supplied from the external waveform supply unit.
As a channel for generating input sound
An external wave that assigns the sound source channel according to conditions
Channel assignment means and performance information input from the performance information input means.
As a channel for generating musical tones
With sound waveform channel assignment means to assign channels
And the channel of the input sound is not assigned
Channel from all channels to the above performance information
Assigned to the input sound channel.
The performance information above from other channels.
Sound source waveform channel allocating means for allocating channels
And inputting the external waveform data to the channel of the sound source.
Reading the tone waveform data from the waveform memory;
And the external waveform
When data input is detected, an empty channel
Channel or channel secured by truncation.
Assign as the channel for the input sound of the external waveform data
Thus, the performance information and the musical tone waveform data
Sound generation, and input sound generation by the external waveform data.
, The channel of the sound source is assigned and the sound source is
A waveform memory type tone generator capable of inputting an external waveform, characterized by being shared .