JPH02160295A - Sampling unit - Google Patents

Abstract

PURPOSE:To check an external sound only without connecting a pitch specifying means by connecting a sound system by providing an indicating means which indicates a read of a digital signal regarding the external sound and a control means which performs control so that the digital signal regarding the external sound is read out and supplied to the sound system. CONSTITUTION:The indicating means 36 makes an indication so as to read the digital signal regarding the external sound out of an external sound storage means 41. Then when there is the indication from the indicating means, the control means 38 performs the control so as to read the digital signal regarding the external sound out of the external sound storage means 41 unless there is an indication from the pitch specifying means and supply it to the sound system. Consequently, the external sound can be checked without connecting the pitch specifying means only by connecting the sound system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sampling unit that samples input external sound and stores it as a digital signal.

[Prior art]

2. Description of the Related Art Sampling units that sample input external sound and store it as a digital signal are conventionally known. And for such a sampling unit,
For example, a keyboard and a sound system (consisting of an amplifier, speakers, etc.) are connected to the keyboard, and the external sound stored above is used to produce sound at a pitch specified by the keyboard.

[Disadvantages of conventional technology]

However, the above sampling unit has the following drawbacks.

・If the keyboard (pitch specification means) and sound system are not connected, the memorized external sound cannot be produced.

[Object and main points of the invention]

The present invention aims to eliminate the above-mentioned drawbacks, and includes an instruction means for instructing the sampling unit itself to read out a digital signal related to an external sound, and when an instruction from this instruction means is received, a The main point is that a control means is provided for reading out a digital signal related to an external sound and controlling the digital signal to be supplied to the sound system even when there is no instruction from the pitch specifying means. Therefore, in the sampling unit according to the present invention, external sounds sampled and stored can be checked simply by connecting a sound system without connecting a keyboard or the like (pitch specifying means).

〔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 input terminals and a display H position in addition to various switches. Then, from the outside, the external sound is converted into a voltage signal by a microphone, etc., and inputted to the microphone in (MICI N) terminal.Conversely, this embodiment device outputs a scale tone signal (acoustic signal) to the outside. ) is output via the (OUT PUT) terminal.

In addition, as described later, a command signal (trigger signal) that instructs an external command to start recording a signal input via the microphone in terminal is triggered in (TRIG I
N) Input via the terminal. Furthermore, midi (MIDI)
Keyboard signals or control signals and data from a personal computer or the like are supplied through the IN terminal.

Note that MIDI is a unified standard for interfaces for connecting electronic musical instruments or personal computers and electronic musical instruments.
Intrua+ent 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.

In addition to the above-mentioned microphone in terminal 3 and trigger in terminal 4, a signal level volume 4 for adjusting the level of the signal input from the microphone in terminal 3 is supplied from the microphone in terminal 3. It has a trigger level volume 6 that determines the level (trigger level) at which to automatically start recording an external sound signal, and a level meter 7 that measures the signal level.
will be displayed at This level meter 7 displays the signal level by displaying a bar graph using an LED, for example.

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

The CONSOLE section of the operation switch panel il has 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 the tone LED 13 having a mouth-shaped segment, and the position and length of the area is displayed as a bar graph on the tone map LED 14. 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 the tone set switch 12 is operated.

This console section also has a fine (FINE) switch 15, 15 and a coarse (COAR8E) volume 16, which are used for inputting various parameters. The display state of the VALUE LED 17 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 increases (n) and a switch (<) that indicates the direction in which the parameter decreases. 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
The WAVE section mainly has a plurality of switches for inputting signals specifying how to use or modify input and stored waveform signals, and a master chain (MASTERTUNE) switch 18.
changes the pitch (frequency) of the entire sound, and by operating this switch 18, the internally installed LED 18-1
After the is lit, the actual frequency is determined using the fine switch 15, 15 and the coarse volume 16. At that time, the value LED 17 displays the value corresponding to the frequency. Digitally display and tune.

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. The operation method is the same as that of the master tune switch 18, and is performed by using the fine switch 15, 15, and coarse volume 16 when the LED 19-1 is turned on.

The general (GEN) start switch 201 and end switch 21 of the NIBIT wave section are used to specify the start address and end address of the waveform generated as a musical tone. This is performed using a switch 15.15 and a course volume 16, and the display is performed using a tone map LED 14 and a value LED 17.

