JPH02183298A - Musical sound waveform generating device - Google Patents

Abstract

PURPOSE:To improve the economy by storing one waveform memory with waveform data on the same natural musical instruments which differ in frequency. CONSTITUTION:The waveform memory consists of a block which has areas with successive addresses and where waveform data obtained by sampling natural musical sounds of different frequency generated by the same natural musical instrument are stored in specific order and blocks of the same constitution with the block which has successive addresses. Then a 1st counter 5 specifies read blocks of the waveform memory 1 in order and then waveform data are read out of the same areas of the respective blocks to reproduce a musical sound. Consequently, a musical sound of timbre corresponding to a sound range is generated by using the one waveform memory to improve the economy.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a musical sound waveform generator 6, which is suitable for electronic musical instruments and which is capable of generating musical tones with different tones for each range. This invention relates to a waveform generator.

(Prior Art) Conventionally, digitally processed electronic musical instruments (J3) sample natural musical sounds from natural instruments such as wind instruments and stringed instruments, store them in a waveform memory, and sequentially recall the stored waveform data. There are some that generate the eastern sound.

Such a conventional musical waveform generator 5A is equipped with a waveform memory, and a predetermined number of data are numbered by 1 for one cycle 101 of a predetermined fundamental frequency and stored in this waveform memory. When reproducing a musical tone, waveform data is read out from the waveform memory at a readout frequency based on the height of the 16th node to be reproduced.

Therefore, for example, in order to reproduce the 888th floor of Raku&, it is necessary to generate a clock with a readout frequency of 88 digits or a [cock signal generation circuit].

Furthermore, since a predetermined number of data are sampled in one cycle, the numbering frequency changes in proportion to the fundamental frequency of the stored waveform data. Therefore, when storing waveform data of a musical tone with a high fundamental frequency, it is possible to read out the waveform data at a high readout frequency and reproduce up to the 11th harmonic, which is higher than the audible frequency limit. Become.

Therefore, Japanese Patent Application Laid-Open No. 48-62367 and Special FF (
No. 5,389,415, etc., proposes a conventional musical waveform generator that can reduce one scale to 0 and does not generate wasteful harmonics.

In other words, in these proposals, the frequency of the musical tone to be generated will be 2-8 (one octave higher/lower).
The number of samplings of waveform data stored in the waveform data in fu is halved. In such a configuration, the readout frequency is the same for one instrument in each A-cube, and approximately the same blind quality can be obtained;
1205', : /; to the clock pulse of frequency J:
It is possible to reproduce all the musical tones of the 8th floor.

By the way, natural music r1 with a different tone may be generated from a natural musical instrument by changing the ^ of 8.

Is it easier depending on the pitch of the sound? ) and the slope of the growth curve (embe [] - b) of musical instrument prefecture width change.

When the tonal culms of musical tones are separated by one octave or more, the change in timbre becomes noticeable. However, in contrast to A1, in the conventional musical sound waveform generator described above, 14
It cannot change color.

The conventional musical instrument waveform generator 77 that reproduces such musical tones with different tones depending on the pitch with zero processing power is the special 17tl field (54-
It is shown in Japanese Patent No. 66824. In this proposal, we have multiple waveform menus, sample musical tones for each range, and sample τ1! ) The waveform data is stored in different waveform menus. When reproducing a musical tone, a selection circuit selects a waveform memory based on γIVi of the tone to be reproduced. By reading the waveform data from the selected waveform menu, each range f
It is now possible to generate different blue musical tones in the U.

However, this proposal requires a plurality of waveform memories for each sound tll, which is unreliable. Recently, the collection of \η bodies V4 has been improved, and relatively large-capacity memories are being used as waveform memories. However, as mentioned above, when changing the number of samplings for each range, the unused portion of the waveform memory that stores low-frequency waveform data becomes large, making it extremely unused. There was a problem with PIC.

