JPH0631987B2 - Sampling unit - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sampling unit that samples an input external sound and stores it as a digital signal.

[Prior art]

Conventionally, there is known a sampling unit that samples an external sound that is input and stores the sampled external sound as a digital signal. And in such a sampling unit,
For example, a keyboard and a sound system (comprising an amplifier, a speaker, etc.) are connected and used so that the stored external sound is produced at a pitch specified by the keyboard.

[Disadvantages of conventional technology]

However, the above sampling unit has the following drawbacks.

The stored external sound cannot be sounded unless the keyboard (pitch specifying means) and the sound system are connected.

[Object and main points of the invention]

The present invention has an object of eliminating the above-mentioned drawbacks, and a single switch for instructing the sampling unit itself to read out a digital signal relating to an external sound and, when instructed by the switch, is connected from the outside. Even if there is no instruction from the pitch designating means, the main point is to provide a control means for reading out a digital signal related to the external sound and supplying the digital signal to the sound system.
Therefore, in the sampling unit according to the present invention, the external sound sampled and stored can be checked only by connecting the sound system without connecting a keyboard or the like (pitch specifying means).

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail. FIG. 1 shows the circuit configuration of the present embodiment. In FIG. 1, reference numeral 1 denotes an operation switch panel portion, which is provided with various switches, an input terminal and a display device. Then, from the outside, external sound is converted into a voltage signal by a microphone or the like and input,
It is applied to the MIC IN terminal, and conversely, a scale tone signal (acoustic signal) is output from the apparatus of this embodiment to the outside through the output (OUT PUT) terminal.

Further, as will be described later, a command signal (trigger signal) for externally instructing to start recording a signal input via the microphone in terminal is input via the trigger in (TRIG IN) terminal. Further, a keyboard signal or a control signal or data from a personal computer or the like is supplied via a MIDI IN terminal. In addition,
MIDI is Musical Intrument Digi, which is a unified standard of interfaces for connecting electronic musical instruments or for connecting a personal computer and an electronic musical instrument.
Abbreviation for tal Interface.

Details of the operation switch panel portion 1 of FIG. 1 are shown in FIG. That is, in FIG. 2, reference numeral 2 is a power on / off switch for making the apparatus of this embodiment operable.

The record (RECORD) section is provided with the microphone-in terminal 3 and the trigger-in terminal 4, and is also supplied from the signal-level volume 4 and the microphone-in terminal 3 for adjusting the level of the signal input from the microphone-in terminal 3. It has a trigger level volume 6 for determining the level (trigger level) at which the external sound signal is automatically recorded, and the signal level is a level meter 7
Is displayed at. The level meter 7 displays the signal level by displaying a bar graph with an LED, for example.

Further, in the record section, a record (REC) switch 8 for shifting to a record mode, a clear (CLR) switch 9 for clearing a signal already recorded, and a trigger (T
RIG) switch 10 and a cut (CUT) switch 11 for erasing unnecessary portions of the recorded signal, and these switches 8-11 have LEDs 8-1 to 11-1 for lighting up and displaying their operating states, respectively. Is installed inside.

Console of operation switch panel 1 (CONSOL
The section E) has a tone set switch 12 which is operated to distinguish each of a plurality of sounds recorded in one recording memory, as will be described later, and the tone number thereof has a letter segment. It is displayed on the tone LED 13, and the position and length of the area are displayed on the tone map LED 14 as a bar graph. For example, the tone map LED 14 is divided into a number corresponding to the number of blocks of a recording memory described later. Each time the tone set switch 12 is operated, the tone number is increased, for example.

Further, in this console section, fine (FINE) switches 15 and 15 used for inputting various parameters and a COARSE volume 16 are used.
The display state of the value LED 17 having a four-digit day-shaped segment or the tone map LED 14 described above is changed by the operation.

In addition, the fine switches 15 and 15 change the minute change to 1
It is instructed by a degree operation, and comprises a switch () for instructing the direction in which the parameter increases and a switch () for instructing the direction for decreasing the parameter. Also, these switches 15,
If 15 is continuously pressed, the value continuously changes. The course volume 16 is used when the parameters are changed greatly.