In addition, the (REP) start switch 22 and end switch 23 are used to determine the start address and end address of a repeated portion for repeatedly reading out a portion of the stored waveform.
1 are in the lit state, fine switches 15.
15, the course volume 16 is used, and the display is performed using the tone map LED 14 and the value LED 17.

Nibite wave section vibrato speed, depth (DEPTH), and delay switches 24.2
5.26 determines the vibrato speed, depth, delay time or presence/absence, and when each switch is operated, LED 24-1.25-1.2B-1 lights up.
In this state, operate the fine switch 15, 15 and coarse volume 16 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, When each switch 27, 28, 29, 30 is operated to set the release (R) time input mode,
Built-in 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 manually set 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 switch 31 corresponds to which position (scale) on the keyboard the recorded external sound is placed. The WIDTH switch 32 determines the area on the keyboard where the sound is to be played, and the touch (TOU)
CH) switch 33 determines the sound production range of the sound according to the key touch (speed).
When 1132.33 is operated, LED31-1.32
-1.33-1 is lit, and in this lighting state, fine switch 15.15 and coarse volume 16 are used.

That is, when operating the center switch 31, the fine switch 15.15 and coarse volume 16 are operated to display the associated scale name numerically on the value LED 17, and when the width switch 32 is operated, the upper and lower limits of the scale to which the note is assigned are displayed. For example, the value LED 17 displays 4 digits such as H**tree or L****. Note that input switching between the upper limit and the lower limit is performed by continuous operation of the width switch 32.

Also, when operating the touch switch 33, by operating the fine switch 15.15 and course volume 16,
The upper and lower limits of key touches to which the sound is assigned are determined,
H*** or L Kimoto* and the above value LED1
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 sex of the operation switch panel section 1, and when this operation is performed, the internal LED
34-1 lights up, and a performance is performed according to keyboard signals, touch data, etc. input from the outside via the above-mentioned midi-in terminal 35.

Also, the check switch 3B automatically produces the sound displayed on the tone LED 13, allowing you to hear how it was input and stored, and its status is indicated by the LED 38-1! will be displayed.

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 CPU 38 via a pass line ABUS, as shown in FIG. This CPU 38 is composed of a microprocessor and executes various processing controls to be described later.

This CPU 38 includes a work memory 39 having a memory area used for controlling various processes, and a pass line BB.
Connected via US. Further, the CPU 38 is connected to waveform read/write control units 40-0 to 40-3 of four channels (CHO-CH3) via a pass line CBUS. This 4-channel waveform read/write control section 4
0-0 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 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 EBUS. It also outputs a time-division read/write signal (R/W) to the recording memory 41.

Therefore, the waveform read/write control units 40-0 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 .

The recording memory 41 has, for example, a 1.5 mega (M) bit memory, and can be used by being divided into 32 blocks, and can digitally store waveform signals, for example, perform PCM recording. It is something that can be done.

Then, the external sound signal inputted 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 converts it into the above-mentioned waveform. Read/write control unit 40-O
~40-3 (Actually, as described later, channel CH
Waveform read/write control unit 40- corresponding to O, CHI
0.4O-1) and recorded in an appropriate address area of the recording memory 41.

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

The outputs of the sample and hold circuits 44-0 to 44-3 are subjected to amplitude envelope control by VCAs 45-0 to 45-3, and then sent to a mixing circuit 46. That is, VCA45-0 to 45-3
An envelope control signal given from it'CPU 3B is converted into a voltage signal by the D/A converter 47 and supplied, thereby performing envelope control. Furthermore, this D
There are four /A converters 47, and each VCA 45-0 to 4
It is arranged correspondingly to 5-3.

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 FIG. 3, an external sound signal is repeatedly input and recorded in the last block of the recording memory 41 (area from ■ to ■ in the drawing) until a trigger signal is actually applied. Record the external sound signal between. The area from ■ to ■ will be referred to as a delay trigger area. When the record mode is entered, the LED 8-1 lights up.

In this state, recording actually starts when the trigger is pressed. There are three ways to apply this trigger, one is called auto trigger (Auto Trlgge, r), and when the external sound signal exceeds the reference level set with trigger level volume 6, the trigger signal is activated. Occur. 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. The above second method is an external trigger (External trigger).
alTrlgg-5r), and the third method is called manual trigger. Note that the first trigger type and the other trigger type are, for example, if the 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. , only one of the second and third trigger types is adopted.