(Problems to be Solved by the Invention) In this way, the conventional Raku8 waveform interpolation device described above can reproduce the r1-color N11 at a low cost for each 1F2 flj. In order to do this, there was a problem with DJs who had to store waveform data for each of the 8 regions in different waveform formats, which was extremely frustrating.Also, the number of readouts and Easy to reproduce) “)? 5. When the rimbling frequency was set in inverse proportion to the 21st part of the musical tone in consideration of quality, there were problems such as the waveform ending having many peaks and rivers, making it unreliable.

In view of this problem, the present invention provides b ct' with C<'.
)-c, it is possible to generate musical instruments of 8 colors depending on the range using one waveform menu, and there are 71 waveforms that can improve playability. The purpose is to provide a generator.

[Structure of the Invention] (Means for Solving the Problems) The musical sound waveform generator according to the present invention generates a plurality of areas with consecutive addresses, and generates one sill of light from a natural musical instrument.
In order to sample a plurality of natural musical tones whose frequency corresponds to the phase 1j at the same ringing frequency, J, 1r, l
a block in which the waveform data to be stored is stored in a predetermined order in the plurality of areas, and a plurality of blocks having the same configuration and consecutive addresses;
A waveform menu 7 in which waveform data of one natural musical tone is stored in a predetermined number of blocks with consecutive addresses, and a mill 7 in which a type of clock corresponding to the number of the plurality of areas is generated.
913, and the first block that specifies the address of a series of blocks in which the waveform data of one natural musical tone has been stored.
counter and! 1'l i'iL! A second counter that can count the clocks of the above-mentioned area and specify all the addresses of the area in which the waveform data of the I4 low frequency natural musical tone is stored among the plurality of areas. Among them, data indicating the area corresponding to the eighth pitch of the musical tone to be reproduced is collected, and based on this data, the address of the area corresponding to the eighth pitch of the musical tone to be reproduced by changing the count value of the second force/kunta. and address translation means for specifying the address.

(Function) In the present invention, the waveform data of one natural musical instrument is stored in a predetermined number of blocks, and each block is divided into a plurality of areas, and each area has one. A large amount of waveform data is stored from natural musical sounds of different frequencies of the same natural musical instrument. The address conversion means converts the counter output from the second counter into one corresponding to the address of this area by introducing data of an area corresponding to the height of 8- of the Raku 6 to be reproduced. By sequentially specifying the reading blocks of the waveform memory by the first counter, the waveform data in the same area of each block is sequentially read out (and reproduced). Therefore, +j'i'L
! Even musical tones with eight different colors associated with i can be easily reproduced. However, since one waveform memory stores the waveforms of a plurality of natural musical tones of different frequencies of the same natural musical instrument, it has extremely high universality.

(Example) Hereinafter, a detailed description of the present invention will be given with reference to the drawings.
This is an explanatory diagram showing the (8 formations) of the waveform menu 1. In this embodiment, for example, approximately 8A cubes (88￥4) from △f to 08 1) Nozu: There is a sloppy C that is adapted to the Denryona instrument that reproduces the combination of natural instruments in the 1 range.

As shown in the second UA, the waveform list 1 includes a plurality of blocks [l].
The waveform data for one natural piece is composed of a series of 7 dresses from the start block to 6 pieces! It is stored in a number of blocks. Each block is divided into 0th to 7th regions for each octave, and each region stores waveform data obtained by limbering a predetermined frequency of a natural musical tone. That is, for one natural music γ5, different waveform data for each octave is stored in each area. Each block is composed of 2 words, and the Oth to 7th areas are people 102/l-, 512, 256, 128, 64, 32
It consists of 16.8 words, of which 8 words are unused. The sampling data is M-digitized (~Several 8 Gotsu) - (1 word), and the sembling frequency is inversely proportional to the frequency of the musical tone.If the frequency is 27.511z
For fl of A0, C, 1024 pieces of data are sampled and stored in the τ0th area. Regarding A1 to A/'s 1, it is approximately 512.256.128.
64.32 and 16.8 data are sampled and stored in the second to seventh areas, respectively. J3, the addresses of the 0th to 7th areas are consecutive.