Edit wave on the operation switch panel (EDIT
The WAVE section has a plurality of switches for inputting signals that mainly specify how to use or modify the input and stored waveform signals, and a master tune (MASTER TUNE) switch 18 is provided.
Is for changing the pitch (frequency) of the whole sound, and the LED 18-1 installed internally by the operation of this switch 18
After is turned on, the actual frequency is determined by using the fine switches 15 and 15 and the course volume control 16, and the display at that time is performed by the value LED 17. For example, the value corresponding to the frequency is digitally displayed. Display,
Perform tuning.

The tone pitch (TONE PITCH) switch 19 is effective when a plurality of tones (tones) are recorded, and determines the pitch for each tone. The operation method is the same as that of the master tune switch 18,
When the LED 19-1 is turned on, the fine switch 1
5 and 15 course volume 16 is used.

The general (GEN) start switch 20 and end switch 21 of the edit wave section are for designating the start address and end address of the waveform generated as a musical sound, and when the LEDs 20-1 and 21-1 are in the lit state, respectively. The display is performed using the switches 15 and 15 and the course volume 16 and the display is performed by the tone map LED 14 and the value LED 17.

Further, a repeat (REP) start switch 22 and an end switch 23 are for designating a start address and an end address of a repeated portion for repeatedly reading out a part of the stored waveform, and the LEDs 22-1 and 23-1 are turned on respectively. Fine switch 15, 1 when in the state
5, the course volume 16 is used, and the display is performed by the tone map LED 14 and the value LED 17.

Edit wave section vibrato speed, depth (DEPTH) and delay switches 24, 2
Reference numerals 5 and 26 determine the vibrato speed, depth, delay time, and presence / absence of the delay. When each switch is operated, the LEDs 24-1, 25-1, 26-1 are turned on,
In that state, the fine switches 15 and 15 and the course volume 16 are operated to input each parameter. At this time, the value is numerically displayed by the value LED 17.

Further, in the present embodiment, it is possible to add an envelope different from the envelope it has to the pre-recorded waveform, the attack (A) time of the envelope,
Decay (D) time, Sustain (S) level, release
(R) Each switch to set the mode to input the time 2
When each of 7, 28, 29, 30 is operated, the LEDs 27-1, 28-1, 29-1, 30-1 provided therein are turned on and the fine switches 15, 15 and the course volume 16 are used. This allows each parameter to be digitally input. At that time, the value of each parameter is displayed on the value LED 17.

Further, in this embodiment, the relationship between the keyboard of the connected keyboard musical instrument and the output musical tone can be variably set, and the center (CENTER) switch 31 corresponds the recorded external sound to which position (scale) of the keyboard. Then, the WIDTH switch 32 determines the sounding area of the sound on the keyboard, and the touch (TOUC)
H) switch 33 determines the sounding range of the sound according to the key touch (speed).
When 1, 32, 33 are operated, LEDs 31-1, 32
-1, 33-1 are lit, and in this lit state, the fine switches 15, 15 and the course volume 16 are used.

That is, when the center switch 31 is operated, the corresponding scale names are numerically displayed on the value LED 17 by operating the fine switches 15 and 15 and the course volume 16, and when the with switch 32 is operated, the upper and lower limits of the scale to which the relevant sound is assigned. Is displayed by a 4-digit display such as H *** or L *** on the value LED 17, for example. The input switching between the upper limit and the lower limit is performed by continuously operating the with switch 32.

Further, when the touch switch 33 is operated, the fine switches 15, 15 and the course volume 16 are operated,
The upper and lower limits of the key touch to which the sound is assigned are determined,
Value LED 1 as H *** or L ***
The input level is displayed at 7. The upper limit,
The lower limit input switching is performed by continuous operation of the touch switch 33.

In the midi section of the operation switch panel section 1, there is a play switch 34, which is an LED installed by this operation.
34-1 lights up, and a performance is performed according to a keyboard signal, touch data, etc. input from the outside through the above-mentioned MIDI IN terminal 35.

Further, the check switch 36 can hear how the sound displayed on the tone LED 13 is automatically generated and how it is input and stored, and the state is displayed by the LED 36-1.

From the output terminal 37, the play switch 34
During the operation of or the operation of the check switch 36, the output scale tone signal is sent to the external amplifier and speaker.

The operation switch panel unit 1 is connected to the CPU 38 via the bus line ABUS as shown in FIG. The CPU 38 is composed of a microprocessor and executes various processing controls described later.