When a trigger signal is generated by any of the three one-way trigger methods 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 the record switch 8 is operated, step S
Proceeding to I, the CPU 38 sets the address (■) shown in FIG. 3 as the recording start address for the waveform read/write control unit 44-0 of channel CHO, sets the address (■) as the loop start address, Set the address (■) to the loop end address, and then set the loop on state. That is, the waveform read/write control section 44-0 (the same applies to the waveform read/write control sections 44-1 to 44-3 of other channels) can repeatedly read/write a specific address area of the recording memory 41. , in the loop-on state, addresses are specified repeatedly from the loop start address to the loop end address.

After that, the process proceeds to step S2, and the 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 in terminal 3 is sampled, converted into a digital signal by the A/D converter 42, and sequentially written into the upper recording and sound memory 41. Figure 5 (A) shows this state, and shows the delay trigger area (from addresses ■ to ■).
The external sound signal is repeatedly recorded in the area). Note that when recording is repeated to the same MIRAI, the previously stored signals are erased and only the latest input signal is recorded.

For example, this delay trigger area has 100 m5e
The external sound signal of c is now stored. By storing an external sound signal in advance in this delay trigger area, the start of the subsequent actual recording becomes natural.

Next, the process proceeds to step S3, in which the address ■ shown in FIG. 3 is set as the recording start address and the address ■ shown in FIG. 3 is set as the recording end address in the waveform read/write control section 40-1 of channel CHI. 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 above-mentioned auto trigger, external trigger, or manual trigger methods, and when a %NO judgment is made, this step S4
Repeat step 4, and if one signal is input to the bird, Y
After the determination of eS is made, the process proceeds to the next step S5.

In this step S5, the waveform read/write control section 40-0 of channel CHO is made to stop recording. For example, address advancement stops at the position indicated by CHO in FIG. 5(A).

Then, a command to start recording is sent to the waveform read/write control unit 40-1 of channel CH1 via the pass line CBUS. And in this case, the third
Start recording from address ■ in the diagram. And then step S. Then, 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. After making a determination, 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. 5(B). In this case, D-
Since the data in area F was recorded before the data in area A-C, data D-F is transferred first, followed by data A-C, and the arrangement order is changed. is changed, and then recorded in the first block of the recording memory 41, that is, areas ① to ②, in the state shown in FIG. 5 (CC). As a result, this recording memory 41 has an area of
This means that the external sound signal was digitally recorded in ~■.

To cut unnecessary parts of the data recorded in this way, operate the cut switch 11 and press the LE button.
This is done by operating the fine switch 15 or coarse volume 16 while DII-1 is lit. Note that the tone map LED 14 displays the memory position and length of the sound, and the display state changes each time a cutting operation is performed to display the storage area.

The above is a case in which a single tone signal is input to the recording memory 41, but by changing the tone number using the tone set switch 12, different tones can be continuously input.

That is, at that time, the CPU 38 specifies the recording start address and the recording end address as appropriate to the waveform read/write control unit 40-0.40-1, and causes the waveform read/write control unit 40-0.40-1 to record the data. 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 LED 13, and the tone mapped ED 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 at 13 and the numbers after it are deleted. Thus, for example, tone LED 1
If you operate this clear switch 9 when "3" is displayed in 3, tones 3 to 75 will be transferred to the recording memory 4.
1, and a new external sound signal can be recorded.

Then, the signal input in this way is read as a waveform from the CPU 3B by operating the check switch 36.
The write control unit 40-0 is instructed to sequentially access the data, and the signal is read out, converted to an analog signal via the D/A converter 43, and amplified appropriately by the VCA 45-0, and then output to the output terminal. 37, and the sound is generated.

Therefore, the recording status can be checked.

Unique Wave Mode> Next, an explanation 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 that in a specific address area of the work memory 39,
This shows a state in which data related to the external sound signal recorded in the recording memory 41 is stored.

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 CPU.
The data is stored in a work memory 39 under the control of 38.

First, start block number (START BLOC)
K #) specifies the first block in which the waveform of tone 1 is stored, and the end block number (END
BLOCK #) specifies the last block in which the tone 1 waveform is stored.

The tone map LED 14 displays the information based on these two pieces of information.

The following data, namely the general start block number (
GEN 5TART BLOCK #) specifies the block address when starting the actual sound,
Next general start address (GEN 5TAR)
T ADR8) specifies the lower address within the block. This value is set using the fine switch 15.15 and the coarse volume 16 after operating the general start switch 20. FIG. 8 shows such a situation, where the general start position can be taken anywhere in the storage area of tone N.