Also, Ao to A1 (hereinafter referred to as 0th octave)
Raku 13 is played by reading the waveform data stored in the O-th area, and musical tones A1 to A2 (hereinafter referred to as the 1st A-cube) are played by reading the waveform data stored in the 1st area. do. Similarly, A
Each of the four octaves 2 to 8 is defined as the 215th to 7th octave, and by reading out the waveform data of the 2nd to 7th areas, musical tones A2 to C8 are reproduced.

At J3 in FIG. 1, reading of waveform data from the waveform memory 1 is performed based on the clock signal generation circuit 2's lock. The clock signal generation circuit 2 receives information on the pitch of the musical tone to be generated from the CP LJ (not shown) via the data bus 3, and receives a control signal R4 from the CPLI.
It outputs octave data and a clock based on the pitch of the generated musical tone. The octave data indicates which of the octaves 07'Ill to 7th octave the generated musical tone is included in, and is supplied to an address conversion circuit 6, which will be described later. The clock is output at a frequency corresponding to each pitch name fci, and is supplied to clock terminals CK of counters 4 and 5.

The timing control circuit 3 receives the output from the CPU.
It is controlled by a ++1 start signal R2, a sound generation stop signal R3, and a count overflow signal R7 from an envelope counter 14, which will be described later, and outputs a clear signal to the clear end C[ of the counter 4.5, and also outputs a clear signal to the clear end C[ of the envelope counter 14. also gives a clear signal.

The counter 4 has a number of bits that can specify all addresses in the O-th area of the waveform memory 1. That is, in this embodiment, the count output of the counter 4 is represented by 10 bits, 0th to 9th bits (30 to 89). The rear signal from counter 4G is at a high level (hereinafter referred to as "l-bi'"
When the clock goes from low level (hereinafter referred to as "L") to low level (hereinafter referred to as "L"), the clock starts counting, and when the A-bar flows, a carry signal is output and the count is counted up from 0 again. Based on the octave data, the address conversion circuit 61 converts the count outputs SO to S9 of the counter 4 into
Addresses within each block of waveform message 1 (hereinafter referred to as lower addresses) are converted into designated J' bO to bO and output.

The start block address register 7 indicates the start block 0 of the control signal R1 and waveform method 1 from the CPU.
Star Dob
The start block data of is output to the counter 5. The end block address register 8 receives the control signal R5 and the end block data indicating the end block of the waveform memory 1 from the CPU, and issues a signal [SUT\\!]. It is designed to output the end block data of the sound to the coincidence detection circuit 9.

The counter 5 outputs a count output to the waveform memory 1, thereby determining the address of each block of the waveform memory 1 (hereinafter referred to as the upper address). The counter 5 sets the start block data from the start block address register 7 to 131 people as the initial value of the count value.
Clear (When No. 9 changes from "T1°' to L", it starts counting operation. Also, the counter 5 is controlled by the force "kundabu enable", and VJ is applied to the enable terminal EN. The counter 5 specifies the upper address of the waveform memory 1, the address conversion circuit 6 specifies the lower address, and the waveform memory 1 is incremented at the fall of the enable time signal. is now read out.

When the count output of the counter 5 and the end block data from the end block address register 8 match, the match detection circuit 9 outputs a match signal of F1''.The match signal is sent to the inverter 10. is inverted and supplied to the AND circuit 11.AND circuit 11
is the inverted signal of the coincidence signal, from counter 4:'f:
t/ri-1 signal and the block switching signal BCG (described later)
is input, and an enable signal is output that turns the counter 5 up from 1 to 1. When the output of the counter 5 matches the end block data, the AND circuit 11 no longer outputs an enable signal.

The waveform data read out from the waveform menu 1 is given an envelope and output. The envelope memory 12 stores, for example, 64 ripples of envelope data based on the envelope of Rakuten 1. The application of the envelope is performed based on the clock from the envelope counter cock light generation circuit 13. The envelope clock generation circuit 13 is supplied with data from the CPU via the data bus 3, and is controlled by the CPU's control signal R6 to generate a clock of a predetermined period. This clock is supplied to the clock end CK of the envelope counter 14.