The CPU 38 has a work memory 39 having a memory area used for various processing controls and a bus line BB.
Connected via US. Further, the CPU 38 is connected to the waveform read / write control units 40-0 to 40-3 of four channels (CH0 to CH3) via the bus line CBUS. This 4-channel waveform read / write controller 4
0-0 to 40-3 may have separate hardware, or may operate four channels by time division processing.

The 4-channel waveform read / write control units 40-0 to 40-3 transmit the address signal (ADDRESS) to the recording memory 41 in a time division manner on the bus line D.
The recording memory 41 and the data (DA
(TA) is exchanged via the bus line EBUS. It also outputs a time-divisional read / write signal (R / W) to the recording memory 41.

Therefore, the waveform read / write control units 40-0 to 40-3
Can send different address signals to the recording memory 41 to access the waveform information in the same area or different areas. Also, while writing the waveform information in one channel, the waveform information in another channel can be accessed. Can also be read.

The recording memory 41 has a memory of, for example, 1.5 mega (M) bits, and can be divided into 32 blocks for use. Digital recording of waveform signals, for example, PCM recording is possible. It is a thing.

Then, the external sound signal input through the microphone-in terminal 3 of the operation switch panel unit 1 is sampled and given to the A / D converter 42, which converts the digital signal into a digital signal and outputs the above waveform. Read / write control unit 40-0
~ 40-3 (Actually, the channel CH
Waveform read / write control unit 40-corresponding to 0 and CH1
0, 40-1) and recorded in an area of an appropriate address of the recording memory 41.

Further, the digital signal read from the recording memory 41 and output by the waveform read / write control units 40-0 to 40-3 is given to the D / A converter 43 in a time division manner and converted into an analog signal. Sample and hold after conversion (S & H)
It is provided to the 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 40-0 to 40-3 in a time division manner and for each channel.

Then, the outputs of the respective sample hold circuits 44-0 to 44-3 are subjected to amplitude envelope control by the VCAs 45-0 to 45-3 and sent to the mixing (MIXING) circuit 46. That is, VCA 45-0 to 45-3
Indicates that the envelope control signal given from the CPU 38 is D
The / A converter 47 converts the voltage signal and supplies the voltage signal to perform envelope control. This D / A
There are four converters 47 for each VCA 45-0 to 45-.
It is arranged corresponding to 3.

The signal mixed by the mixing circuit 46 is
Output through the output terminal 37 of the operation switch panel section 1.

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

<Record mode> External sound signal can be input from the microphone in terminal 3,
The record switch 8 is operated to enter the record preparation state. That is, in the record preparation state, as shown in FIG. 3, the external sound signal is repeatedly input and recorded in the final block (the area from to in the drawing) of the recording memory 41 until the trigger signal is actually applied. Record the external sound signal of. The area from this point onward will be referred to as the delay trigger area. Then, when this record mode is entered, the LED 8-1 is turned on.

In this state, recording is actually started when a trigger is applied. There are three ways to apply this trigger, one is called Auto Trigger, and a trigger signal is generated when the external sound signal exceeds the reference level set by the trigger level volume 6. The second is operated by an external trigger signal input through the trigger-in terminal 4, and the third is generated by the operator himself operating the trigger switch 10. Therefore, the second method is called an external trigger and the third method is called a manual trigger. The first trigger method and the other trigger methods are, for example, when the trigger level volume 6 is provided with a range where an auto trigger is not added, and the trigger level volume 6 is located at such a position, Only the third and third trigger methods are adopted.

Then, when a trigger signal is generated by any of the three trigger methods described above, the LED 10-1 is turned on.

Now, the operation of the CPU 38 in the record mode will be described with reference to FIG.

First, when the record switch 8 is operated, step S
₁ , the CPU 38 sets the address shown in FIG. 3 as the recording start address to the waveform read / write controller 44-0 of the channel CH0, sets the address to the loop start address, and sets the loop end address. Set the address to, and set the loop-on state. That is, the waveform read / write control unit 4
4-0 (waveform read / write control unit 4 of another channel
4-1 to 44-3 are the same), the specific address area of the recording memory 41 can be repeatedly read / written.
In the loop-on state, the address is specified from the repeat address from the loop start address to the loop end address.

Then, after that, the process proceeds to step S ₂ and the channel CH
A command is given to the waveform read / write controller 44-0 of 0 via the bus line CBUS to start recording. Therefore, after the external sound signal input through the microphone-in terminal 3 is sampled, it is converted into a digital signal by the A / D converter 42 and sequentially written in the recording memory 41. FIG. 5 (A) shows this state, and the external sound signal is repeatedly recorded in the delay trigger area (area from address to). When repeatedly recorded in the same area, the signal previously stored is erased and only the latest input signal is recorded. For example, an external sound signal of 100 msec is stored in this delay trigger area. By storing the external sound signal in advance in this delay trigger area, the actual rising of the subsequent recording becomes natural.

Next, in step S _3, to the waveform read / write control unit 40-1 of the channel CH1, and set the address shown in FIG. 3 as a recording start address, sets the address as a recording end address. Of course, the recording start address and the recording end address can be variably set.

And then proceeds to step S _4, the above-described automatic trigger, ik star null triggered by one of the methods of manual trigger whether to judge the trigger signal is input, the No determination is made, step S
Repeat ₄ and if the trigger signal is input Y
The judgment of es is made and the process proceeds to the next step S ₅ .

In step _{S 5,} relative to the waveform read / write control unit 40-0 of the channel CH0, to stop the recording. For example, address advancement is stopped at the position indicated by CH0 in FIG. 5 (A).

Then, a command to start recording is sent to the waveform read / write control unit 40-1 of the channel CH1 via the bus line CBUS. And in the present case, the third
Start recording from the address shown. Then proceed to the next step S _6, and whether judges addressing waveform read / write control unit 40-1 is made to the position of FIG. 3 in this case, repeating steps S ₆ if No, the final When the address is reached, a Yes determination is made and the operation proceeds to the next Step S ₇ .

That is, in step S _7, as shown in FIG. 5 (B), and transfers the data of the delay trigger area in a predetermined area of the work memory 39. In this case, D to F in FIG.
Since the data in the area A is recorded before the data in the area A to C, the data D to F are transferred first, and then the data A to C are transferred, and the order of arrangement is changed. After the change, the data is recorded in the first block, that is, the area (1) to (4) of the recording memory 41 in the state shown in FIG. As a result, the recording memory 41 has an area ~
The external sound signal is digitally recorded in.

Then, in order to cut unnecessary portions of the data recorded in this way, operate the cut switch 11
This is done by operating the fine switch 15 or the course volume control 16 while D11-1 is on. The tone map LED 14 displays the memory position and length of the sound, the display state changes each time the cutting operation is performed, and the storage area is displayed.

The above is the case of inputting a signal of one sound to the recording memory 41, but the tone number can be switched by the tone set switch 12 to continuously input different sounds.

That is, at this time, the CPU 38 causes the waveform read / write control units 40-0 and 40-1 to record by appropriately designating the recording start address and the recording end address. FIG. 6 shows a state in which the waveform information of tones 1 to 5 is stored in this way. Then, each time the tone set switch 12 is operated, the tone number is changed and displayed numerically on the tone LED 13, and the tone map L is displayed.
The ED 14 displays the storage area of the sound.

Then, if the clear switch 9 is operated, the tone LED
The waveform information of the numbers displayed in 13 and the numbers after that are deleted. Therefore, for example, the tone LED 13
When "3" is displayed on, the clear switch 9
When you operate, tone 3 to tone 5 will be recorded in memory 41
The new external sound signal can be recorded.

Then, the signal input in this way is read from the CPU 38 by the operation of the check switch 36 to read / write the waveform.
The write control unit 40-0 is instructed to sequentially access, read out, converted into an analog signal through the D / A converter 43, and appropriately amplified by the VCA 45-0, and then output terminal. It is output from 37 and is sounded.
Therefore, the recording state can be checked.

<Edit Wave Mode> Next, the operation of changing the input waveform signal in this manner to form a waveform signal for an actual output musical tone signal will be described.

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

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

First, the start block number (START BLOCK
#) Designates the first block in which the waveform of tone 1 is stored, and the end block number (END BLO)
CK #) specifies the final block where the tone 1 waveform is stored. The tone map LED 14 is displayed based on these two pieces of information.

The next data, that is, the general start block number (GEN START BLOCK #), specifies the block address at which the actual sound generation is started, and the next general start address (GEN START ADD
RS) designates a lower address within the block. This value is set using the fine switches 15 and 15 and the course volume control 16 after the operation of the general start switch 20. FIG. 8 shows such a state, and the general start position can be taken from anywhere in the tone N storage area.

