JPH02160293A - Sampling device - Google Patents

Abstract

PURPOSE:To utilize a memory efficiently and to remove a noise even if the noise is written in the memory by specifying optionally an unnecessary part of the digital signal of an external sound which is sampled and recorded and cutting the unnecessary part. CONSTITUTION:An external sound storage means 41 samples the input external sound and stores it as the digital signal and a display means 8-1 displays the storage state of the external storage means 41. Then, an indicating means 10 specifies the optional part of the digital signal expressing the external sound stored in the external sound storage means 41 and an erasing means 11 erases the digital signal of the part specified by the specifying means 10 from the external sound storage means 41. Therefore, the unnecessary part of the digital signal of the external digital signal which is sampled and recorded can be specified optionally and cut. Consequently, the memory is utilized efficiently and even if the noise is written in the memory, it can be removed.

Description

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

[Prior art]

2. Description of the Related Art Conventionally, there is a sampling device that specifies a start address and an end address of a memory in advance, and then writes an external sound to be input into a memory area defined by the two addresses.

[Disadvantages of conventional technology]

However, sampling devices of the type that write the external sound after specifying the memory area in which the external sound is to be written in advance, such as the above-mentioned sampling device, have the following two drawbacks.

(2) If the length of the input external sound is shorter than the length of the pre-designated memory area, the no-f portion will be stored in the latter half of the designated memory area, resulting in wasted memory. Further, even when external sound is reproduced, the silent portion is reproduced, which is undesirable.

■If the length of the input external sound is longer than the length of the pre-specified memory area, even though the amplitude value of the external sound has not yet been completely attenuated, the above memory area will end. External sound writing is forcibly terminated. Therefore, when the acquisition of the external sound ends at a point other than the so-called zero-crossing point of the external sound, noise is written at the end of the memory area. Summary] This invention aims to eliminate the above two drawbacks, and aims to solve the above two drawbacks.
The main point is that it is possible to arbitrarily specify and cut the missing qPs.

Embodiment C] This is an operation switch panel section, and in addition to various switches, input terminals and a display device are also provided. Then, from the outside, the external sound is converted into a voltage signal by a microphone, etc., and is inputted to the microphone in (MICIN) terminal.Conversely, this embodiment device outputs a scale tone signal (acoustic signal) to the outside. Output via the OUTPUT terminal.

In addition, as described later, a command signal (trigger signal) that instructs the start of recording the signal input via the microphone in terminal from the outside is triggered in (TRIG IN).
Input via terminal. Furthermore, keyboard signals or control signals and data from a personal computer or the like are supplied via a MIDI in terminal. Note that MIDI is a unified standard for interfaces for connecting electronic musical instruments or personal computers and electronic musical instruments.
Strument Digital Interface
It is an abbreviation of e.

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 mic-in terminal 3 and trigger-in terminal 4, the RECORD seven-channel recorder is equipped with a signal level volume 4 that adjusts the level of the input signal from the mic-in terminal 3, and a signal level volume 4 that is supplied from the mic-in terminal 3. The signal level is displayed on the level meter 7 by adjusting the trigger level volume A6 which determines the level (trigger level) at which the external sound signal to be recorded is automatically started (trigger level). The I/meter 7 displays the signal level by displaying a Keyaki graph using the LED Iζ, for example.

Furthermore, the record switch includes a record (REC) switch 8 for transitioning to record mode, and a clear (CLR) switch 9 for clearing already recorded signals.
, a trigger in which the performer manually inputs a trigger signal (TR
IG) Switch 10゜Equipped with a cut (CUT) switch 11 for erasing unnecessary parts of the recorded signal,
Each of these switches 8 to 11 has an LED 8-1-11-1 provided therein to indicate the operating state thereof.

Console of operation switch panel section 1 (CON8OLE
) As will be described later, the seven tone set switch 12 has a tone set switch 12 that is operated to distinguish between multiple tones when they are recorded in one recording memory, and the tone number is The tone having a segment is displayed on the LBD 13, and the length of the area is displayed as a graph on the tone map LED 141. 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 also has FINE switches 15, 15 and COAR8E volume 16, which are used for inputting various parameters. Value (MA) with a digit segment.

LUE) The display state of the LED t7 or the tone map LED 14 described above changes.