The envelope counter 14 is connected to the envelope memory 12.
It is composed of the number of pits ([00 to [6 bits of Q5)] that can read the 64 bits of data, and when the clear signal changes to
Start count-up from []-pu memory 1
Define t addresses of 2. envelope counter 14
When overflows, count A-barf [two l-
Signal 1″?, 7 to timing L'l lllll circuit 3
As a result, the timing control circuit 3 outputs a clear signal to stop r: sound generation.

In other words, 'J! The sounding time of N is set by the counter 14. Note that by making the clock frequency of the envelope counter clock generation circuit 13 variable,
You can control the pronunciation time. Envelope data of envelope mono 7ri 12 is count output EQO
to EQ5 are sequentially read out and introduced into the tI circuit 15. The multiplication circuit 15 adds an envelope to the waveform data by performing fL calculation on the waveform data from the waveform list 1 and the -envelope data from the envelope memory 12, and outputs the waveform data with an envelope.

The count output of the envelope counter 14 [a predetermined one bit of QO to EQ5 [Qx] is also supplied to the block switching signal generation circuit 16. The block switching signal generation circuit 1G is composed of flip-flops 17 and 18 and an AND circuit 19. Flipf [J Tsubu 1
7, the counter output EQx is supplied to the data end 1],
Carry number 15 of counter 4 is supplied to clock terminal C. The count output [Qx of the rising timing of the flip-flop 1741 tree signal is output from the output terminal Q to the data terminal of the register flop 18 and one input Q5 of the AND circuit 19 as the output EQX1. Flipf [j Tsubu 181. A carry signal is introduced into the clock terminal C, and when this carry signal rises, the human input EQx1 to the data @D is inverted and output [Ox2 is outputted from the output EiQ to the other input terminal of the AND circuit 19. It is supposed to be done. AND circuit No. 19, output EQx1.
When L'Qx2 is ')-1'' at the same time, the block switching signal BCG is output to the AND circuit 11.

The block switching signal generation circuit 10 generates a count output.
One block switching signal 138 per rising edge of EQX
cG will be output, and furthermore, the AND circuit 11 will limit the count output [Qx to one cycle width of the carry signal all+ and will introduce it to the counter 5 as an enable signal.

FIG. 3 is a circuit diagram showing a specific configuration of the address conversion circuit 6. As shown in FIG. For convenience of explanation, the addresses of the first area of the waveform memory 1 are referred to as OH to IF F l-i, and hereinafter, the addresses of the second to seventh areas are G, 1200+4.
to 3 doors 1 (.

The decoder circuit 20 indicates the Oth to seventh octaves.
A octave data is given. The decoder circuit 20 has terminals 01 to 07 corresponding to each octave. Only the terminal indicated by the octave data becomes "HIt", and the others become "1-". For example, when octave data indicating the third octave is introduced, only terminal 03 becomes "H'°, and terminal 03 becomes "L".
The inverting input terminals of AI to AI are connected to terminals 01 to 07 of the decoder circuit 20, and the other input terminals are connected to the 9th to 3rd bits (89 to C8) of the count output from the counter 4.
3) People are introduced. Off 1 circuit 131. '[32 is connected to the outputs of terminals 03 to 07, the off circuit B3 is connected to the outputs of terminals 04 to 07, the OR circuit B4 is connected to the outputs of terminals 05 to 07, and the OR circuit is connected to The output of terminal 06.07 is introduced into B5. The OR circuit 86 inputs the AND circuit A1, the OFF circuit B1, and the output of the terminal 02, and outputs the lower address b9 of the waveform memory 1.

, OR circuit B7 compares the outputs of AND circuit A2 and OR circuit [32] and outputs lower address b8. The OR circuit B8 introduces the outputs of the AND circuit Δ3 and the OR circuit B3 and outputs the lower address b1. The OR circuit B9 inputs the outputs of the AND circuit Δ4 and the OR circuit B4 and outputs the lower address b6. The A circuit 810 interpolates the outputs of the AND circuit A5 and the OR circuit B5 and outputs a lower address b5. OR circuit B11 goes to AND circuit 〇 and terminal 01
The lower address b4 is output based on the output of the address b4.

Further, the output of the AND circuit Δ7 becomes the lower address b3.

Therefore, based on the octave data, the lower address b
3 to b9 will be fixed. For example, the decoder circuit 20 receives octave data indicating the fourth octave.
When one person is taken, only Qryo-04 becomes “(1”),
From the OR circuits B6 to B8, ')I'' (logic PI' l+
The lower addresses b9 to b7 of (f"'1") are output, and the lower address 1)6 of "L" (logical value "0") is output from the OR circuit B9. Lower address b3 to b5
is determined by the count outputs S3 to S5 of the counter 4. In this way, the count outputs SO to S9 of the counter 4 can be converted to lower addresses bO to b9 and output.

Table 1 below shows the correspondence between each octave and the fixed lower address.

Table 1 Next, the operation of the embodiment apparatus configured as described above will be explained with reference to FIGS. 4 and 5.

Furthermore, again! [The waveform data of the musical tone you are trying to carry is stored in three blocks: the start block, the second block, and the Lnd block. The generation operation will be explained. The 411th timing of the carry signal generation ('1) is shown in Fig. 4 (a>
shows the count output [Qx, FIG. 4(b) shows the -1-yy signal from the counter 4, and FIG. )
shows the output rQx2 of the flip-flop 18, FIG. 4(e) shows the block switching signal BCG, and FIG. 4(f) shows the block switching signal BCG.
indicates an enable signal.

The Noritsubu flop 17 outputs the count output EQx at the data end from the output GWQ at the timing of the carry signal as shown in FIG. 4(b). Therefore, the count output E
At the first -V rise of the carry signal after QX becomes "1-1", the output EQx1 becomes 'l-1' (FIGS. 4(a), (b), and (c)). The flip 70 knob 18 inverts the input data D [Ox1] at the timing of the key signal and outputs it from the output terminal Q. Therefore, the output [
: At the first rise of the carry signal after QXl becomes '1', the output EQx2 changes from 'Tobi° to 111 IT'.
It keeps changing. Therefore, the output EQx1. The AND circuit 19 that inputs EQx2 outputs a block switching signal BC with a signal cycle width of 1 key 1/1 from the rising edge of the output EQx1.
G will be issued (Fig. 4(e)).

If the coincidence signal is "L", the AND circuit 11 outputs an enable signal during the period when the switching signal BCG and the two I□:p signals are "I-1" (FIG. 4 is (f)). ).

In this way, the enable signal with a signal width of 1 n = 1 is output from the AND circuit 1 once on the rising edge of the
Output from 1.

Next, the block switching operation will be explained with reference to FIG. Fig.5
- Indicates the relationship with the output of the counter 14! J explanatory diagram. In addition, in FIG. 55C, [QO7'J to [Q2 is omitted] to simplify the song.

In the three blocks from the start block to the end block of waveform memory 1, the envelope shown in Figure 1 is set to n1.
It is assumed that the waveform data of R& is stored. That is, the waveform data for period t1 is stored in the start block, the waveform data for period t3 is stored in the second block [2], and the waveform data for period t3 is stored in the first block. There is. Block switching is performed by counting up the counter 5 by the enable signal.
The enable signal is sent to the envelope counter 14.
It is generated at the rising edge of the count output EQx. Therefore,
To switch blocks after period t1 from the start of sound generation,
The fourth bit [04] of the counter output of the envelope counter 14 is applied to the block switching signal generation circuit 16.

Here, when the keyboard of the electronic musical instrument is operated, CP (J) supplies data based on the pitch of the tone of the musical tone γ1 to be reproduced to the digital signal generation circuit 2, and also starts operation based on the type of musical tone to be reproduced. A large amount of start block and end block data is given to the block address register 7 and end block address register 8. Also, the timing control circuit 3 is sent to the intermediate block address register 7 and the end block address register 8. The signal is changed from "1.1" to L11. Then, the J counter 4.5 and the envelope counter 14 start counting operations.

A counter 4 sequentially counts signals from the clock signal generation circuit 2 and outputs a count output to the address conversion circuit 6. Now, when reproducing the 0th octave's &, the address conversion circuit 6 outputs count outputs SO to 8.
9 is directly applied to the waveform memory 1 as lower addresses bo to b9. The counter 5 accepts the L start block and gives the upper address to the waveform memory 1, and the counter 5 accepts the L start block and gives the upper address to the waveform memory 1.
The 24 waveform data are read out in the Wjth order (clock frequency) at a frequency (clock frequency) corresponding to the high n of occurrence (given to one circuit 15).

On the other hand, envelope data is also supplied to the multiplication/latitude circuit 15. When the clear signal from the timing control circuit 3 becomes "L'', the envelope counter 14 counts the clock from the envelope counter clock generation circuit 13. The 6-bit counter output IEQO of the envelope counter 14 [Q5] The 64 envelope data stored in the envelope memory 12 are sequentially read out and sent to the UmD"4 circuit 15. The multiplying and sieving circuit 15 multiplies the waveform data by the envelope [1-b data], thereby adding an envelope f1 to the waveform data.
outputs the given musical tone signal. This musical tone signal is sent to a musical tone output section (not shown), and the musical tone γ1 is reproduced.

From the beginning of the sound of the instrument! By the time II II t 1 has elapsed, 1024 waveform data stored in the start block of waveform memory 1 have been read out, and 16 envelope data have been read out from the envelope memory. When 1iI1 time t1 has elapsed from the start of light combination, the count output [Q4 becomes "'H" (see FIG. 5).

As a result, from the block switching signal light main circuit 16,
The first key I after the count output IQ4 becomes “Tobi”
# When the signal rises, it becomes 'II' and carries 11.
Block switching signal BC with No. 1 cycle width r ``L''
G is output. At this point, the inverted signal of the match signal (
Since there is 11", an enable signal is input to the counter 5 at the leading edge of the block switching signal BCG.

When this happens, the counter 5 updates its count value, and the waveform memory 1 is given the upper address indicating the second block.

In this way, in the first half of period t2, 1024 pieces of waveform data stored in the Oth area of the second block of the waveform memory 1 are sequentially read out and given to the n-th power circuit 15, and the , 16 envelope data corresponding to the first half of period t2 are read out @
It is given to the smart circuit 15. Even in the second half of period t2,
Since the count output FQ4 does not rise, the count output of the counter 5 is not updated at this point. In the latter half of the period t2, the 1024 waveform data stored in the 0th area of the second block of the waveform menu 1 are read out again, and the 1024 waveform data stored in the 0th area of the second block of the waveform 1G pieces of −V envelope data corresponding to the period t2 are read out and applied to the ride circuit 15.

Furthermore, when 1 uI (tI + t2) has elapsed since the start of the tone generation, the re-count output [04 becomes '1-bi', the count output of the counter 5 is updated, and -[is stored in the 0th area of the tone block]. The waveform data will be read out.

When the output of the counter 5 indicates an end block, the coincidence signal of the coincidence detection circuit changes from "l" to "l", and the inverted signal of the coincidence signal becomes low.
”, and the enable signal is not generated. When a period of 1t1 + t2 + t3) has elapsed since the sound generation, ]-]
The envelope counter 1 overflows, a count overflow signal R7 is applied to the timing control circuit 3, the counters 4 and 5 and the envelope counter 14 are cleared, and the sound generation is stopped. In this way, the waveform data stored in the three blocks from the start block to the end block of the waveform memory 1 are read out (,
Octave musical tones are reproduced.

Next, a case will be described in which, for example, a musical tone of the fourth octave is reproduced. It is assumed that the waveform data of this musical tone is stored in three blocks, from the start block to the end block, and for convenience of explanation, the addresses of the fourth area are assumed to be 3808 to 3B'FH.

When the pitches of musical tones to be reproduced are the same, the clock frequency from the clock signal generating circuit 2 is the same, and the count output of the counter 4 changes sequentially in the range of 0 to ff11023. Count outputs SO to 89 are applied to address conversion circuit 6. The decoder circuit 20 of the address conversion circuit 6 is supplied with 9th and 4th octave and 1A octave data. As a result, the lower address b6 from the address conversion circuit 6 becomes "0" regardless of the counter output S6, and the lower addresses b7 to b91 become "1" regardless of the counter outputs S7 to \S9 (see Table 1). ).

Lower addresses b7 to b9 are 1″, lower address b6
is °゛0′”, so the lower address bO to 1)9
As a result, the address (380H to 38F)-1) of the fourth area of each block of the waveform memory 1 is specified. In this way, first, the 64 waveform data stored in the fourth area of the start block are read out primarily and applied to the multiplier 0 circuit 15.

Next, when the count output [Q4 of the envelope counter reaches "I"°, an enable signal is generated as described above, and the counter 5 designates the second block.

Then, the waveform data of the fourth area of the second block is read out and the multiplication circuit 15'c envelope is applied. The waveform data in the fourth area of the second block is read out twice as described above. Next, in the same manner, the waveform data of the fourth area of the end block is also read out to obtain the envelope.

This J-uni, in this example, J3 has the lowest pitch g.
Based on the octave data, the address conversion circuit 6 changes the count value of the counter 4 which can specify all addresses of the Oth area where the waveform data of No. 3 is stored. The readout is iiJ function. For this reason, one waveform memory is used to create different tones for each range) I/! You can play the name. Furthermore, since waveform data for a range of 1ti can be stored in one waveform memory, the unused portion of the waveform memory can be reduced. Since a different number of waveform data is stored for each sound range, there is also the effect that frequency noise can be reduced.

Note that the present invention is not limited to the above embodiments, and the configuration of the waveform memory, the configuration of the envelope memory, etc. can be modified.

[Effects of the Invention] As explained above, according to the present invention, ? Generates 13 different musical tones in each of the 3 regions.
It is extremely economical.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the musical waveform generator according to the present invention, FIG. 2 is an explanatory diagram showing the configuration of the waveform memory 1, and FIG. 3 shows the specific configuration of the address conversion circuit 6. Showing 1
FIG. 4 is a timing chart for explaining the operation of generating an enable signal, and FIG. 5 is an explanatory diagram for explaining block switching. 1...Waveform memory, 2...Return signal generation circuit,
4.5...) J counter, 6... Address conversion circuit,
11, 19...AND circuit, 12...Envelope memory, 14...Envelope counter, 16...Block switching signal generation circuit. Figure 2 Figure 5

Claims (1)

[Claims] Waveform data obtained by sampling a plurality of natural musical sounds having a plurality of consecutive addresses and having different frequencies generated from the same natural musical instrument at the same sampling frequency is It consists of blocks that are each stored in a predetermined order in an area, and a plurality of blocks that have the same configuration as this block and have consecutive addresses, and waveform data of one natural musical tone is stored in a predetermined number of blocks with consecutive addresses. a waveform memory; a clock signal generating means for generating a type of clock based on the number of the plurality of areas; a first counter specifying an address of a series of blocks storing waveform data of one natural musical tone; a second counter capable of counting clocks from the clock signal generating means and specifying all addresses of an area in which waveform data of a natural musical tone having the lowest frequency among the plurality of areas is stored; and a musical tone to be reproduced from among the areas. data indicating an area corresponding to the pitch of the musical tone is introduced, and address converting means specifies the address of the area corresponding to the pitch of the musical tone to be reproduced by changing the count value of the second counter based on the data; A musical waveform generator characterized by comprising: