JPH0115878B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic musical instrument that generates musical tones by reading out digital waveform signals digitally recorded in waveform storage means.

[Background of the invention]

Traditionally, PCM (Pulse Code Modulation)
Electronic musical instruments have been developed that generate musical tones by reading out digital waveform signals digitally recorded using various modulation methods.

However, when performing a keyboard split in such a conventional electronic musical instrument, the performance that can be performed in the keyboard split state is only limited, and further improvements have been desired.

[Purpose of the invention]

The present invention was made to solve the above problems, and an object of the present invention is to provide an electronic musical instrument capable of more flexible keyboard splitting.

[Key points of the invention]

This invention uses musical scales, key touches, etc. as at least two-dimensional parameters to determine which digital waveform signal to read out at what reading speed among a plurality of digital waveform signals each associated with a specific pitch, The key point is that it is determined based on the magnitude of the at least two-dimensional input parameters and a specific pitch to which the digital waveform signal is associated. is used as a two-dimensional parameter, and depending on the magnitude of the input two-dimensional parameter and the specific pitch to which the digital waveform signal is associated, which digital waveform signal among the plurality of digital waveform signals is determined. The reading speed at which the data is read out is determined.

It goes without saying that the parameters used may be other types of parameters than musical scales and key touches, and the number of digital waveform signals to be read may be two or more.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail. FIG. 1 shows the circuit configuration of this embodiment. In the figure, reference numeral 1 denotes an operation switch panel section, which is provided with various switches as well as input terminals and a display device.
Then, from the outside, the external sound is converted into a voltage signal by a microphone, etc., and inputted to the microphone in (MIC IN) terminal.Conversely, from this embodiment device, a scale tone signal (acoustic signal) is output via the output (OUT PUT) terminal.

Further, as will be described later, a command signal (trigger signal) for instructing to start recording a signal input via the microphone in terminal is inputted from the outside via the trigger in (TRIG IN) terminal. Furthermore, keyboard signals or control signals and data from a personal computer or the like are supplied via a MIDI in terminal. MIDI is a unified interface standard for connecting electronic musical instruments or personal computers and electronic musical instruments.
It is an abbreviation for Digital Interface.

Details of the operation switch panel section 1 shown in FIG. 1 are shown in FIG. 2. That is, in FIG. 2, reference numeral 2 is a power on/off switch that enables the apparatus of this embodiment to operate.

And the record (RECORD) section has the above-mentioned microphone in terminal 3 and trigger in terminal 4.
In addition, there is a signal level volume 5 that adjusts the level of the signal input from the microphone in terminal 3, and a signal level volume 5 that determines the level (trigger level) at which the external sound signal supplied from the microphone in terminal 3 automatically starts recording. The signal level is displayed on a level meter 7. This level meter 7 is for example
The signal level is displayed by displaying a bar graph on the LED.

Furthermore, the record section has a record (REC) switch 8 for switching to record mode, a clear (CLR) switch 9 for clearing already recorded signals, and a trigger (TRIG) for manually inputting a trigger signal by the performer. ) switch 10, and a cut (CUT) switch 11 for erasing unnecessary portions of the recorded signal, and these switches 8 to 11 have LEDs 8-1 to 11-1 that light up to indicate their operating status, respectively. It is installed internally.

The console (CONSOLE) section of the operation switch panel section 1 includes a tone set switch 12 that is operated to distinguish between multiple tones when they are recorded in one recording memory, as will be described later. is displayed on a tone LED 13 having a Japanese character segment,
The position and length of that area can also be determined using the tone map.
A bar graph is displayed on LED14. For example, this tone map LED 14 is divided into a number corresponding to the number of blocks of a recording memory, which will be described later. For example, the tone number of the tone set switch 12 increases each time it is operated.

This console section also has FINE switches 15, 15 and a COARSE volume 16, which are used to input various parameters. The display state of the VALUE LED 17 or the tone map LED 14 described above changes.

The fine switches 15, 15 are for instructing minute changes in a single operation, and are comprised of a switch (<) for instructing the direction in which the parameter increases, and a switch (<) for instructing the direction in which the parameter decreases. Further, if these switches 15, 15 are kept pressed, the values will change continuously. Further, the coarse volume 16 is used when changing parameters significantly.

The EDIT WAVE section of the operation switch panel has multiple switches that input signals that specify how to use or modify the waveform signal input and stored. The MASTER TUNE switch 18 changes the pitch (frequency) of the overall sound, and by operating this switch 18, the internal LED 18-1
is turned on, the fine switch 15,1 is turned on.
5. The actual frequency is determined using the coarse volume 16, and the display at this time is performed on the value LED 17, for example, the value corresponding to the frequency is displayed digitally, and tuning is performed.

A tone pitch switch 19 becomes effective when a plurality of tones are recorded, and determines the pitch for each tone. Its operation method is the same as that of the master tune switch 18, and is performed by using the fine switches 15 and 15 coarse volume 16 when the LED 19-1 is turned on.

The general (GEN) start switch 20 and end switch 21 of the edit wave section are used to specify the start address and end address of the waveform generated as a musical tone.
When 20-1 and 21-1 are in the lighting state,
Fine switches 15, 15 and coarse volume 16 are used to display the tone map.
This is done using LED14 and Value LED17.

Also, repeat (REP) start switch 2
2. The end switch 23 is for specifying the start address and end address of a repeated portion for repeatedly reading out a portion of the stored waveform.
When the LEDs 22-1 and 23-1 are lit, the fine switches 15 and 15 and the coarse volume 16 are used, and the tone map LED 14 and the value LED 17 are used for display.

The vibrato speed, depth (DEPTH), and delay switches 24, 25, and 26 of the edit wave section determine the vibrato speed, depth, and delay time or presence/absence. , LED24-1,
25-1 and 26-1 are lit, and in that state, the fine switches 15, 15 and coarse volume 16 are operated to input each parameter. At this time, the status is displayed numerically on the value LED 17.

In addition, in this embodiment, it is possible to give a pre-recorded waveform an envelope different from its own envelope, and the attack (A) time, decay (D) time, sustain (S) level of the envelope, Each switch 27, 28, 2 is set to the mode for inputting the release (R) time.
When operations 9 and 30 are performed, the internal
LED27-1, 28-1, 29-1, 30-1
lights up, and by using the fine switches 15, 15 and coarse volume 16, each parameter can be input digitally. In addition, at that time, the value of each parameter is displayed on the value LED 17.

In addition, in this embodiment, the relationship between the keyboard of the connected keyboard instrument and the output musical tone can be variably set, and the center (CENTER) switch 3
1 determines which position (scale) on the keyboard the recorded external sound should correspond to, the WIDTH switch 32 determines the sound production area on the keyboard for the sound, and the TOUCH The switch 33 determines the sound production range of the sound according to the key touch (speed), and when each switch 31, 32, 33 is operated, the LED 31
-1, 32-1, and 33-1 are lit, and in this lit state, fine switches 15, 15 and coarse volume 16 are used.

That is, when the center switch 31 is operated, the fine switches 15, 15 and the coarse volume 1
By performing step 6, you can change the scale name to be associated with the variable.
The numerical value is displayed on LED17, and with switch 32
When operating, the upper and lower limits of the scale to which the note is assigned are displayed on the value LED 17, for example, in four digits such as H**** or L****. Note that input switching between the upper limit and the lower limit is performed by continuous operation of the with switch 32.

When the touch switch 33 is operated, the fine switches 15, 15 and coarse volume 16 are operated to determine the upper and lower limits of the key touch to which the sound is assigned, H*** or L***
The input level is displayed on the value LED 17. Note that the input switching between the upper limit and the lower limit is performed by continuous operation of the touch switch 33.

There is a play switch 34 in the midi section of the operation switch panel section 1, and when this operation is performed, the built-in LED 34-1 lights up and follows the keyboard signal, touch data, etc. input from the outside via the midi-in terminal 35 mentioned above. Perform.

Also, the check switch 36 has the tone LED 1
The sound displayed in 3 is automatically produced, and the user can hear how it was input and stored, and its status is displayed on the LED 36-1.

The output terminal 37 is used when the play switch 34 is operated or when the check switch 36 is operated.
During operation, the output scale tone signal is sent to an external amplifier and speaker.

This operation switch panel section 1 has a first
As shown in the figure, it is connected to the CPU 38 via a bus line ABUS. This CPU 38 is composed of a microprocessor and executes various processing controls to be described later.

This CPU 38 is connected via a bus line ABUS to a work memory 39 having a memory area used for controlling various processes. Also,
The CPU 38 is connected to waveform read/write control units 40-0 and 40-3 of four channels CH0 to CH3 via a bus line CBUS. These four channel waveform read/write control sections 40-0 to 40
-3 may have separate hardware, or may operate in four channels by time-sharing processing.

The four-channel waveform read/write controllers 40-0 to 40-3 are connected to the recording memory 4.
Give an address signal (ADDRESS) to 1 in a time-division manner via the bus line DBUS,
Data is exchanged with the recording memory 41 via the bus line EBUS. It also outputs read/write signals (R/W) to the recording memory 41 in a time-division manner.

Therefore, the waveform read/write control section 40-0~
40-3 can access waveform information in the same area or different areas by sending different address signals to the recording memory 41, and can write waveform information in one channel while writing waveform information in another channel. It is also possible to read out the waveform information using .

The recording memory 41 is, for example, 1.5 mega (M).
It has a bit memory, can be divided into 32 blocks, and can be used to digitally store waveform signals, such as PCM recording.

Then, the external sound signal input via the microphone in terminal 3 of the operation switch panel section 1 is sampled and given to the A/D converter 42, which converts it into a digital signal and forms the above waveform. Read/write control units 40-0 to 40-3 (actually, as described later, waveform read/write control units 40-0 and 40 corresponding to channels CH0 and CH1
-1) and recorded in an appropriate address area of the recording memory 41.

In addition, waveform read/write control units 40-0 to 40-4
The digital signal read out and output from the recording memory 41 at 0-3 is given to a D/A converter 43 in a time-divisional manner, converted to an analog signal, and then sent to a sample and hold (S&H) circuit 44-0. ~44-
given to 3. That is, the sample and hold circuits 44-0 to 44-3 sample and hold the waveform signals output from the waveform read/write control units 40-0 to 40-3 in a time-divisional manner and for each channel.

Then, each sample hold circuit 44-0 to 44-4
The output of 4-3 is at VCA45-0 to 45-3,
The signal is subjected to amplitude envelope control and sent to a mixing circuit 46. That is,
The VCAs 45-0 to 45-3 are supplied with an envelope control signal given from the CPU 38 after being converted into a voltage signal by the D/A converter 47.
Perform envelope control. Note that there are four D/A converters 47, and each VCA 45-0 to 45
-3 is arranged correspondingly.

The signals mixed by the mixing circuit 46 are outputted via the output terminal 37 of the operation switch panel section 1.

Next, the operation of this embodiment will be explained. First of all,
The operation of record mode will be explained.

<Record mode> Enable external sound signals to be input from the microphone in terminal 3, operate the record switch 8, and enter the record preparation state. That is, in the record preparation state, as shown in FIG. 3, an external sound signal is repeatedly input and recorded in the last block of the recording memory 41 (the area between . record external sound signals. The following areas will be referred to as delay trigger areas. When entering this record mode, LED 8-1 lights up.

In this state, when a trigger is applied, recording actually begins. There are three ways to apply this trigger, one is auto trigger (Auto Trigger)
Trigger level volume 6
When the external sound signal exceeds the reference level set in , a trigger signal is generated. The second type is operated by an external trigger signal input through the trigger-in terminal 4, and the third type is operated by the operator himself by operating the trigger switch 10 to generate the trigger signal. The second method is called an external trigger, and the third method is called a manual trigger.
Note that the first trigger method and other trigger methods are, for example, trigger level volume 6.
A range to which no auto-trigger is added is provided, and when the trigger level volume 6 is located at such a position, only the second and third trigger methods are employed.

When a trigger signal is generated by any of the three trigger methods mentioned above, the LED
10-1 lights up.

The operation of the CPU 38 in this record mode will now be explained with reference to FIG.

First, when the record switch 8 is operated, the process proceeds to step _S1 , and the CPU 38 selects the channel CH.
For the waveform read/write control unit 44-0 of 0,
Set the address shown in FIG. 3 as the recording start address, set the address as the loop start address, set the address as the loop end address, and set the loop on state. That is, the waveform read/write control section 44-
0 (same for the waveform read/write control units 44-1 to 44-3 of other channels) is the recording memory 4.
One specific address area can be read/written repeatedly, and in the loop-on state, addresses can be repeatedly specified from the loop start address to the loop end address.

Thereafter, the process proceeds to step _S2 , where a command is given to the waveform read/write control section 44-0 of channel CH0 via the bus line CBUS to start recording. Therefore, the external sound signal input through the microphone-in terminal 3 is sampled, converted into a digital signal by the A/D converter 42, and sequentially written into the recording memory 41. FIG. 5A shows this state, in which the external sound signal is repeatedly recorded in the delay trigger area (the area from the address). Note that when recording is repeated in the same area, previously stored signals are erased and only the latest input signal is recorded. For example, an external sound signal of 100 msec is recorded in this delay trigger area. By pre-recording an external sound signal in this delay trigger area, the actual start of the subsequent recording becomes natural.

Next, proceeding to step _S3 , the address shown in FIG. 3 is set as the recording start address and the address is set as the recording end address for the waveform read/write control section 40-1 of channel CH1. Of course, the recording start address and recording end address can be set arbitrarily and variably.

Then, the process proceeds to step _S4 , where it is checked whether a trigger signal has been input by any of the above-mentioned auto trigger, external trigger, or manual trigger methods, and if it is determined No, this Step _S4 is repeatedly executed, and if a trigger signal is input, a YES determination is made and the process proceeds to the next step _S5 .

In this step _S5 , the waveform read/write control section 40-0 of channel CH0 is made to stop recording. For example, address advancement stops at the position indicated by CH0 in FIG. 5A.

Then, a command is sent to the waveform read/write control unit 40-1 of the channel CH1 via the bus line CBUS to start recording. In this case, recording starts from the address shown in Figure 3. Then, the process proceeds to step _S6 , where it is checked whether the _address specification of the waveform read/write control section 40-1 has been made up to the position shown in FIG. When the address is reached, a Yes judgment is made and the process proceeds to the next step _S7 .

That is, in this step _S7 , the data in the delay trigger area is transferred to a predetermined area of the work memory 39, as shown in FIG. 5B. In this case, since the data in areas D to F in the figure was recorded before the data in areas A to C, data D to F are transferred first, and then data A to A are transferred. Transfer C and change the order of the array,
Thereafter, in the state shown in FIG. 5C, the recording memory 4
Record in the first block of 1, that is, area ~. As a result, the external sound signal is digitally recorded in the area ~ in this recording memory 41.

To cut unnecessary parts of the data recorded in this way, press the cut switch 11.
This is done by operating the fine switch 15 or course volume 16 while the LED 11-1 is lit. In addition, due to the tone map LED14,
The memory position and length of the sound are displayed, and the display state changes each time a cutting operation is performed to display the storage area.

The above was a case where a single tone signal was input to the recording memory 41, but the tone set switch 12
By changing the tone number, you can input different tones continuously.

That is, at that time, the CPU 38 specifies the recording start address and the recording end address as appropriate for the waveform read/write control units 40-0 and 40-1, and causes them to record. In this way, the state in which the waveform information of tones 1 to 5 is stored is stored in the sixth
The figure shows. Then, each time the tone set switch 12 is operated, the tone number changes and the tone
The LED 13 displays the numerical value, and the tone map LED 14 displays the storage area of the sound.

Then, by operating the clear switch 9, the waveform information of the number displayed on the tone LED 13 and subsequent numbers will be erased. Therefore, for example, when "3" is displayed on the tone LED 13, operating the clear switch 9 erases tones 3 to 5 from the recording memory 41, making it possible to record a new external sound signal. become able to.

The signals input in this manner are read out by the CPU 38 instructing the waveform read/write control section 40-0 to sequentially access them by operating the check switch 36.
The signal is converted into an analog signal via the D/A converter 43, amplified appropriately by the VCA 45-0, and then outputted from the output terminal 37 for sound generation. Therefore, the recording status can be checked.

<Edit Wave Mode> Next, a description will be given of the operation of variously changing the waveform signal inputted in this manner to obtain a waveform signal for an actual output musical tone signal.

FIG. 7 shows a state in which data related to the external sound signal recorded in the recording memory 41 is stored in a specific address area of the work memory 39.

That is, each piece of data is stored in the order of tone number. For example, in the tone 1 area, the following data is stored in the work memory 39 under the control of the CPU 38.

First, start block number (START
BLOCK #) specifies the first block in which the tone 1 waveform is stored, and the end block number (END BLOCK #) specifies the last block in which the tone 1 waveform is stored.
Based on these two pieces of information, the tone map LED 14
is displayed.

The next data, that is, the general start block number (GEN START BLOCK #), specifies the block address at which actual sound generation starts, and the next general start address (GEN START BLOCK #) specifies the block address at which the actual sound starts.
START ADRS) specifies the lower address within the block. This value is set after the general start switch 20 is operated, the fine switches 15 and 1
5 and a course volume of 16.
FIG. 8 shows such a situation, where the general start position can be anywhere in the storage area of tone N.

Also, the next general end block number (GEN END BLOCK #) and general end address (GEN END ADRS) are set by fine switch 1 after operating general end switch 21.
5, 15 and a course volume of 16. FIG. 8 further shows that the position of the general end inputted in this way can be taken freely.

Also, the repeat start block number (REP START BLOCK) stored in the next area
#), Repeat start address (REP
START ADRS) is set using the fine switches 15, 15 and coarse volume 16 after operating the repeat start switch 22, and is the start when repeatedly accessing a specific area of stored waveform information. Specify the location. Similarly, the repeat end block number (REP END BLOCK #) and repeat end address (RES END ADRS) can be set by turning the fine switch 1 after operating the repeat end switch 23.
5, 15 and coarse volume 16, and specifies the end position of a specific area of waveform information.

This state is as shown in FIG. 9, and during actual performance, waveform information is transmitted to the waveform read/write control unit 4 from the general start (GEN START) position to the repeat start position.
0-0 to 40-3 are accessed, and then the waveform information is repeatedly accessed a predetermined number of times from the repeat start position to the repeat end position, and then the waveform information is accessed from the repeat end position to the general end position. The repeat end position may be passed, for example, at the time when a performance key on the keyboard is turned off. The operation when setting the general, repeat start address, and end address will be described further later.

The tone pitch (TONE PITCH) stored in the work memory 39 in FIG.
5. Set by operating the course volume 16, and reflecting this setting information and setting information by operating the master tune switch 18, the frequency of the 12-tone scale of a specific octave of PITCH C# to C in FIG. Information is determined.

The KEY BOARD CENTER of the work memory 39 is set by operating the keyboard center switch 31, fine switches 15, 15, and course volume 16, and determines which scale the recorded external sound signal is placed on. Decide whether to match. The correspondence relationship is displayed numerically on the value LED 17. According to this keyboard center setting, pitch
The information from C# to C changes and can provide a transposition function.

That is, for example, if the frequency of the external sound signal is f ₁ , the scale specified at the keyboard center will have the frequency f ₁
By changing the keyboard center, you can variably set which scale has the frequency f ₁ .

Then, according to this keyboard center setting, each pitch can be changed by rewriting the contents of pitches C# to C in Figure 7, or by changing the correspondence with the scale when this information is actually read out. The frequency of the scale is set.

Next, Keyboard with Row (KEYBOARD
WIDTH L) and keyboard width high (KEYBOARD WIDTH H) are set by operating keyboard width switch 32 and fine switch 1.
5, 15 and coarse volume 16, and the usage range of the note is set in correspondence with the scale note. Note that the keyboard center, keyboard with low, and high may be controlled by operating a performance key of a keyboard connected via the midi-in terminal 35.

The next key touch low (KEY TOUCH L) and key touch high (KEY TOUCH H) are set using the fine switches 15, 15 and coarse volume 16 after operating the key touch switch 33, and are set by using the fine switches 15, 15 and the coarse volume 16. is set according to the key touch (speed). At this time, values indicating the upper and lower limits are displayed on the value LED 17.

After operating the envelope attack, decay, sustain, and release switches 27 to 30, the envelope attack (ATT), decay ( DEC),
Sustain (SUS) and release (REL) information are set.

In addition, vibrato information and the like are input into the memory area of tone 1, but their explanation will be omitted.

Next, the general start address mentioned above,
The operation when detecting the end address, repeat start address, or end address will be explained in detail. That is, the level of the waveform information changes with time as shown in FIG. 10, and when the generation or termination of a waveform is specified at an arbitrary point, a noise called a click sound is output. Therefore, it is necessary to detect a so-called zero crossing point that passes through the zero level and use that address as a general start address, end address, repeat start address, or end address.

Figure 11 shows the processing, and the CPU 38
is from the recording memory 41 to the fine switch 1.
5, 15 or the course volume 16, the waveform information is read out and the zero cross point is detected.

This figure 11 shows the flow when moving to the side where the address increases.The polarity flag is turned off at step _T1 , and then the polarity flag is turned off at step _T2 .
Pointer in CPU 38 (this is recording memory 4
1 address is specified and changes in synchronization with the address counter of the waveform read/write control unit 40-0. ) is incremented.

Then, in step _T3 , it is checked whether the data at the address indicated by the pointer is a negative value or not, and if the determination is yes, the process proceeds to step _T4 and the polarity flag is turned on. This polarity flag turns on when the amplitude value of the waveform takes a negative value.
Turns off when a positive value is taken.

Then, following this step _T4 , the process proceeds to step _T2 and the same operation is repeated. If the data specified by the pointer is positive, step _T3
The determination is No, and the process proceeds to step _T5 , where it is checked whether the polarity flag is in the on state.

When the polarity flag is off, that is, when positive amplitude values are continuously read, the step
The determination at _T5 is No, and the process moves to step _T6 , where the polarity flag is turned off.

Further, step _T5 makes a Yes judgment when the amplitude value of the previous pointer is negative and the amplitude value of the current pointer is positive, and it is when the pointer has just passed the zero crossing point.

In that case, step T ₅ is followed by step T _7.
Execute the process. In step _T7 , it is determined whether the current amplitude value data of the pointer is less than or equal to a predetermined value Δ. That is, as shown in Fig. 10, a Yes judgment is made at step _T5 near the zero-crossing point of the waveform, but if the address point is not actually small, that is, if it is not smaller than the predetermined value △, a clicking sound will be produced. Therefore, the zero-crossing point detection process becomes meaningless. Therefore, if a No judgment is made at step _T7 , the steps will continue until the next zero crossing point.
The processes from T ₁ to T ₆ are executed repeatedly. If Yes is determined in step _T7 , the series of processing ends, and the CPU 38 stores the value of the pointer at that time as the general start address, end address, repeat start address, or end address, and stores it in the work memory 39. write to.

FIG. 11 shows the processing of the CPU 38 when the address changes in the positive direction, but conversely, when the address changes in the negative direction, step _T1
At step T ₁ ′ corresponding to step T 1 ′, the polarity flag is turned on, and at step T ₃ ′ corresponding to step T ₃ , it is checked whether the data of the pointer is positive or not.
At step _T4 ' corresponding to step _T4 , the polarity flag is turned off, at step T5' corresponding to step _T5 , the polarity flag is turned off, and at step _T4 , the polarity flag is turned off.
The polarity flag may be turned on at step T ₆ ' corresponding to T ₆ , and the other steps T ₂ and T ₇ may be performed in the same manner.

<Play Mode> Next, the operation in the play mode in which the play switch 34 is operated and a performance is performed according to a signal input from the midi-in terminal 35 will be described below.

Note that, for example, tone 1 is stored in the recording memory 41.
It is assumed that .about.4 different waveform information are recorded, and that information as shown in FIG. 12 is input as each data of keyboard center, keyboard with low, high, key touch low, and high in the work memory 39.

That is, this FIG. 12 schematically shows the data of each of tone 1 to tone 4.
The keyboard center is C ₃ (the subscript indicates the octave number, the same applies hereafter), and the keyboard width is C ₃
~B ₃ , the key touch is 0-127.

Similarly, the keyboard center for Tone 2 is C ₄
So, the keyboard width is G ₃ # ~ C ₆ , the key touch is 20 ~ 80, the keyboard center of tone 3 is A ₅ , the keyboard width is C ₅ ~ B ₅ , the key touch is 81 ~ 127, and the tone The keyboard center of 4 is A ₄ , and the keyboard width is F ₄ # ~ B ₄
The key touch range is 0 to 120.

Then, according to step U ₁ in Figure 13, the CPU 3
Step 8 inputs "1" into the flag register (hereinafter referred to as tone number register) that specifies the tone number (TONE #),
Next, proceed to step U ₂ and connect the midi-in terminal 35.
The scale (NOTE) code input via
Check whether it is within the range specified by With-low and With-high of the tone 1 area of the work memory 39.

If a Yes determination is made in step _U2 , the process proceeds to step _U3 . In step U ₃ ,
It is checked whether the input key touch (KEY TOUCH) information input through the mid-in terminal 35 is within the range of key touch low and key touch high in the tone 1 area of the work memory 39.

If a Yes decision is made at step _U3 , the process proceeds to step _U4 , where the tone specified by the tone number register (i.e., tone 1 in this case) starts to be produced according to the scale code and key touch information. do.

That is, the CPU 38 transfers information specifying the general start position, end position, repeat start position, and end position from the corresponding area of the work memory 39 to any of the waveform read/write control units 40-0 to 40-3. or to the control unit of an unused channel. Further, the pitch information corresponding to the scale code is read from the work memory 39, converted as appropriate according to the octave information, and provided to the waveform read/write controllers 40-0 to 40-3 of the specified channel.

As a result, the waveform read/write control section 40-1
40-3 reads the waveform information of the designated area from the recording memory 41 at a speed according to the pitch information and supplies it to the D/A converter 43.

Then, the analog waveform signal output from the D/A converter 43 is sent to a sample hold circuit 44-0.
~44-3, then VCA45-0
~45-3. This VCA45-0~
45-3, the CPU 38 and the work memory 39
Envelope attack, DK, read from
Sustain and release data and digital information that changes sequentially in accordance with input key touch information are converted into analog voltage signals by one of the four D/A converters 47 and then provided. Therefore, the VCAs 45-0 to 45-3 not only apply a preset envelope, but also perform volume control in response to key touches.

This output signal is then sent to the mixing circuit 46.
The mixed signals are mixed at the output terminal 37 and output to the outside via the output terminal 37.

Now, in step _U4 of FIG. 13, the channel to be sounded, the scale, and the key touch are specified in this way, and the process proceeds to step _U5 .
It should be noted that even when the determination in steps U ₂ and U ₃ is negative, the process proceeds to step U ₅ .

Step _U5 is to increment the contents of the tone number register, and after this processing, the process advances to step _U6 , and the processing of steps _U2 to _U5 is completed for all tones, in this case, tones 1 to 4. If the judgment is No, proceed to step _U2 . Also, this step
If Yes is determined by U ₆ , midi-in terminal 3
The processing for the information input from step 5 is completed.
Therefore, whenever multiple keys are operated on the keyboard at the same time, the CPU 38 executes the flow shown in FIG.
CH3 waveform read/write control section 40-0 to 4
Assign output musical tones to 0-3 and generate them. Also, when a mute command is given from the midi-in terminal 35,
Execute the same process and stop the sound.

In the example shown in FIG. 12, for example, the information input from the midi-in terminal 35 is
If the key touch is 40 at C ₃ , tone 1
A musical tone is produced at a level of 40 key touches. Similarly, if the information input from the midi-in terminal 35 is _A3 and the key touch is 40, two tones, tone 1 and tone 2, are produced at the level of the key touch 40.

Also, if the information input from the midi-in terminal 35 is _C5 and the key touch is 100, tone 3 is
If the scale is the same and the key touch is 60, tone 2
is pronounced.

In this way, in this embodiment, it is possible to selectively use a plurality of pre-recorded waveform signals according to the range of the keyboard and the range of key touches, and it is possible to further enhance the functions of the conventional keyboard split. It is also possible to easily change the tone color by touching a key.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to determine which digital waveform signal is to be read out at what reading speed among a plurality of digital waveform signals representing arbitrary free waveforms each associated with a specific pitch. Since the value of at least two-dimensional parameters such as musical scales or key touches satisfies predetermined conditions and the pitch to which the digital waveform signal is associated, it can be determined by any arbitrary waveform. , complex keyboard splits can be performed, and traditional keyboard splits can be made more flexible.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a circuit diagram thereof, FIG. 2 is a diagram showing the operation switch panel of FIG. 1, and FIG. 3 is a diagram showing the contents and addresses of the performance memory. Figure 4 is a flowchart explaining the operation of record mode, Figure 5 is a state diagram when changing the arrangement of data recorded in the delay trigger area, and Figure 6 is a performance memory. State diagram when multiple tones are recorded in
FIG. 7 is a diagram showing the main part of the contents of the work memory in FIG. Figure 10 is a diagram to explain the order of address specification during play, Figure 10 is a diagram to explain zero-crossing points of a waveform, Figure 11 is a flowchart for detecting zero-crossing points, and Figure 12 is a diagram to explain the order of specifying addresses during play. , a diagram for explaining the keyboard of a plurality of tones and the allocation range of key touches, and FIG. 13 is a diagram showing a flowchart for explaining the operation in the play mode. 1...Operation switch panel section, 3...Mic in terminal, 4...Trigger in terminal, 8...Record switch, 9...Clear switch, 10...Trigger switch, 11...Cut switch, 12
...Tone set switch, 13...Tone
LED, 14...Tone map LED, 15, 15
... Fine switch, 16 ... Course volume, 17 ... Value LED, 20 ... General start switch, 21 ... General end switch, 22 ... Repeat start switch,
23... Repeat end switch, 31... Keyboard center switch, 32... Keyboard width switch, 33... Keyboard touch switch, 34... Play switch, 35... Midday in terminal, 36... Check switch, 37... Output Terminal, 38...CPU, 39...Work memory, 40-0 to 40-3...Waveform read/
Light control unit, 41... Recording memory, 42...
A/D converter, 43...D/A converter, 45-0
~45-3...VCA.

Claims (1)

[Claims] 1. Waveform storage means for storing a plurality of digital waveform signals representing a plurality of mutually different waveforms, each of which is associated with a specific pitch; and a plurality of digital waveform signals stored in the waveform storage means. condition determining means for determining conditions for selectively reading out the parameters in a plurality of areas surrounded by upper and lower limits of the at least two-dimensional parameters; and a performance input for inputting the at least two-dimensional parameters in accordance with a performance operation. and the at least two-dimensional parameters inputted from the performance input means should be read by determining which area among the plurality of areas determined by the condition determination means falls. a selection means for selecting a digital waveform signal; and at least one digital waveform signal selected by the selection means is specified by the above-mentioned specific pitch to which the digital waveform signal is associated and a performance operation. What is claimed is: 1. An electronic musical instrument comprising: reading means for reading at a speed determined based on a musical scale; 2. The electronic musical instrument according to claim 1, wherein the upper and lower limits of the at least two-dimensional parameters in the condition determining means can be set arbitrarily by the user. 3. The electronic musical instrument according to claims 1 and 2, wherein the at least two-dimensional parameters are a musical scale and a key touch.