Note that the fine switch 15.15 handles minute changes by 1
The switch consists of a switch (>) that indicates the direction in which the parameter increases and a switch (ri) that indicates the direction that the parameter decreases.
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 the input and stored waveform signals, and the master tune (MASTBRTUNE) switch 18 controls the overall This is a device that changes the pitch (frequency) of the sound, and after the built-in LBDlB-1 is lit by operating this switch 18, the actual frequency is determined using the fine switch 15.15 and coarse volume 16. The display at that time is performed by the value LhiD17, for example, by digitally displaying the value corresponding to the frequency,
Perform tuning.

Further, the tone pitch (TONPli PITCH) switch 19 becomes effective when a plurality of tones (tones) are recorded, and determines the pitch for each tone. Its operation method is the same as that of the master chain switch 18, and when the LBD 19-1 is lit, the fine switch 15. '15 course using volume 16 @Edit wave section general (GEN)
The start switch 20 and end switch 21 are used to specify the start address and end address of the waveform generated as a musical tone. When LgD20-1 and LgD21-1 are in the lit state, the fine switch 15.15 (!:
This is performed using the course volume 16 and displayed using the tone map LED 14 and value LBD 17.

Further, a repeat (REP) start switch 22 and an end switch 23 are used to designate the start address and end address of a repeated portion for repeatedly reading out a portion of a stored waveform.
are in the lit state, respectively, fine switches 15 and 1
5. The coarse volume 16 is used, and the display is performed using the tone map LED 14 and the value LED t7.

Vibrato speed of Edit Wave Seven Combs 1,
Depth (DEPTH), each delay switch 24,
25 and 26 determine the speed, depth, and delay time or presence/absence of vibrato. When each switch is operated, LED 24-1.25-1.26-1 lights up, and in that state, the fine Input each parameter by operating the switches 15, 15 and course volume 16. 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. , when the respective switches 27, 28, 29 and 30 are 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 switches 15, 15 and the coarse polyneme 16, each parameter can be manually set digitally.At that time, the value of each parameter is displayed on the value LED 17.

In addition, in this embodiment, the relationship between the keyboard of the connected keyboard instrument and the output musical tone can be variably set, and the center switch 31 corresponds to which position (scale) on the keyboard the recorded external sound is placed. The width (WIDTH) switch 32 determines the f\A area on the keyboard of the corresponding sound, and the touch (TOU)
CH) switch 33 determines the sound production range of the sound according to the key touch (speed), and each switch 31
．． When 32.33 is operated, LID31-1.32-
1.33-1 lights up, and in this lit state, use the fine switches 15, 15 and coarse volume 16.◎ In other words, when operating the center switch 31, operate the fine switches 15, 15 and coarse volume 16. The scale name to be associated is displayed numerically on the value LED 17, and when the quiz switch 32 is operated, the upper and lower limits of the scale to which the note is assigned are displayed in 4 digits, such as HXX or L, on the value LED 17. This is done by displaying the following.

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

Also, when the touch switch 33 is operated, the fine switches 15, 15 and the coarse volume 16 are operated.
The upper and lower limits of key touches to which the sound is assigned are determined,
Value LED 1 above as H rice or L* rice
7, the input level is displayed. In addition, the upper limit,
The lower limit input is determined by continuous operation of the touch switch 33.

In the midi section of the operation switch panel l, there is a play switch 34.
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 relay 35 mentioned above.

Also, the check switch 36 automatically produces the sound displayed on the tone LHD 13, allowing the user to hear how it was input and stored, and the status is displayed on the LED 36-1.

From the out dot terminal 37, the play switch 34 is connected.
or when the check switch 36 is operated, the output f scale note No. 9 is sent to an external amplifier and 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 is composed of a microprocessor and executes various processing controls to be described later.

This CPO 38 has a work memory 39 having a memory area used for controlling various processes, and a pass line B.
0 or cpuas connected via BtlS is connected to 4 channels (CI(0-C) via pass line CBtJ8
)13) Waveform read/write control section 40-0 to 40-
Connected to 3. These four channel waveform read/write control units 40-θ to 40-3 may have separate hardware, or may be
It may also operate as a channel.

And this 4 channel waveform read/write) 1i
tll au 40-0~40-3 C, recording me%
The address signal (ADDRE
SS) is given via the pass line DBUS, and data is exchanged with the recording memory 41 via the pass line BBU.
Also, a read/write signal (R1/W) is output to the recording memory 41 in a time-division manner.

Therefore, waveform read/write control! 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 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 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 to digital No. 14 and converts it into the above-mentioned signal. Waveform read/write control section 40-
0 to 4O-3 (actually, channel CH as described later)
Waveform read/write control corresponding to O, CH1 1%40
-0.4O-1) and is stored in the R address area of the recording memory 41.

Further, the digital signals read from the recording memory 41 and outputted by the waveform read/write control units 40-θ to 40-3 are rigidly applied to the D/A converter 431,
Sample and hold (S&H) after being converted to ANAMIG signal
) are applied to circuits 44-θ 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 mgs 40-Q to 40-3 in a time-division manner and to the channel lines, respectively. ' And each sample hold (1M44-0~44-:
IF) Output, VCA45-0 to VCA45-31c perform amplitude envelope control to perform mixing (MIX
ING) circuit 46. That is, VCA4
5-0 to 45-3 perform envelope control by converting the envelope control signal given from the CPO 38 into a voltage signal by the D/A converter 47 and supplying the same.

Note that there are four D/A converters 47, each with a voltage of 17) V.
They are arranged correspondingly to CA45-0 to CA45-3.

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 mode. That is, in the recording preparation state, as shown in FIG. 3, an external sound signal is input and recorded in the last block of the recording memory 41 (area from ■ to ■ in the drawing), and a trigger signal is actually applied. The external sound signal is recorded until the The @ area from ■ to ■ will be referred to as the delay trigger area.0 When the record mode is entered, the LED 8-1 lights up.

In this state, when the trigger is applied, it actually happens! 19
Start. There are three ways to apply this trigger, one is called Auto Trigger, which generates a trigger signal when the external sound (No. 1) exceeds the basic level set with trigger level volume 6. The second type is operated by an external trigger signal input via the trigger in terminal 4.
Thirdly, the operator himself generates the trigger signal by operating the trigger switch 10.
The second method above is an external trigger (Exte
rnalTrigger) (!: Call the third method as manual trigger.
r ). Note that the first trigger type and the other trigger type are, for example, trigger level volume 6.
A range to which no auto trigger is added is provided, and when the trigger level volume 6 is located at such a position, only one of the second and third trigger types is 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 the record switch 8 is operated, step S
1, the CPO 38 sets the waveform read/write control unit 44-0 of the channel CHO to the address ``■'' shown in FIG. 3 as the recording start address, sets the address ``■'' as the loop start address, and starts the loop. Set the end address to the address marked ■, and then set the loop on state. That is, the waveform read/write control section 4
4-0 (Waveform read/write control section 4 of other channels
4-1 to 44-3) can repeatedly read/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.

After that, the process proceeds to step Ss, and the channel CH
A command is given to the Q waveform read/write control unit 44-0 via the pass line CBUS to start recording. Therefore, the external sound signal input through the microphone-in terminal 3 is sampled, converted into a digital signal by the A/D converter 42, and sequentially written into the recording memory 41. @5 Figure (A) shows this state, in which the external sound fH is repeatedly recorded in the delay trigger area (area from addresses ■ to ■). Note that when recording is repeated in the same area, previously recorded signals are erased and only the latest human signal is recorded.
For example, this delay trigger area has 100 m5e
The external sound signal of c is now recorded. By recording the external sound signal in advance in this delay trigger area, the actual rise of Nf after this becomes natural.

Next, the process proceeds to step 8m, in which the waveform read/write control section 40-1 of the channel CHI is set with the address {circle around (2)} shown in figure m3 as the recording start address, and the address {circle around (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 above-mentioned auto trigger, external trigger, and manual trigger methods.If the judgment is No, step S4
Repeat step 4 and if the trigger signal is input, Y
After the ES determination is made, the process proceeds to the next step 8g.

In this step Ss, the waveform read/write control section 40-0 of the channel CHO is instructed to stop recording.For example, the address increment is stopped at the position indicated by the fifth K (A) CHO.

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
0 to start recording from address ■ in the figure, and then proceed to step S, where it is judged whether the address specification of the waveform read/write control section 40-1 has been made to the position O in Figure 3 in this case, and No. If so, repeat step S6, and when the final address is reached, make a Yes judgment and proceed to the next step S7. In other words, in this step 8, as shown in FIG. Transfer the data in the area to the predetermined area of the work memory 390. In this case, D in the same figure
Since the data in area NF was recorded before the data in areas A to C, data D and F are transferred first, followed by data A and C, and the arrangement order is is changed, and then recorded in the first block of the S recording memory 41, that is, areas 1 to 2, in the state shown in FIG. 5(C). As a result, in this recording memory 41, external sound signals are digitally recorded in areas ① to @.

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 Dll-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, cpuas appropriately specifies the recording start address and recording end address to the waveform read/write control units 40-0 and 40-1, and causes them to record. FIG. 6 shows a state in which the waveform information of tone 1 to tone 50 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 storage area of the tone is displayed on the tone map LgD14.

Then, operate the clear switch 9 to turn on the tone LED.
The waveform information of the number displayed at 13 and the numbers after it are deleted. Thus, for example, tone LED
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 sound signal can be recorded.Then, the signal input in this way is sent from the CPU 38 to the waveform lead/signal by operating the check switch 36.
The write control unit 40-0 is instructed to sequentially access the data, which is output one after another, converted to an analog signal via the D/A converter 43, and appropriately amplified by the VCA 45-0. O is output from the output device 37 and is sounded.
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.

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. That is, each data is stored in the order of tone number,
For example, in the tone 1 area, the following data is CP
The start block number (8TARTBLOCK) is stored in the work memory 39 under the control of U38.
Specify the first block in which tone 10 waveforms are stored, and specify the end block number (END
BLOCK) specifies the final block in which the waveform of tone 1 is stored. With these two pieces of information,
The tone map LED 14 is displayed.

The next data, that is, the general start block number (OWN 8TART BLocK-$), specifies the pull address at which to start actual sound generation, and the next general start address (GEN ST
A RTA D) specifies a lower address within a block. This value is the general start switch 20
After the operation, settings are made using the fine switch 15.15 and the coarse volume 16. 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 BLOK) and general end address (GEN END ADR8) are set using the fine switch 15. after operating the general end switch 21.
15 (!: Input using course volume 16.

FIG. 8 further shows that the position of the general end input in this way can be freely taken.

Also, the repeat stand stored in the next area
Topook number (REP 5TART BLO
CK sub), repeat start address (REP
5TART ADR8) is set using the fine switch 15.15 and coarse volume 16 after operating the repeat start switch 22, and is the start position when repeating a specific area of stored waveform information. Specify. Similarly, the repeat end block number (RWP END BLOC
K kon), repeat end address (REP END
ADR8) After operating the repeat end switch 23, fine switches ts, ts and coarse volume 16
This is used to specify the end position of a specific area of waveform information.

This tank is as shown in Figure 9, and during actual performance, it is used as a general start (GEN 8TA).
The waveform read/write control vIJ units 40-θ to 40-3 access the waveform information from the repeat start position (RT) 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. , 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 (TONE PITCH) recorded in the work memory 39 of the F7tA is set by operating the tone pitch switch 19, the fine switch 15, and the course volume 16, and this setting information and the master tune switch 18 Reflecting the setting information from the operation, pitch (PITCH) C'' to C in FIG.
f) The frequency fg signal of the 12th:Fr floor of the specific occupancy is determined.

Work memory 39 keyboard center (KEY B
OARD CENTER) is the keyboard center switch 31f) after 8 works, fine switch 15, 15,
This is set by operating the course polyneme 16.
Determine which scale the recorded external sound signal should be associated with. The correspondence relationship is displayed numerically in the value ID17.

According to this keyboard center setting, pitch 04~
The C information changes and can give an S-like quality.

That is, for example, if the frequency of the external sound signal is fl, the scale specified at the keyboard center can be played.

Then, according to this keyboard center setting number, v
, the ability to rewrite the contents of pitches C1 to C in Figure 7), or by changing the correspondence with the scale when this information is actually read out, the frequency of each scale is set.

NextKEYBOARDWIDT
HL) and Keyboard with High (KEYBOARD
WIDTHH) is performed using the keyboard width switch 32, fine switch t5t15 and coarse volume 16. N is set, and the range used for the note is set corresponding to the scale note ζ. Note that the keyboard center -, keyboard with low, and high settings may be performed by operating the entry key of the keyboard connected via the midi-in terminal 35.

The next key touch low (KEY TOUCHL) and key touch high (KEY TOUCH) 1) are the fine switch 15.1 after the key touch switch 33 is operated.
5 and Mies 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 LEDI 7.

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 (SUS), and release (i(,EL)) 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 process, in which the CPO 38 reads out 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 7th cycle 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 3g (this is the pointer in the recording memory 41) is shown. (which changes in synchronization with the address counter of the waveform read/write control unit 40-0) 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 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 this step T4, Stella 112 makes a judgment of N.
o, the process proceeds to step Ts, and 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 T6, and the polarity flag is turned off.

