JPH02160294A - Sampling device - Google Patents

Abstract

PURPOSE:To utilize memories efficiently and to decrease the number of necessary memories by storing digital signals of external sounds in one memory on a variable length basis. CONSTITUTION:An external sound storage means 41 samples the external sounds and stores them as the variable-length digital signals. A read means 46 reads the digital signals which represent the external sounds out of the external sound storage means 41. Therefore, the digital signals of the external sounds can be stored on a variable length basis. Consequently, the memories are utilized efficiently and the number of necessary memories can be decreased.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sampling device that samples input external sound and stores it as a digital signal. [Prior Art] Conventionally, one memory has one There is a sampling device that records external sounds.

[Disadvantages of conventional technology]

However, the above-described sampling device has the following two drawbacks.

■When storing multiple external sounds, multiple memories are required, which is disadvantageous in terms of implementation.

■One memory is used even when storing a short external sound, so the memory is not used efficiently.

[Object and main points of the invention]

The present invention aims to eliminate the above two drawbacks, and its main point is to enable one memory to store digital signals of a plurality of external sounds in variable lengths.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail.

Figure tx1 shows the circuit configuration of this embodiment, and 1 in the figure is an operation switch panel section, which is provided with input terminals and a display device in addition to each box switch. And from the outside,
External sound is converted into a voltage signal by turning on the microphone 47, etc., and is inputted to the microphone in (MICIN) terminal.Conversely, from this embodiment device, a scale tone signal (acoustic signal) is output to the outside. ) is output through the terminal.

Additionally, as will be described later, a command signal (Trigger No. 4a) that instructs an external command to start recording a signal input manually via the microphone in terminal is triggered in (TRIG IN).
) input through the terminal. Further, keyboard signals, 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.
Instrument* Digital Interf
It is an abbreviation of ace.

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.

On the other hand, the RECORD section is equipped with the above-mentioned microphone in terminal 3, trigger in terminal, and 4, as well as a signal level volume 4 that adjusts the level of the signal input from the microphone in terminal 3, and a signal level volume 4 that adjusts the level of the signal input from the microphone in terminal 3. A trigger level volume 6 is provided to determine the level (trigger level) at which to automatically start recording an external sound signal, and the signal level is displayed on a level meter 7. This level meter 7 is, for example, an LED
The signal level is displayed by displaying a bar graph.

Furthermore, the record section includes a record (R, E C) switch 8 for transitioning to record mode, a clear (CLR,) switch 9 for clearing already recorded signals, and a trigger signal manually input by the performer. Trigger (TRIG) switch lO Cut (CU T) switch 11 for erasing unnecessary parts of the recorded signal
Each of the switches 8 to 11 is provided with LEDs 8-1 to 11-1 that illuminate to indicate the operating state thereof.

CONSOLE of operation switch panel section 1
) section has a tone set switch 12-, which is operated to distinguish between multiple tones when they are recorded in one recording memory, as will be described later, and the tone number has 8 U-shaped segments. Tone LED13
, and the position and length of that area are displayed as a bar graph on the tone map LEDI 4. For example, this tone map LED 14 is divided into a number corresponding to the number of blocks of 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 has a FINE switch 15, 15, which is used for inputting various parameters, and a COAR8E volume 16.
By its operation, the display state of the VALUE LED 7 having a 4-digit 8-shaped segment or the tone map LED 14 described above changes.

Note that the fine switch 15.15 handles minute changes by 1
This is a switch that indicates the direction in which the parameter will increase (>) and a switch (<) that indicates the direction in which the parameter will decrease. In addition, these switches 15.
If you keep pressing 15, the value will change continuously. Further, the course volume 16 is used when changing parameters significantly.

Edit wave (EDIT) on the operation switch panel
WAVE) The safety controller mainly has a plurality of switches for inputting signals specifying how to use or modify the input and stored waveform signals, and the master tune (MA8TERTUNE) switch 18 controls the overall It changes the pitch (frequency) of the sound, and after the LED 18-1 is turned on by operating this switch 18, the actual frequency is determined using the fine switches 15, 15 and the coarse volume 16. The display at that time is performed by the value LBD 17, for example, by digitally displaying the value corresponding to 1M wave number,
Perform tuning.

Further, the tone pitch (TONE PITCH) switch 19 becomes effective when a plurality of tones (tones) are recorded, and determines the pitch for each tone. Its operating method is the same as that of the master tune switch 18, and when the LED 19-1 is lit, the fine switch 1
5,15, :! - This is done using the volume 16.

General (GEN) of the edited wave section
Start switch 20. The end switch 21 specifies the start address and end address of the waveform generated as a musical tone, and when the LEDs 20-1 and 21-1 are in the lit state □, the fine switch 15. The tone map LED 14 and the value LED 17 perform the display.

Further, the repeat (B/EP) start switch 22 and end switch 23 are used to designate the start address and end address of a repeated portion for repeatedly reading out a portion of the stored waveform.
1 are in the lighting state, fine switch 15,
15, the coarse volume 16 is used, and the display is performed using the tone map LED 14 and the value LED 17.

Edit wave section vibrato speed,
Depth (DEPTH), Day Rayno switches 24,
25 and 26 determine the speed, depth, and delay time or presence/absence of the vibrato. When each switch is operated, the LEDs 24-1, 25-1, and 26-1 light up, and in that state, the fine Operate the switches 15, 15 and course volume 16 to input each parameter. At this time, the state is numerically displayed in value LnD17.

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 (8) level of the envelope, When the respective switches 27, 28, 29 and 30 are operated to set the release (R) time input mode,
Inner thigh LED27-1.28-1.29-1.30
-1 lights up, and by using the fine switch 15, 15 and coarse volume 16, each parameter can be input digitally. Note that at this 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 (CBNTBR) switch 31 corresponds to which position (scale) on the keyboard the recorded external sound is placed. The WIDTH switch 32 determines the sound area on the previous keyboard, and the WIDTH switch 32 determines the sound area on the previous keyboard.
H) The switch 33 selects the previous sound range by key touch (
speed), and each switch 31.
When 32.33 is operated, LHD31 +1.32-
1.33-1 is 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 course volume 16 are operated to display the associated scale value on the value LED 17, and when the width switch 32 is operated, the upper and lower limits of the scale to which the previous note is assigned are displayed. For example, in value LBD17, H
It is expressed using 94 digits of ζ, such as *rice or L*rice.

Note that input switching between the upper limit and the lower limit is performed by continuous operation of the width switch 32.

Furthermore, when operating the touch switch 33, the upper and lower limits of the key touch to which the previous key is assigned are determined by operating the fine switches 15, 15 and the course volume 16.
Value IP3D1 above as US/US or L US/X US
7, the input level is displayed. In addition, the upper limit,
The lower limit input switching is performed by continuous operation of the touch switch 33.

There is a play switch 34 on the midi-seven kushijin of the operation switch panel section 1, and when this operation is performed, the built-in LED
34-1 lights up, and a performance is performed in accordance with keyboard signals, touch data, etc. input from the outside via the midi-in terminal 35 mentioned above.

Also, when the check switch 36 is activated, the tone displayed on the tone LED 13 is automatically produced. You can hear how the input was stored, and the status is displayed on the LED 36-1.

From the output terminal 37, the play switch 34 is connected.
or when the check switch 36 is operated, an output scale tone signal is sent to an external amplifier or speaker.

The operation switch panel section 1 is connected to the CPO 38 via a pass line ABU8, as shown in FIG. This CPU 38 executes various processing controls, which will be described later, using four micro processors.

This CPO 38 includes a work memory 39 having a memory area used for controlling various processes, and a pass line BB.
Connected via U8. In addition, 4 channels (CHONCH
3) Waveform read/write ill m section 40-0 to 40
-3 is connected. The four-channel waveform read/write controllers 40-0 to 40-3 may have separate hardware, or may operate on four channels by time-sharing processing.

The four-channel waveform read/write controllers 40-0 to 40-3 transmit the address signal (ADDRESS) to the recording memory 41 in a time-division manner to the pass line D.
The recording memory 41 and data (DA
TA) is exchanged via the pass line EBU8. It also outputs a read/write signal (R/W'') to the recording memory 41 in a time-division manner.

Therefore, waveform read/write control units 40-θ to 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 recording memory 41 has a memory of, for example, 1.5 mega (M) bits, and can be used by being divided into 32 memory blocks. It can be recorded.

Then, the external sound signal input through 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 section 40-0
~4O-3 (actually, channel CHO as described later)
, CHI is recorded in the area corresponding to the address.

Further, the digital signals read from the recording memory 41 and outputted by the waveform read/write control units 40-0 to 4°-3 are given to the D/A converter 43 in a time-divisional manner, and converted into analog signals. After being converted, it is applied to sample and hold (S&H) circuits 44-0 to 44-3. 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-o to 4o-3 in a time-divisional manner and for each channel.

Each sample hole)'Circuit 44-0 to 44-:
l') Output, VCA45-0 to 45-37 (T, amplitude envelope control is performed, mixing (MIXIN
G) sent to circuit 46; That is, VCA45-0 to 4
5-3 performs envelope control by converting the envelope control signal given from the CPU 38 into a voltage signal by the D/A converter 47 and supplying the same. In addition, this D/Af converter 47 is a 4Wi ant)cf) VCA45
-0 to 45-3 are arranged correspondingly.

The signal mixed by the mixing circuit 46 is
It is outputted via the output terminal 37 of the operation switch panel section 1.

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

<Record mode> Enable external sound signals to be input from microphone in terminal 3,
Operate the record switch 8 to enter the record preparation state. That is, in the record preparation state, as shown in Figure GA, an external sound signal is repeatedly input and recorded into the last block of the recording memory 41 (area from ■ to Q in the diagram) until a trigger signal is actually applied. The area from O to ■ in which external sound signals between 0 and 2 are recorded will be referred to as the delay trigger area. When the record mode is entered, the LED 8-1 lights up.

In this state, when a trigger is applied, recording actually begins. There are three ways to engage this trigger, one is the brim f.
-)) This is called an Auto Trigger, and when the external sound signal exceeds a reference level set by the trigger level volume 6, a trigger signal is generated. The second type operates by an external trigger signal input through the trigger-in terminal 4, and the third type generates a trigger signal by the operator himself operating the trigger switch 10. and the above 2
The second method is an external trigger (External trigger).
Trigger), and the third method is called Manual Trigger.

Note that the first one-way trigger type and the other one-way trigger types are defined as, for example, when the EVA trigger level volume 6 has a range in which the auto trigger is not added, and the trigger level volume 6 is located at such a position. teeth,
Only one type of the second and third triggers are used.

When a trigger signal is generated by one of the three trigger types described above, LEDlo-1 lights up.

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

First, when you operate the record switch 8, step S
1, the CPU 38 sets the address (■) shown in No. 31yJ as the recording start address for the waveform read/write control unit 44-O of channel CHO, sets the address (■) as the loop start address, and starts the loop. Set the end address to 00 address and set the loop on state. That is, the waveform read/write control unit 44-0 (the same applies to the waveform read/write controls 44-1 to 44-3 of other channels) can repeatedly read and write a specific address area of the recording memory 41. , in the loop on state, addresses are repeatedly specified from the loop start address to the loop end address.

And then, step S! Go to channel CH
A command is given to the waveform read/write control unit 44-O of O to start recording via the pass line CBUS. Therefore, the external sound signal inputted through the microphone input 1 and 3 is sampled, converted into a digital signal by the A/D converter 42, and sequentially written into the recording memory 41. @5 Figure (A) shows this state, in which the external sound signal is repeatedly recorded in the delay trigger area (area from addresses ① to ①). 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, this delay trigger area has 10 o m5ec
external sound signals will be recorded. By pre-recording an external sound signal in this delay trigger area, the actual start of the subsequent recording becomes natural.

Next, the process proceeds to step S3, in which the waveform read/write control viJ section 40-1 of channel CHI is set with the address (2) indicated by tlK3FA as the recording start address, and the address (2) as the recording end address. 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 judged whether or not a trigger signal has been input by any of the methods (auto trigger, external trigger, manual) described above. 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 Sg.

In this step Ss, the waveform read/write control section 40-0 of channel CHO is made to stop recording. Once removed, the address advance will stop at the position indicated by CHQ in FIG. 5(A).

Then, a command is sent to the waveform read/write control unit 40-1 of channel CHI via the pass line CBUS to start recording. And in this case, the third
Record fN starts from address ■ in the figure. Then, the process proceeds to step S@, where it is judged whether or not the address specification of the waveform read/write control unit 40-1 has been made up to the position shown in FIG. When the address is reached, a determination of Y6s is made and the process proceeds to the next step s1.

That is, in this step St, the fifth IgJ(B)
As shown in FIG. 3, data in the delay trigger area is transferred to a predetermined area of the work memory 390.

In this case, since the data in area F in the same figure was recorded before the data in areas A to C,
First, data D, -, and F are transferred first, and then data A to C are transferred to change the arrangement order. Then, in the state shown in FIG. 5(C), flk IJ of the recording memory 41 is transferred.
As a result, in this recording memory 41, external sound signals are digitally recorded in areas ■ to ■. To cut unnecessary parts about %LE, operate cut switch 11.
This is done by operating the fine switch 15 or course volume 16 while the DII-1 is lit.The tone map LED 14 also displays the memory position and length of the sound, and the display status changes each time the cutting operation is performed. , the storage area will be displayed.

The above was a case in which a single tone signal was manually input into the recording memory 41, but by changing the tone number using the tone set switch 121, different tones can be continuously input.

That is, at that time, the CPU 38 controls the waveform read/write control N.
A recording start address and a recording end address are appropriately specified for the section 40-0.40-1 and recorded. FIG. 6 shows a state in which the waveform information of tones 1 to 5 is stored in this manner. Each time the tone set switch 12 is operated, the tone number changes and is numerically displayed on the tone LHD 13, and the tone map LED 14 displays the storage area of the tone.

Then, if you operate the clear switch 9, the tone LED
The waveform information of the number displayed in I3 and the numbers after it are deleted. Therefore, for example, tone LED1
When "3" is displayed in "3", if you operate this clear switch 9, tones 3 to 5 will be transferred to the recording memory 4.
1, and a new external f signal can be recorded.

The signal input in this way is then read from the CPO 38 by operating the check switch 36.
The write control unit 40-0 is instructed to sequentially access the data, read out, converted into an analog signal via the D/person converter 43, and amplified appropriately by the VCA 45-0, and then outputted. The signal is output from the output terminal 37, and the sound is generated. Therefore, the recording status can be checked.

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

The WIT diagram 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.

Each data is recorded in order of sokuchi and tone number,
For example, in the tone 1 area, the following data is CP
It is stored in the work memory 39 under the control of U38.

First of all, Star Dobu Stomach Number (8T A l(, TB
LOCK #) specifies the first block in which the tone 10 waveform is stored, and the end block number iN
D BLOCK #) specifies the last block in which the tone 10 waveform is stored. The tone map LED 14 displays the information based on these two pieces of information.

The next data, that is, the general start block number 1f-7 (GIN 5TART BLOCK #) specifies the block address at which actual sound generation starts, and the next general start address (GIN 8T
(ADRS) specifies the lower address in the program. This value is set using the general start switch 200s, the fine switch +15.15, and the coarse volume 16. Figure 8 shows such a state, and the general start device can be taken from anywhere in the storage area of tone N. Also, the next general end block number (GEN
END BLOCK #) and general end address (GIN END ADR8) are set by fine switch 15 after operating general end switch 21.
．． 15 and course volume 16. FIG. 8 further shows that the position of the general end input in this way can be freely taken.

In addition, the repeat star block number (REP 5TART BLOCK) stored in the next area
@), Repeat start address (REP 8T
ART AD) is a repeat start switch 2
After the operation in step 2, the fine switch 15° 15 and the coarse volume 16 are used to set the starting position for repeat access to a specific area of stored waveform information. Similarly, the repeat end block number (REP END BLOCK
#), repeat end address (REP EN
DADR8) is set using the fine switch 15.15 (!: course volume 16) after operating the repeat end switch 23, and is used to designate the end position of a specific area of waveform information.

This state is as shown in Fig. 9, and during actual performance, the general star) (GE N 8
The waveform read/write control section 40-0~
40-3 accesses the waveform information, and then repeatedly accesses the waveform information a predetermined number of times from the repeat start position to the repeat end position, and then accesses the waveform information 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 (TONHPITCH) stored in the work memory 39 in Figure 8g7 is set by the tone pitch switch 19.
After the operation, the settings are made by operating the fine switch 15° 15 and the course volume 16, and by reflecting this setting information and the setting information by operating the master tune switch 18, the pitch (PITCH) C-C in FIG. Frequency information of a 12-tone scale of a specific octave is determined.

Work memory 39 keyboard center (KEY B
After operating the keyboard center switch 31, press the fine switch 15.
15. This is set by operating the course volume 16, and determines which scale the recorded external sound signal is associated with. The correspondence relationship is displayed numerically on the value LED 17. According to this keyboard center setting, the information on pitches 01 to C changes, providing a transposition function.

That is, for example, the frequency of the external sound signal is f! Then, the scale specified by the keyboard center will have the frequency [1, and it is possible to variably set which scale has the frequency f1 by changing the keyboard center.

Then, according to this keyboard center setting,
The frequency of each scale is set by incrementing the contents of pitch C-C in the figure by 4# or by changing the correspondence with the scale when this information is actually read.

NextKEYBOARDWIDT
HL) and Keyboard with High (KEYBOARD
WIDTHH) Ei, -t--J - This is set using the operation of the width switch 32, the fine switch 15.15, and the 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 keys on a keyboard connected to MIDI>'f74 and 35 and 5.

Next key touch low (KE Y T OU CHL
)h+-pff high (KEY TOUCHH) is set using the fine switch 15.15 and coarse volume 16 after operating the key touch switch 33, and the use range of the sound is set by key touch (speed ). At this time, values indicating the upper and lower limits are displayed on the value LED 17.

Also, envelope attack, day Kay, sustain,
After operating each of the release switches 27 to 30, use the fine switch 15.15 and course volume 16 to set the envelope attack (ATT) of the work memory 39.
, decoupling (DEC), sustain (8U8), 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 operation when detecting the above-mentioned general start address, end address, repeat start address, or end address will be described 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 the 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 the general start address, end address, repeat start address, or end address.

FIG. 11 shows the processing, in which the CPU 38
The waveform information is read out from the sound memory 41 according to the operation of the fine switch 15 or the coarse volume 16, and the zero cross point is detected. This figure 11 shows 70- when the address moves to the increasing side. ,
The polarity flag is turned off in step Tl, and then step T
2, the pointer in the CPU 38 (this is the recording memory 4
1 address, and the waveform read/write control unit 40
-00 Changes in synchronization with the address counter. ) is incremented.

Then, in step T3, if it is determined whether the data at the address indicated by the pointer is a negative value or not, 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, and turns off when it takes a positive value.

Following step T4, the process proceeds to step Tt and the same operation is repeated. If the data specified by the pointer is positive, the determination in step T3 is No, and the process proceeds to step Ts, where it is determined whether the polarity flag is on.

Then, when the polarity flag is off, that is, when positive amplitude values are being read out continuously, the determination at step Ts is No.
Then, the process moves to step T. and the polarity flag is turned off.

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

In that case, the process of step T1 is executed following step Ts. In step Ty, 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. 1O, a Yes judgment is made in step T6 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 Δ, a clicking sound will be produced. , and the zero-crossing point detection process becomes meaningless. Therefore, if a NO judgment is made in step Ty, steps T1 to T
Repeat step 6. If Yes is determined in step Ty, the series of processing is completed and the value of the pointer at that time is changed to the general start address,
end address or start address,
As the end address, the CPU 38 uses the work memory 39.
write to.

Figure 11 shows the CP when the address changes in the positive direction.
Although the process of U38 is shown, conversely, when the address changes in the negative direction, step T corresponding to step TI
At step s', the polarity flag is turned on, and at step T3' corresponding to step T3, it is judged whether the data of the pointer is positive or not. At step Ta' corresponding to step T4, the polarity flag is turned off, and at step Tll
In step Ts' corresponding to step Ts', the polarity flag is turned off, and in step T' corresponding to step T, the polarity flag is turned on, and the other steps T and Tr are processed in the same way.

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 the recording memory 41 records different waveform information for tones 1 to 4, for example, and the work memory 39
Keyboard Center, Keyboard With Low, High,
It is assumed that information as shown in FIG. 12 is input as each key touch low and high data.

That is, this FIG. 12 schematically shows the data of each of Tone 1 to Tone 4, where the keyboard center of Tone 1 is On (the subscript indicates the octave number, the same applies hereinafter), and the keyboard width is C3. ~B3, the key touch is 0 to 127O Similarly, the keyboard center of tone 2 is C4, the keyboard width is 03 to C6, the key touch is 20 to 80, and the keyboard center of tone 3 is All. , the keyboard width is Cs-,=Bs, the key touch is 81-127, the keyboard center of tone 4 is A4, the keyboard width is F4-B4
And the key touch is θ~120.

Then, in step U1 of FIG. 13, the CPU 38
``1'' is input to the flag register (hereinafter referred to as tone number register) that specifies the tone number (TONE #), and the process then proceeds to step U2, where the tone number is input via the midi-in terminal 35. sound i
(NOTE) Judge whether the code is within the range specified by width 4- and width high of the tone 1 area of the work memory 39. If Yes is determined in step U2 of @ Soshite, Ko, step Proceed to U3. In step U3, an input key touch (KE) input via the midi-in terminal 35 is performed.
Y TOUCH) information is tone 1 of work memory 39
Judge whether it is within the range of key touch low and key touch high in the area.

If Yes is determined in step U3, the process proceeds to step U4, where the tone specified by the tone number register (tone 1 in the case of fHJ) starts to be produced in accordance with the scale code and key touch information.

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-θ to 40-3. or to the controller of an unused channel. Also, the pitch information corresponding to the scale code is read from the work memory 39, converted as appropriate according to the octave information, and the waveform read/write control unit 4 of the designated channel
Give to 0-O to 40-3.

As a result, the waveform read/write control units 40-1 to 40-
3 reads the waveform ma 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.

The analog waveform signal output from the D/A converter 43 is applied to sample and hold circuits 44-O to 44-3, and then to the corresponding WVCAs 45-0 to 45-3. These VCAs 45-0 to 45-3 contain four pieces of digital information that the CPU 38 sequentially changes according to the envelope attack, decay, sustain, and release data that are successively stored in the work memory 39 and the input key touch information. It is provided after being converted into an analog voltage signal by one of the D/A converters 47. Therefore, C no VC
A45-0 to 45-3 c, a predetermined envelope is applied, and the volume is also controlled in accordance with the key touch.

Then, this output signal is mixed by the mixing circuit 46 and outputted to the outside via the output terminal 37.

Now, in step U4 of FIG. 13, the channel to generate sound, the scale, and the key touch are specified in this manner, and the process proceeds to step Us.

Note that the process also proceeds to step Us when it is determined No in the above steps Us and [Js.

Step Us is for incrementing the contents of the tone number register, and after this processing, the process proceeds to step U6 to check whether the processing of steps Us to Us has been completed for all tones, in this case, tones 1 to 4. A judgment is made, and if a negative judgment is made, the process proceeds to step Us. Moreover, if a Yes determination is made in this step U6, the processing for the information input from the day-in terminal 35 is completed. Therefore, when multiple keys are operated on the keyboard at the same time, each time 70- shown in the tg13 diagram is
The PU 38 executes the process and allocates and generates output musical tones to the waveform read/write control units 40-0 to 40-3 of different channels CHO to CH3.

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, if the information input from the midi-in terminal 35 is Cs and a key touch of 40, then the musical tone of tone 1 will be produced at a key touch level of 400. 0 Similarly, if the information input from the midi-in terminal 35 is As and the key touch is 40, the two tones Tone 1 and Tone 2 are the same as the key touch 4.
Pronounced at level 0.

In addition, m N input from Midei Inn Kyukiko 35 is CI
If the key touch is 100, tone 3 is fl'
If J is the same and the key touch is 60, tone 2 will be sounded.

In this way, in this embodiment, it is possible to selectively use a plurality of waveform signals recorded in advance according to the range of the keyboard and the range of key touch, 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.

[Effects of the Invention] According to the present invention, it is possible to store a plurality of digital signals of external sounds in one memory, each having a variable length.
In addition to being able to use memory efficiently, the number of memories required per external f is also drastically reduced, which is advantageous in terms of implementation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a circuit diagram thereof, and FIG. 2 is a diagram showing the operation switch panel of FIG. 1.
Fig. 3 is a diagram showing the contents and addresses of the performance memory, Fig. 4 is a diagram showing a 74-chart explaining the operation of record mode, and Fig. 5 is an arrangement state of data recorded in the delay trigger area. Figure 6 is a state diagram when changing the tone, Figure 6 is a state diagram when multiple tones are recorded in the performance memory, and Figure 7 is a state diagram when changing the
The figure shows the main part of the contents of the work memory in Figure 1, and Figure 8.
The figure is a diagram to explain general start and end position changes, W, Figure 9 is a diagram to explain repeat start, end change, and order of addressing during play, and Figure 10 is a waveform zero cross. FIG. 11 is a diagram showing a 70-chart when detecting a zero cross point, FIG. 12 is a diagram for explaining a keyboard with multiple tones and a key touch range, 1st
FIG. 3 is a diagram showing a 70-chart for explaining the operation in the play mode. 1... Operation switch panel section, 3... Microphone in terminal, 4... Trigger in terminal, 8... Record switch, 9... Clear switch, 10... Trigger switch, 11... Cut Switch, 12...Tone set switch, 13...Tone LEDS 14...
・Tone map LED, 15.15...Fine switch, 16...Coarse volume, 17...Value LED.

Claims (1)

[Claims] The external sound storage means includes external sound storage means for sampling a plurality of external sounds and storing them as variable-length digital signals, and reading means for reading out digital signals representing each of the external sounds stored in the external sound storage means. Characteristic sampling device.