In addition, the next general end block number (GEN
The END BLOCK #) and the general end address (GEN END ADRS) are input using the fine switches 15 and 15 and the course volume control 16 after the operation of the general end switch 21. FIG. 8 further shows that the position of the general end input in this way can be freely set.

In addition, the repeat start block number (REP START BLOCK #) stored in the next area,
Repeat start address (REP START AD
RS) is set by using the fine switches 15 and 15 and the course volume 16 after the repeat start switch 22 is operated, and the start position at the time of repeat for repeatedly accessing a specific area of the stored waveform information is set to RS. specify. Similarly, the repeat end block number (REP END BLOCK #) and the repeat end address (REP END ADRS) are stored in the fine switch 15, after the repeat end switch 23 is operated.
It is set using 15 and the course volume 16, and specifies the end position of the specific area of the waveform information.

This state is as shown in FIG. 9, and at the time of actual performance, the general start (GEN STAR
The waveform read / write control units 40-0 to 40-3 access the waveform information from the position (T) to the repeat start position, and thereafter, repeatedly access the waveform information a predetermined number of times from the repeat start position to the repeat end position,
Then, the waveform information is accessed from the repeat end position to the general end position. The passage of the repeat end position may be made, for example, when the performance key of the keyboard is turned off. The operation of setting the general and repeat start addresses and the end address will be described later.

The tone pitch (TONE PITCH) stored in the work memory 39 of FIG.
After the operation of 9, it is set by operating the fine switches 15 and 15 and the course volume 16, and the setting information and
Reflecting the setting information by the operation of the master tune switch 18, the frequency information of 12 scales of the specific octave of the pitch (PITCH) C ^# to C in FIG. 7 is determined.

Keyboard center of work memory 39 (KEY BO
ARD CENTER) is set by operating the fine switches 15 and 15 and the course volume 16 after operating the keyboard center switch 31, and determines to which scale the recorded external sound signal is associated. The correspondence is displayed numerically on the value LED 17. The information on the pitches C ^{# to} C changes according to the setting of the keyboard center, and the function of transposing can be provided.

That is, for example, scales the frequency of the external sound signal is specified by the keyboard center equal to ₁ is made to have a frequency _1, which scale by changing the keyboard center can be variably set or with a frequency _1.

And according to the setting of this keyboard center,
The frequency of each scale is set by rewriting the contents of the pitches C ^{# to} C in the figure or by changing the correspondence with the scale when this information is actually read out.

Next keyboard with low (KEYBOARDWIDT
H L) and keyboard with high (KEYBOARD)
WIDTH H) is set by operating the keyboard with switch 32 and the fine switches 15, 15 and the course volume 16, and sets the use range of the sound corresponding to the scale sound. The keyboard center, the keyboard with low, and the high may be operated by operating the performance keys of the keyboard connected via the MIDI IN terminal 35.

The next key touch low (KEY TOUCH L) and key touch high (KEY TOUCH H) are the fine switches 15 and 15 after the key touch switch 33 is operated.
And the course volume 16 are used, and the use range of the sound is set according to the key touch (speed). At this time, the value indicating the upper limit and the lower limit is displayed on the value LED 17.

Also, envelope attack, decay, sustain,
After operating the release switches 27 to 30, the fine switches 15 and 15 and the course volume 16 are used to operate the envelope attack (AT) of the work memory 39.
T), decay (DEC) sustain (SUS), and release (REL) information are set.

In addition, although the vibrato information and the like are input to the memory area of tone 1, the description thereof will be omitted.

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

FIG. 11 shows the processing, and the CPU 38 reads the waveform information from the recording memory 41 in accordance with the operation of the fine switches 15 and 15 or the course volume 16, and detects the zero cross point.

FIG. 11 shows the flow when the address is moved to the increasing side. At step T _{1, the} polarity flag is turned off, then at step T ₂ , the pointer in the CPU 38 (this is the recording memory 41). Is designated and changes in synchronization with the address counter of the waveform read / write control unit 40-0) is incremented.

Then, then the data at the address indicated by the pointer at step T ₃ is judge whether a negative value, if the Yes determination is made, and proceeds to turn on the polarity flag to step T _4. The polarity flag is turned on when the amplitude value of the waveform takes a negative value, and turned off when it takes a positive value.

Then, following step T ₄ , the process proceeds to step T ₂ , and the same operation is repeated. Then, the data designated by the pointer is positive when the determination in step T ₃ proceeds to No and Step T _5, whether to judge the polarity flag is ON.

Then, when the polarity flag is off, that is the positive judgment of Step T ₅ when the amplitude value is read continuously in N
the operation proceeds to o next step T _6, an off state polarity flag.

Further, the step T ₅ is the determination of Yes is a negative amplitude value of the previous pointer, and if the amplitude value of the current pointer is positive, is when just passed the zero-crossing point.

At that time, it executes the processing of step T ₇ following the step T _5. In step T _7, the amplitude value data of the current pointer is judge whether or not a predetermined value △ below. That is, as shown in FIG. 10, in the zero-crossing point near the waveform, although the steps T ₅ the Yes judgment, actually when the address point is not less, i.e. clicks popping not smaller than a predetermined value △ Therefore, the meaning of the zero-cross point detection processing becomes meaningless. Therefore, when the No judgment is made at step _{T 7,} Step _T 1 through T ₆ until the next zero cross point
The process of is repeatedly executed. Then, in step T ₇ , Y
When the judgment of es is made, the series of processing is ended, and the CPU 38 writes the value of the pointer at that time into the work memory 39 as the general start address, the end address or the repeat start address, the end address.

Figure 11 shows the CP when the address changes in the positive direction.
Although the processing of U38 is shown, on the contrary, when the address changes in the negative direction, the step T corresponding to the step T ₁ is performed.
₁ In _'to select the polarity flag in step T ₃ corresponding to step T _3', step T of the pointer data whether to judge positive, corresponding to step T _4
'In, and turns off the polar flag, Step T ₅ corresponding to step T _{5' 4} turns off the polar flag in other steps T ₂ together to turn on the polarity flag in step T _{6 'corresponding} to step T ₆ , T ₇ may be similarly performed.

<Play Mode> Next, the operation in the play mode in which the play switch 34 is operated to perform a performance in accordance with a signal input from the MIDI IN terminal 35 will be described below.

In the recording memory 41, for example, different waveform information of tones 1 to 4 is recorded, and the work memory 39 is also used.
Keyboard center, keyboard with low, high,
It is assumed that the information as shown in FIG. 12 is input as each data of key touch low and high.

That is, FIG. 12 schematically shows each data of tone 1 to tone 4, the keyboard center of tone 1 is C ₃ (subscript indicates octave number, the same below), keyboard width is. Key touch is 0 to 127 in C _{3 to} B ₃ .

Similarly, the keyboard center of tone 2 is C ₄ , the keyboard width is G ₃ ^{# to} C ₆ , and the key touch is 20 to 8.
0, the keyboard center of tone 3 is A ₅ , the keyboard width is C _{5 to} B ₅ , and the key touch is 81 to 1.
Is 27, keyboard center of tone 4 in the _{A 4,}
Keyboard with F ₄ ^# ~ B ₄ , key touch 0
120.

Then, by step U _{1 in} FIG. 13, the CPU 38
"1" is input to a flag register (hereinafter, this register is referred to as a tone number register) that specifies a tone number (TONE #), and then the process proceeds to step U ₂ and is input through the MIDI IN terminal 35. Scale (NO
TE) code is judged whether it is within the range designated by the with low and with high of the tone 1 area of the work memory 39.

Then, if the determination of Yes is made in this step U ₂ , the process proceeds to step U ₃ . In step U ₃ , the input key touch (KEY) input through the MIDI IN terminal 35 is performed.
It is judged whether or not the TOUCH) information is within the range of the key touch low and the key touch high in the tone 1 area of the work memory 39.

Then, if the determination of Yes is made in this step U ₃ ,
Proceeding to step U ₄ , the tone designated by the tone number register (that is, tone 1 in this case) is started to sound according to the scale code and the key touch information.

That is, the CPU 38 outputs information specifying the general start position and the end position, information specifying the repeat start position and the end position from the area of the work memory 39 to the waveform read / write control 40-0 to 40-3. It is given to the control unit of the channel in use. Also, the pitch information corresponding to the scale code is read from the work memory 39, converted appropriately according to the octave information, and given to the waveform read / write control units 40-0 to 40-3 of the designated channel.

As a result, the waveform read / write control units 40-1 to 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 applied to the sample hold circuits 44-0 to 44-3, and then applied to the VCAs 45-0 to 45-3. The VCA 45-0 to 45-3 has a CPU 38
However, the envelope attack, decay, sustain, and release data read from the work memory 39 and the digital information that sequentially changes according to the input key touch information are converted into analog voltage signals by any of the four D / A converters 47. Given after being converted. Therefore, the VCAs 45-0 to 45-3 add a preset envelope and also control the volume according to the key touch.

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

Now, in step U _{4 of} FIG. 13, the channel to be sounded, the scale and the key touch are designated in this way, and the process proceeds to step U ₅ . It should be noted that, even if it is determined No in the above steps U ₂ and U ₃ , the process proceeds to step U ₅ .

Step U ₅ is to increment the contents of the tone number register, proceeds to step U ₆ After this treatment, all the tones, the tone 1-4 in this case the process of step U ₂ ~U ₅ is terminated It is judged whether or not the judgment is made, and if the judgment is No, the process proceeds to step U ₂ . Further, when the Yes judgment is made in step U _6, the process is completed for the information inputted from the Midiin terminal 35. Therefore, when a plurality of keys are simultaneously operated on the keyboard, the CP shown in FIG.
U38 executes and allocates the output musical tones to the waveform read / write control units 40-0 to 40-3 of different channels CH0 to CH3 and generates them. When a mute command is given from the midi-in terminal 35, the same processing is executed to stop the sound generation.

Now, in the example shown in FIG. 12, assuming that the information input from the MIDI IN terminal 35 is the key touch 40 at C ₃ , the tone 1 tone is produced at the level of the key touch 40. It Similarly, the MIDI IN terminal 3
If the information input from No. 5 is A ₃ and the key touch is 40, two sounds of tone 1 and tone 2 are key touch 40.
Is pronounced at the level of.

Further, if the key touch 100 information C ₅ input from Midiin terminal 35, tone 3, scale is given the same key touch 60, tone 2 is pronounced.

As described above, in this embodiment, a plurality of pre-recorded waveform signals can be selectively used according to the keyboard range and the key touch range, and the conventional keyboard split function can be further enhanced. It is also possible and the tone color can be easily switched by key touch.

〔The invention's effect〕

According to the present invention, it is possible to check an external sound only by connecting a sound system without connecting a keyboard or the like (pitch specifying means) to the sampling unit.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, FIG. 1 is a circuit configuration diagram thereof, FIG. 2 is a diagram showing an operation switch panel of FIG.
FIG. 3 is a diagram showing the contents and addresses of the performance memory, FIG. 4 is a flowchart showing the operation of the record mode, and FIG. 5 is a diagram showing the arrangement state of the data recorded in the delay trigger area. FIG. 6 is a state diagram when recording a plurality of tones in the performance memory, FIG. 7 is a diagram showing a main portion of the contents of the work memory of FIG. 1, and FIG. 8 is a general start. , FIG. 9 is a diagram for explaining the change of the end position, FIG. 9 is a diagram for explaining the order of addressing at the time of repeat start, end change and play, and FIG. 10 is for explaining the zero cross point of the waveform. FIG. 11 is a diagram showing a flowchart for detecting a zero-cross point, and FIG. 12 is a diagram for explaining a keyboard and key touch allocation range of a plurality of tones.
FIG. 3 is a diagram showing a flowchart for explaining the operation in the play mode. 1 ... Operation switch panel part, 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 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 with switch, 33 …… Keyboard touch switch, 34 …… Play switch, 35 …… Midi-in terminal, 36 …… Check Switch, 37 ... Output terminal, 38 ... CPU, 39 ... Work memory, 40-0 to 40-3 ... Waveform read / write control unit, 41 ... Recording memory, 42 ... A / D converter, 43 ... D / A converter, 45-0 to 45-3 ... VCA.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Morokuma 3-2-1 Sakaemachi, Hamura-cho, Nishitama-gun, Tokyo Satoshi Watanabe Examiner, Hamura Technology Center, Casio Computer Co., Ltd.

Claims (1)

[Claims] 1. A tone pitch designating means and a sound system are connected from the outside, and a digital signal relating to an external tone sampled and recorded in an external tone storage means in advance is read out based on an instruction from the tone pitch designating means. In the sampling unit that produces an external sound by supplying it to the sound system, a single switch for instructing to read a digital signal relating to the external sound from the external sound storage means, and when there is an instruction from this switch A control means for reading a digital signal relating to an external sound from the external sound storage means and supplying the digital signal to the sound system even when there is no instruction from the pitch specifying means, Sampling unit characterized by.