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

In that case, the process of step T7 is executed following step Ts. In step Ty, F7 of the current pointer
It is judged whether the i width value data is less than or equal to a predetermined value Δ. That is, as shown in KI OIN, Yes is determined at step Ts 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 click sound will be produced. Therefore, the zero-crossing point detection process becomes meaningless. Therefore, at step Ty, N
When the determination of O is made, steps T1 to T6 are repeatedly executed until the next zero-crossing point. And step 7
When a Yes determination is made in the 11th address, the series of processing is completed, and the CPO 38 writes the value of the pointer at that time into the work memory 39 as the general start address, end address, repeat start address, and end address.

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, the step T corresponding to one step Tl is
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, and at step T4 corresponding to step T4.
, the polarity flag is turned off, the polarity flag is turned off in step Ts corresponding to step T8, the polarity flag is turned on in step T6 corresponding to step T6, and the polarity flag is turned on at step T! , T? The processing 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 the 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 four, high,
Assume that information as shown in Figure @12 is input as 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 Cm (the subscript indicates the octave number, the same applies hereinafter), and the keyboard width is C3. ~B3, the key touch is θ~127.

Similarly, the keyboard center of Tone 2 is C4, the keyboard width is Gs''~C6, and the key touch is 20~8.
0, the keyboard center of tone 3 is AM, the keyboard width is CsNBs, and the key touch is 81-1
27, the keyboard center of tone 4 is A4,
Keyboard width is F-~B4, key touch is θ~1
It is 20.

Then, according to the block υ1 in Figure 13, the CPU 38
inputs "1" into the flag register (hereinafter referred to as tone number register) that specifies the tone number (TONE -tj-), then proceeds to step U8, and inputs "1" through the midi-in terminal 35. It is judged whether the scale (NOTE) code inputted is within the range specified by With Low and With High of the tone 1 area of the work memory 39.

If Yes is determined in this step Us, 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 is within the key touch low and key touch high range of the tone 1 area of the work memory 39.

When a Yes determination is made 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 390 to any one of the waveform read/write controls 40-θ to 40-3. 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, convert as appropriate according to the octave information,
Waveform read/write control unit 40 for the specified channel
-0 to 40-3.

As a result, the waveform read/write control units 4o-1 to 4o-
3 reads the waveform information of the designated area from the recording memory 41 at a speed according to the pitch f# information and supplies it to the D/A converter 43.

The analog waveform signal output from the D/A converter 43 is processed by sample and hold circuits 44-θ to 44-34C.
Given, L or 6 after VCA45-.

~45-3. This VCA45-0~45-
3, digital information that changes sequentially according to the envelope attack, decay, sustain, and release data read from the work memory 39 and the input key touch information is transferred to one of the four D/A converters 47. It is given after being converted into an analog voltage signal by. Therefore, the C VCAs 45-0 to 45-3 not only apply a preset envelope, but 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 scale, and the key touch are specified in this manner, and the process proceeds to step U8.

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

Step [Js is for incrementing the contents of the tone number register, and after this process step U6
Then, it is judged whether or not the processing in steps Us to U5 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 U6, 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.
PU38 executes different channels CHO~CH30
Output musical tones are assigned to the waveform read/write control units 40-0 to 40-3 and generated.

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 with a key touch of 4o, the musical tone of tone 1 will be produced at a key touch level of 400.

Similarly, the information input from the midi-in terminal 35 is
If the key touch is 40 in s, tone 1 and tone 2
The two sounds are produced at the level of key touch 4o.

Further, if the information input from the midi-in terminal 35 is Cs and the key touch is 1oo, tone 3 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 pre-recorded waveform signals 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 Spirit. It is also possible to easily change the tone color by touching a key.

〔Effect of the invention〕

According to the present invention, it is possible to arbitrarily specify and cut unnecessary parts of the sampled and recorded external sound digital signal, so it is possible to use memory efficiently, and to temporarily store it in memory. Even if noise has been written, it can be removed.

[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, @
Figure 8 is a diagram to explain general start and change of end position. Figure 9 is a diagram to explain repeat start, change of end, and order of addressing during play. Figure 1O is waveform zero crossing. FIG. 11 is a diagram showing a 7-chard when detecting a zero-crossing point; FIG. 12 is a diagram explaining a keyboard with multiple tones and the assigned range of key touches; 1st
Figure 3 is a diagram showing a 70-chart for explaining the operation in play mode. 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...Coarse 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...
VC person.

Claims (1)

[Scope of Claims] External sound storage means for sampling input external sound and storing it as a digital signal; display means for displaying the storage status of the external sound storage means; It is characterized by comprising a designating means for designating an arbitrary part of the digital signal representing the external sound, and an erasing means for deleting the digital signal of the part designated by the designating means from the external sound storage means. Sampling equipment.