In addition, the following general end block number (GEN
END BLOCK #) and general end address (GEN END ADR8) are set by fine switch i5. after operating general end switch 21.
15 and course volume 16. 8th
The figure further shows that the position of the general end input in this way can be taken freely.

Also, the repeat start plotter number (REP 5TARTBLOCK #) stored in the next area
, Repeat start address (REP 5TART
ADR8) is set using the fine switch/chi 15.15 and coarse volume 16 after operating the repeat start switch 22, and is used to start when repeating a specific area of stored waveform information repeatedly. Specify the location. Similarly, the repeat end block number (REP END BLOCK#),
Repeat end address (REP ENDADR3)
is set using the fine switch 15.15 and the coarse 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 start (GEN 5TA)
The waveform read/write control units 40-0 to 40-3 access the waveform information from the repeat start position to the repeat start position, and then repeatedly access the waveform information a predetermined number of times from the repeat start position to the repeat end position, After that, 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.

Tone pitch (
TONE PITCH) is tone pitch switch 1
After the operation of 9, the settings are made by operating the fine switch 15, 15 and the course volume 16, and this setting information and
Reflecting the setting information obtained by operating the master tune switch 18, the frequency information of the 12-tone scale of the specific octave of pitches (PITCH) C' to C in FIG. 7 is determined.

Work memory 39 keyboard center (KEY B
OARD 6 ENTER) is set by operating the fine switch 15, 15, and coarse volume 16 after operating the keyboard center switch 31, 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 C'' to C can change and have the function of transposition.

That is, for example, if the frequency of the external sound signal is f, the scale specified by the keyboard center will have the frequency ft, and by changing the keyboard center, it is possible to variably set which scale has the frequency f. can.

Then, by rewriting the contents of pitches 01 to C in Fig. 7 according to this keyboard center setting number, or by changing the correspondence with the scale when this information is actually read out, the frequency of each scale can be changed. is set.

NextKEYBOARDWIDT
HL) and Keyboard with Lowy (KEYBOARD
WIDTHH) is set by operating the keyboard width switch 32, fine switch 15, 15, and coarse volume 16, and sets the usable range of the note in correspondence with the scale note. Note that the keyboard center and keyboard with row 14 may be operated by operating keys of a keyboard connected via the midi-in terminal 35.

Next key touch low (KE Y T OU CHL
) and KEY TOUCHH.
After operating the key touch switch 33, fine switch 1
5.15 and course volume 16, and the usage range of the sound is set in accordance with the 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.
, DEC Stain (SUS)
, release (REL) information is 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 crease 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 reads waveform information from the recording memory 41 according to the operation of the fine switch 15, 15 or the coarse volume 16, and detects the zero cross point.

FIG. 11 shows the flow when the address moves to the increasing side. In step T1, the polarity flag is turned off, and in step T2, the pointer in the CPU 38 (this is the address of the recording memory 41) is turned off. (changes in synchronization with the address counter of the waveform read/write control unit 40-O) is incremented.

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

Following step T4, the process proceeds to step T2 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 T+s, where it is determined whether the polarity flag is on.

When the polarity flag is off, that is, when positive amplitude values are being read out continuously, the determination in step T5 becomes No, and the process moves to step T6, where the polarity flag is turned off.

Further, step TI5 makes a Yes determination 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 cross base.

In that case, the process of step T7 is executed following step T5. 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, in the vicinity of the zero-crossing point of the waveform, Yes is determined in step T5, 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. , and the zero-crossing point detection process becomes meaningless. Therefore, if a No determination is made in step T7, step T I=
The process of T o is executed repeatedly.

If Yes is determined in step T7, the series of processing is completed, and the value of the pointer at that time is set as the general start address, end address, repeat start address, or end address, and the CPU 3
8 is written into the work memory 39.

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
1', the polarity flag is turned on, step T a' corresponding to step T3 judges whether the data of the pointer is positive or not, step T4' corresponding to step T4 turns off the polarity flag, and step TIS
The polarity flag is turned off in step Ta' corresponding to step T. The polarity flag may be turned on in step T8' corresponding to , and the other steps TQ and T7 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 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. The keyboard center of Tone 1 is C3 (the subscript indicates the octave number, the same applies hereinafter), and the keyboard width is 03. ~B3, the key touch is O~127.

Similarly, the keyboard center of Tone 2 is C4, the keyboard width is G, 5-CB, and the key touch is 20-8.
0, tone 3 keyboard center is A6, keyboard quiz is 06-B5, key touch is 81-1
27, the keyboard center of tone 4 is A4,
The keyboard width is F a'=84, and the key touch is 0-120.

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. Musical scale (N
OTE) It is judged whether the code 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 U3, an input key touch (KE) input via the midi-in terminal 35 is performed.
It is judged whether the Y TOUCH) information falls within the range of key touch low and key touch high in the tone 1 area of the work memory 39.

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

That is, the CPU 38 transfers the information specifying the general start position, the end position, the repeat start position, and the end position from the corresponding area of the work memory 39 to any one of the waveform read/write controls 40-0 to 40-3 that is not yet executed. Give to the control unit of the channel in use. Also,
The pitch information corresponding to the scale code is stored in the work memory 3.
9, converts it appropriately according to the octave information, and outputs it to the waveform read/write controller 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 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 processed by sample and hold circuits 44-0 to 44-34m.
It is given to VCA45-0 to 45-3 after giving error and sical. These VCA45-0 to 45-3 include CPU38
However, the digital information that changes sequentially according to the envelope attack, decay, sustain, and release data read out from the work memory 39 and the input key touch information is converted into an analog voltage signal by one of the four D/A converters 47. Given after conversion. Therefore, t:
The VcAs 45-0 to 45-3 apply a preset envelope and also perform volume control in response to key touches.

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 produce sound, the musical scale, and the key touch are specified in this way, and the process proceeds to step U5.

It should be noted that the process also proceeds to step U6 when it is determined No in steps U2 and U3.

Step U6 is to increment the contents of the tone number register, and after this processing, the process proceeds to step 0 and checks whether the processing of steps U2 to U6 has been completed for all tones, in this case, tones 1 to 4. If the judgment is NO, the process proceeds to step U2. Moreover, if a Yes determination is made in this step U8, the processing for the information input from the midi-in terminal 35 is completed. Therefore, when multiple keys are operated on the keyboard at the same time, the flow shown in FIG.
U38 is executed to allocate and generate output musical tones to the waveform read/write controllers 40-0 to 40-3 of different channels CHO-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 U3 with a key touch of 40, the musical tone of tone 1 will be sounded at the level of the key touch of 40. .

Similarly, the information input from the midi-in terminal 35 is
If the key touch is 40 in G, two tones, tone 1 and tone 2, are produced at the level of the key touch 40.

Further, if the information input from the midi-in terminal 35 is 06 and the key touch is 100, toe 73 will be sounded, and if the scale 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 sprint. It is also possible to easily change the tone color by touching a key.

〔Effect of the invention〕

According to the present invention, external sounds can be checked simply by connecting a sound system without connecting a keyboard or the like (pitch specifying means) to the sampling unit.

[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 shows the contents and addresses of the performance memory, Fig. 4 shows a flowchart explaining the operation of record mode, and Fig. 5 shows how to change the arrangement of data recorded in the delay trigger area. Figure 6 is a state diagram when multiple tones are recorded in the performance memory, Figure 7 is a diagram showing the main contents of the work memory in Figure 1, and Figure 8 is a general start diagram. , a diagram to explain changing the end position, Figure 9 is a diagram to explain repeat start, changing the end, and the order of addressing during play, and Figure 10 is a diagram to explain the zero-crossing point of the waveform. , FIG. 11 is a diagram showing a flowchart when detecting a zero-crossing point, FIG.
FIG. 3 is a flowchart for explaining operations in 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 LED, 14...Tone map L
E D115.15...Fine switch, 16...Coarse volume, 17...Value L
ED. 20... General start switch, 21... General end switch 6.22... 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...CPU139
...Work memory, 40-0 to 40-3...Waveform read/write control section,
41... Recording memory, 42... A/D converter, 4
3...D/A converter, 45-0 to 45-3...VCA. Patent applicant: Casio Computer Co., Ltd. Figure 3 1i4 Figure 5 Figure 11! 6 Figure 7! ! l l! Figure 9 Figure 11 Figure 1 and Figure 73

Claims (1)

[Claims] A pitch specifying means and a sound system are connected from the outside, and based on an instruction from the pitch specifying means, a digital signal related to an external sound sampled and recorded in advance in an external sound storage means is read out. in the sampling unit that produces an external sound by supplying the external sound to the sound system, an instruction means for instructing to read out a digital signal related to the external sound from the external sound storage means, and when an instruction from the instruction means is received; , control means for reading out a digital signal related to an external sound from the external sound storage means and controlling the digital signal to be supplied to the sound system even when there is no instruction from the pitch specifying means; A sampling unit featuring: