JP2728087B2 - Music signal generator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention
Are stored in advance, and this is given randomness.
The tone signal by switching the
The present invention relates to a tone signal generating device that generates a tone signal. 2. Description of the Related Art Japanese Patent Application Laid-Open No.
All waveforms from the start to the end of a note are stored in the waveform memory
By reading the waveform memory
Can produce high-quality musical tones that are very similar to natural musical instruments.
There is disclosed a musical sound signal generating device having such a configuration. That
In the method of storing the entire waveform in the waveform memory as
To reduce this because the memory capacity becomes enormous,
In the prior application, the waveform of the attack part was completely memorized.
However, the waveform of the sustained part after that is a typical one-period waveform.
Or, store only the multi-cycle waveform and read it repeatedly.
It is also disclosed that it protrudes. However, one lap
In the method of repeatedly reading out the initial waveform, the timbre changes over time.
The problem is that the waveform is monotonic,
The read-back method can prevent such monotony.
Is simply caused by the repeated tone change of the same pattern.
Tone is inevitable. Also, do not take the repetition cycle considerably long
And periodic noise corresponding to the repetition period
Problems arise. On the other hand, the specified repetitive waveform is read repeatedly.
When reading out, the read start
To change dresses randomly by address
There are also attempts to make them more random (eg
For example, JP-A-59-49597). However, readout
The more the start address is switched randomly in units of one address
After all, the waveform of the same waveform section is repeatedly used
It was nothing but enough. [0003] The present invention has been made in view of the above points.
The waveform data of all waveforms was stored in the waveform memory.
Without storing the data, a part of the
Can generate a relatively high-quality tone signal using
And saves waveform memory space.
If you enjoy the benefits, repeat reading as described above
The problem of periodic noise and the monotony of tone change
Trying to solve the problem. [0004] The first invention of this application
The tone signal generating device according to the
Waveform data of multiple waveform sections consisting of shapes were stored respectively.
A waveform memory, and a waveform section to be read from the waveform memory.
A waveform section group consisting of a plurality of predetermined waveform sections
Are switched randomly by designating from among
In this waveform section group to be randomly specified
At the time of generation of a musical tone.
Read sequence control means that changes as time elapses
Specified by the read sequence control means.
The waveform data of the multi-period waveform in the
Reading means for reading from the memory.
You. According to this, read sequence control
The means determines a waveform section to be read from the waveform memory in a predetermined manner.
From a waveform section group consisting of multiple
It is designed to be switched randomly and
Before in the waveform section group to be randomly specified
The combination of a plurality of predetermined waveform sections
Change according to the
Wave consisting of appropriate combination of waveform sections corresponding to the passage of time
Shape section groups can be randomly specified.
And random switching control that does not feel unnatural
It has an excellent effect that it becomes effective. sand
In other words, completely random without any ingenuity like this invention
If switching control is performed, for example,
The waveform section corresponding to the attenuated sound generation state
May be specified randomly
In that case, how can it be called random switching control?
It will make you feel unnatural,
Absent. On the other hand, according to the present invention, the random designation
Multiple waveform sections in the waveform section group targeted for
Change the combination of music according to the passage of time
To solve such problems.
You can. A tone signal generation according to the second invention of the present application
The raw device has a plurality of waveforms in which one waveform section has a plurality of cycles.
A waveform memory that stores the waveform data of each waveform section;
Cutting of the plurality of waveform sections to be read from the waveform memory
Multiple sequences set in different replacement order
Includes a sequence memory in which
Degree, one of the plurality of sequences
Select and specify the previous according to this selected sequence
Switching the waveform section to be read from the waveform memory sequentially
Read-out sequence control means for specifying
Of each waveform section specified by the sequence control means.
Reading the waveform data of the multi-period waveform from the waveform memory;
Read-out means. According to this, reading from the waveform memory
The switching order of multiple power sections should be set differently.
Sequence memory that stores multiple sequences
Each time a musical tone is generated,
One of the sequences is selected and specified.
Waveform to be read from the waveform memory according to the sequence
Since the sections are sequentially switched and specified,
Program the desired switching order in the
High quality by eliminating periodicity due to repetition
A waveform signal can be obtained, and each time a tone is generated,
The switching order can be selected from multiple sequences.
Is selected and specified by the tone generation opportunity.
The switching order will be different,
Waveform data of multiple common waveform sections stored in shape memory
Timbre changes in different time-varying manners while using
Sound that can be generated.
It will be fruitful. In this case, the waveform memory
There is no change in the waveform data stored in
So, not a completely different musical tone is generated,
While the basic tone is the same, the mode of its temporal change
A slightly different musical tone can be generated,
Moreover, the storage capacity of the waveform memory used for that purpose is small.
There are various effects such as elimination.
Each time a musical tone is generated, the switching order is selected and designated.
For example, use a random signal as a parameter for
Or the pitch of the sound generated at that time.
Data or key touch data may be used.
No. Further, according to the invention of this application, the same plural
Make sure that periodic waveforms are not read repeatedly.
Can eliminate periodic noise.
You. Also, the tone change is no longer a monotonous repetition,
Becomes Moreover, a plurality of waveform sections composed of a plurality of periodic waveforms
The resulting tone signal has a complicated waveform change.
And high quality. Moreover, the waveform
The capacity of the memory can be reduced compared to storing the entire waveform.
Can be. BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The embodiments of the present invention will be described in detail. FIG. 1 illustrates the present invention.
One embodiment applied to a keyboard-type electronic musical instrument is shown.
Equipped with multiple performance keys to specify the pitch of the musical tone to be generated
ing. The key press detection circuit 2 detects a key press on the keyboard 1
And outputs a key code KC corresponding to the pressed key.
Key that keeps signal "1" for as long as the key is pressed
The ON signal KON and the signal "1" instantaneously at the start of pressing the key
A key-on pulse KONP is output. Explanation
For simplicity, the electronic musical instrument in this example is monophonic.
The key press detection circuit 2 has a single tone selection function.
However, it is possible to use a well-known key assigner to make it a double tone specification
Of course. Note clock generation circuit 3 detects key press
Based on the key code KC given from the circuit 2,
Generates note clock signal NCK of frequency corresponding to pitch
Live. The address counter 4 receives the note clock signal NC
K is input to the count input C, and this is counted.
Form an address signal AD for reading the memory 5
You. More specifically, it is formed by the address counter 4.
Address signal AD is a multi-period waveform for one waveform section
Is an address signal for reading out. The waveform memory 5 has one waveform section having a plurality of cycles.
The waveform data of a plurality of waveform sections
The wave of such multiple (specific number) waveform sections
Shape data is stored for each tone type. Waveform memo
An example of the waveform section for one tone to be stored in the file 5 is shown below.
Then, as shown in FIG. 2, the tone signal of the tone
Multi-period wave from all waveforms from rising to end of pronunciation
A plurality of sets of waveform sections B0 to B5 (the
In the example, six sets of B0 to B5) are extracted. In addition,
When performing, the waveform section of the attack part consisting of multiple period waveforms
It is preferable to include at least B0. Extraction
The waveforms of the waveform sections B0 to B5 are encoded in an appropriate encoding format, for example.
For example, encoding by PCM (Pulse Code Modulation)
The encoded waveform data is stored in a predetermined storage area of the waveform memory 5.
To memorize. This storage format is shown schematically.
FIG. 3 shows the waveform data of each of the waveform sections B0 to B5.
Data is sequentially stored at successive addresses. One waveform section
The number of periods of the waveform extracted as
The data length of the waveform data in the sections B0 to B5, in other words,
The number of sample points also has its own value. In FIG. 3, L0 to L5 represent waveform sections B0.
A5 to A5 indicate the data length of each waveform section B0.
To which the waveform data of the first sample point of B5 is stored.
Address, that is, the start address. This starter
The waveform depends on the dresses A0 to A5 and the data lengths L0 to L5.
The storage area of each waveform section B0 to B5 in the memory 5 is specified.
Can be specified. In the following, each waveform section B0
Storage area of waveform memory 5 that stores waveform data of B5
The area is called "bank". For example, the waveform data of waveform section B0
Data is stored from the start address A0
This is a storage area with a starting data length LO. In Figure 3, one tone
Only the storage format of the other sounds is shown.
The same applies to mats. However, the data length of each waveform section
Is optional for each tone, and the memory location is different.
The tone address value also differs for each tone. The read sequence control means 6 controls the waveform
Designate by sequentially switching the waveform section to be read from memory 5.
To specify one waveform section to be read.
Output the start address designating signal SAD
You. This start address designation signal SAD should be read.
The start addresses A0 to A5 of the waveform sections B0 to B5
It is shown. This start address designating signal SAD
And the address signal AD from the address counter 4 is an adder
7 and the added output is the address input of the waveform memory 5.
Given to. This addition output (SAD + AD)
Individual sample points within one waveform section to be read
Absolute address is specified and stored at the specified address
If the waveform data at the sample point is
Is read from. The read sequence control means 6, for example,
A random number generator 8 that generates random numbers in the range of 1 to 5
And generated from this random number generator 8
The random numerical signal RBN is used to determine the waveform section B0 of the attack part.
Except for the numbers of the remaining waveform sections B1 to B5,
I am responding. This random numerical signal RBN is a latch circuit
9 is input. The reset input R of the latch circuit 9 is
-On-pulse KONP has been input and the key has started to be pressed
Resets the latch circuit 9. Output of latch circuit 9
Is a bar indicating the number of the waveform section B0 to B5 to be designated.
Data length memory 10 and start as link number BN
It is given to the address input of the address memory 11. Day
The data length memory 10 stores the data length L0 of each of the waveform sections B0 to B5.
To L5 are stored in advance for each tone type.
According to the tone color selection information TC given from the selection circuit 12
One set of data lengths L0 to L5 is selected, and the selected data length is set.
Banknan address input from the data length L0 to L5
The data length of one waveform section corresponding to BN (L0 to L5
One of them) is selectively read. Read data
The data length signal DL is applied to one input of the comparator 13 and the other input.
This is compared with the address signal AD applied to the force. Number of both inputs
When the values match (when AD = DL), the match output EQ
Outputs a signal “1”, and latch control of the latch circuit 9 is performed.
Input L and given to counter 19 for random range control
And the address counter 4 via the OR circuit 14.
Is applied to the reset input R. Where the address cow
Key to the reset input R of the
The ON pulse KONP is also input. The start address memory 11 stores each waveform section.
Set the start addresses A0 to A5 of B0 to B5 for each tone type
Is stored in advance for each tone, according to the tone color selection information TC.
One set of start addresses A0 to A5 is selected and selected
Address input from among the start addresses A0 to A5
Of one waveform section corresponding to the input bank number BN
Address (one of A0 to A5) is selectively read.
Will be issued. The read start address is the start address.
The address is input to the adder 7 as the
To the address signal AD output from the address counter 4
Is done. When key-on pulse KONP occurs,
Since the switch circuit 9 is reset, the bank number B
N is “0”, and during a plurality of cycles of the attack portion,
Is designated. That is, the data length memo
Re 10 reads “L0” as the data length signal DL,
The start address memory 11 stores a start address designating signal.
“A0” is read as the signal SAD. On the other hand,
Counter 4 is reset by the key-on pulse KONP.
Starts counting the note clock signal NCK
Then, the address signal AD is sequentially increased from “0”. A
When the dress signal A becomes equal to the value "L0" of the data signal DL.
The coincidence output EQ of the comparator 13 becomes a signal "1".
Bank switching (switching the waveform section to be read)
To instruct. A latch circuit 9 outputs a signal to a latch control input L.
Random numeric generator 8 at timing given "1"
Latch the random numerical signal RBN generated from
This is output as a new bank number BN. Accordingly
The second and subsequent bank numbers BN are the waveform sections B1 to B5.
The interval is specified at random. In addition,
Counter 4 is reset once by the output signal of comparator 13
Therefore, each time the waveform section is switched, the address signal AD
Is returned to "0" and the increase is repeated. Therefore, specified
Data length (L1) of the waveform section (one of B1 to B5)
To L5) as many as the number of address signals AD.
When it changes, the matching condition of the comparator 13 is satisfied and read.
The power waveform section is switched. These waveform sections B1 to B5
Corresponds to the output of the random number generator 8.
Have randomness. Also random number generator
Numerical value of random numerical signal RBN generated from 8
The range is the data RL from the random range designation memory 20.
Defined according to the time when the musical tone is generated
It is controlled. That is, a counter for random range control
19, the coincidence output signal of the comparator 13 is input.
Counter 19 counts the coincidence output signal of the comparator 13
Thus, the number of times of switching of the waveform section is counted.
The count value CV of this counter 19 is specified in a random range.
The random range designation memory 20
Then, according to the count value CV, the random range designation data
Read the data RL. This counter 19 is a key-on pulse
Reset by KONP. Therefore, the pronunciation of musical sounds
At the start, the count value CV is reset to "0".
As time elapses, that is, every time the waveform section is switched
Then, the count value CV is sequentially increased. Random range finger
The constant memory 20 has a random numerical value corresponding to the count value CV.
Data RL that specifies the range of
And store such data groups for each tone type.
Data group to be read according to the tone color selection information TC
Select Random range corresponding to each count value CV
An example of the specified data RL is as shown in the following table.
For convenience, the RL column shows the range of the random number itself.
The symbols B1 to B5 of the waveform section corresponding to the
Have been. [Table 1] [0018] The random number generator 8
Designated by given random range designation data RL
Random numbers within the specified range. According to the example in Table 1.
In this case, the number of times the waveform section is switched is in the range of 0 to 2,
The numbers 1 and 2 are randomly generated near the tack,
As a result, the waveform section B1 relatively close to the attack portion
B2 is specified at random. Switching of waveform section
When the number of times is 3 to 5, the numbers 2 and 3 are randomly generated.
And the waveform sections B2 and B3 are specified at random.
When the number of times of switching the waveform section is in the range of 6 to 8,
The values 2, 3 and 4 are randomly generated and the waveform sections B2 and B
3, B4 are specified at random. In addition, the waveform section
The number of replacements is 9 or more, that is, a certain time after the key is pressed
When the time elapses, numbers 4 and 5 are randomly generated,
Waveform sections B4 and B5 in the middle or near the end of the sustain part
Is randomly specified. Assuming that the time elapses when a tone is generated
Waveform sections can be switched completely randomly regardless of
In this case, immediately after reading the waveform section B0 of the attack part,
Waveform section B4 or B near or at the end of the sustain part
Since it is possible that 5 will be specified,
In such a case, it may bring unnaturalness
There is. However, as shown in the embodiment of FIG. 1 of the present invention.
According to such a random range designation control, the random numerical value
Limit the range over time, that is, the time when a musical tone is generated
The waveform section group to be randomly specified
By changing the loops accordingly.
Random control to avoid unnaturalness
it can. Still referring to FIG. 1, one waveform
While specifying the section, the start address specifying signal SA
D does not change, and the address signal AD is a note clock signal.
It changes sequentially according to NCK. As a result, the output of the adder 7
Force (SAD + AD) is the start of the specified waveform section.
Dress (one of A0 to A5) as a starting point
This address signal is incremented by one address.
According to the waveform data of successive sample points of the waveform section.
Are sequentially read from the waveform memory 5. Waveform memory 5
The waveform data at each sample point read from the
5 and from the envelope generator 16
The envelope signal is multiplied. The output of this product is
Analog-to-analog converter 17
And then given to the sound system 18
You. The envelope generator 16 has a fixed level, for example, during key depression.
Maintains a bell and decays with a predetermined decay characteristic after key release
Generates envelope signal in response to key-on signal KON
I do. Note that, in this case, the envelope generator 16
The color selection information TC has been input, and it corresponds to the selected tone.
Then, the decay characteristics of the envelope signal are set.
By the way, the envelope signal has no attack characteristics
The reason is that the waveform data of each waveform section stored in the waveform memory 5
The amplitude envelope characteristic of the original sound waveform in the direction shown in FIG.
Because it has the same nature, the waveform section of the attack part
The waveform data of the interval B0 contains the attack characteristic envelope in advance.
Envelope, with an attack characteristic in the later stage
This is because there is no need to perform an operation for specially assigning a loop.
However, the present invention is not limited to this.
Perform normalization processing in advance so that the amplitude is
The waveform data having the normalized amplitude level is stored in the waveform memory 5.
May be stored. In that case, the envelope
Attack, Decay, Sustain, Reli from generator 16
Generate an envelope signal that has all the characteristics
To do. Incidentally, in the example of FIG.
Random range with number (count value CV) as parameter
Is limited over time, but the timer circuit is not limited to this.
Attack or decay in the output of the
Parameters such as the status of a, sustain, release, etc.
To limit the random range over time (ie,
Change the waveform section group for which
It may be. FIG. 4 is a flowchart showing the read sequence control procedure of FIG.
Different read sequence control for stage 6
Do not perform random control by changing by means 21
An example of an electronic musical instrument, that is, a tone signal generator
It is shown for consideration. Same reference numbers in FIG.
The numbered blocks are the same as in FIG. This figure
The read sequence control means 21 in FIG.
Sequence in which the switching order of the intervals B0 to B5 is stored in advance.
Includes a sense memory 22.
The switching is controlled in accordance with the changed switching order. Counter 2
3 is the number of switching of the waveform section as in the case of the counter 19 in FIG.
And counts the key-on pulse KONP.
Therefore, it is reset, and the count input C
The signal of the coincidence output EQ is input via the gate 24.
The count value CV of the counter 23 is the address of the memory 22
Waveform of the order given to the input and corresponding to this count value
The bank number BN indicating the section is read from the memory 22.
Is done. This bank number BN is the same as in the embodiment of FIG.
The data length memory 10 and the start address memory 11
Given to address input. Bank sequence memory 2
Table 2 below shows an example of the stored contents of Table 2.
Read out corresponding to each count value CV (number of times of switching)
Bank numbers BN (B0 to B5) to be stored are stored.
You. Such storage of the switching order is not performed for each tone type.
That should be read out using the tone color selection information TC.
Sequence is selected. [Table 2] Switching of waveform section to be stored in memory 22
Set the order randomly so that it has as little periodicity as possible
Shall be. Also in this case, first, the waveform section B of the attack part
It is preferably 0. 1 sea that can be stored in the memory 22
Since the cans have a finite length, they reach the waveform section of the last rank
If you do, you need to take appropriate measures. For that purpose
And a count detection circuit 25 for detecting the count value CV.
Detects that the final value has been reached and outputs signal "1"
I do. The output of the end detection circuit 25 is
And is applied to the control input of the gate 24. Game
24 is always open and the coincidence output of the comparator 13 is output.
The signal is supplied to the counter 23 to determine the number of times the waveform section is switched.
Counting is enabled, but the count value CV is the final value
Is closed upon reaching, prohibiting further counting
You. Therefore, after reaching the waveform section of the last rank,
The waveform section is repeated, but one sequence length is
By taking long enough (by increasing the number of rankings)
Make sure that this does not happen during pronunciation time
Can be. FIG. 5 shows an embodiment of the second invention.
It is. The read sequence control means 31 of FIG.
4 as in the read sequence control means 21 of FIG.
Long memory 10, start address memory 11, comparator 1
3, bank sequence memory 22, counter 23, game
24, an end detection circuit 25, and an inverter 26
And the sequence read from the bank sequence memory 22.
The waveform section is switched according to the cans.
Furthermore, a random number generator 28 and a latch circuit 27 are added.
And randomly select the above sequence
It is something that has been done. That is, the bank sequence memo
Select the sequence (switching order) to be read from the
If you choose to have randomness
It is. Other operations in FIG. 5 are described in FIGS.
Since it is the same as that described above with reference to FIG.
The above description of No. 4 is cited. In FIG. 5, the same
The blocks with the reference numbers of FIG.
Are the same. However, the bank sequence shown in FIG.
In the memory 22, one sequence for each tone type
Instead of a plurality of sequences. example
For example, if you store three sequences for each tone
Then, an example of the stored contents is shown in Table 3 below.
It is. [Table 3] The random number generator 28 has a plurality of numerical values.
(When following the example in Table 3 above, for example, numerical values of 1 to 3)
Occurs randomly. Latch circuit 27 is generated by generator 28.
The random number generated is used as the key-on pulse KONP timing.
And outputs the output data RV to the memory 22.
I can. The memory 22 is selected by the timbre selection information TC.
From the latch circuit 27 of the plurality of
One sequence corresponding to the obtained numerical data RV
Select the bank number BN included in the sequence
The current count value CV of the counter 23 (the number of times of switching)
And read them out sequentially. Thus, the key-on pulse KON
For each pressed key corresponding to the occurrence of P (that is,
A sequence is randomly selected for each musical tone). In the examples of FIGS. 4 and 5, the bank sequence is used.
The sequence to be read from the memory 22
To be selected by the information TC or the random signal RV.
However, such as key touch data and pitch data
Sequence with other data or a combination of these
You may make it select. Also, the implementation of FIGS.
In the example, the data lengths L0 to L5 of the waveform sections B0 to B5 are
Since each was arbitrary, a data length memory 10 was provided.
I have. However, the data lengths L0 to L5 must be equal.
If each waveform section is selected, the data length memory 10 is unnecessary.
The data length signal DL input to the comparator 13 has a fixed value.
And it is sufficient. Also, the connection between adjacent waveform sections is
When switching waveform sections for smoothing,
At the end of the specified width of the waveform section
Interpolate between the fixed width start part according to the predetermined interpolation function
It is better to do it. The interpolation circuit for this is
Can be configured using interpolation techniques that are well known in the field.
The details are not described here. Recorded in waveform memory 5
The encoding method of the stored waveform data is limited to the PCM method described above.
No, differential PCM system, delta modulation (DM) system, adaptive
PCM system, adaptive delta modulation (ADM) system, etc. That
Other appropriate methods may be used. In that case, the waveform memory 5
The output side of the waveform memory read according to the encoding method
To demodulate the output (to obtain a PCM signal)
The demodulation circuit of FIG. In each of the above embodiments,
The present invention is suitable for generating the scale selected by the keyboard 1.
An example of using a rhythm sound is shown here.
The present invention can also be applied for generating (percussion instrument sounds)
Of course. Furthermore, in the embodiment, each waveform
Address signal A for reading the waveform data at the sample point
D is to count the note clock signal NCK
But it corresponds to the pitch of the pressed key.
By accumulating or adding or subtracting the frequency information values
May be generated. Also, the configuration of the waveform memory
In some cases, the address signal AD is
Note clock signal NCK without changing
Good. Furthermore, separate waveforms for each pitch are stored in the waveform memory.
When data is stored, the address signal AD
The pitch may also occur at a common rate of change. Ma
In the above description, the waveform memory 5 is physically one memory device.
The partial storage area is divided into each waveform section.
But it is physically separate for each waveform section.
The same is true even if multiple waveform memories are used.
Of the invention. As described above, according to the invention of this application,
For example, the read sequence control means reads from the waveform memory.
The waveform section to be output consists of a plurality of predetermined waveform sections.
Select sequentially from the waveform section group and switch sequentially
And is subject to this random designation
Of the plurality of predetermined waveform sections in the waveform section group
Change the combination according to the passage of time when the tone is generated
Appropriate for the passage of time when the musical tone is generated.
Waveform section groups can be randomly specified.
And random switching control that does not feel unnatural
The effect is excellent. According to another invention of the present application, the wave
Order of switching multiple waveform sections to be read out from shape memory
Memorize multiple sequences set in different orders
Sequence memory, and each time a tone is generated,
Select one of these sequences
The waveform memo is selected according to this selected and specified sequence.
Sequentially specify the waveform section to be read from the memory
The desired switching in the sequence memory
By programming the order,
It is possible to obtain a high-quality waveform signal without periodicity.
In both cases, each time a musical tone is generated, the switching order is changed in multiple ways.
Music is generated by selecting and specifying
The switching order selected and specified differs depending on the opportunity
Then, the common multiple stored in the waveform memory
When using the waveform data of the waveform section of
It is possible to generate musical tones whose tone changes in the inter-change mode
This is an excellent effect. Also in this case
Changes to the waveform data itself stored in the waveform memory.
There is no difference, so a completely different musical tone is generated
The basic tone is the same but its time
It will be possible to generate musical sounds with slightly different modes of change
Of the waveform memory used for that purpose.
Various effects such as a small storage capacity are required.
Things. Further, according to the invention of this application, the same plural
Make sure that periodic waveforms are not read repeatedly.
Can eliminate periodic noise.
You. Also, the tone change is no longer a monotonous repetition,
Becomes Moreover, a plurality of waveform sections composed of a plurality of periodic waveforms
The resulting tone signal has a complicated waveform change.
And high quality. Moreover, the waveform
The capacity of the memory can be reduced compared to storing the entire waveform.
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an electronic musical instrument showing one embodiment of a tone signal generating apparatus according to the present invention. FIG. 2 is a diagram illustrating an example of an original musical tone waveform and an example of a plurality of waveform sections that are dispersedly extracted therefrom. FIG. 3 is a diagram schematically showing a storage map of each waveform section in the waveform memory of FIG. 1; FIG. 4 is a block diagram showing, as an example, an electronic musical instrument obtained by changing the configuration of the reading sequence control means in FIG. 1; FIG. 5 is a block diagram of an electronic musical instrument showing one embodiment of a tone signal generating device according to the second invention of the present application. [Description of Signs] 1 keyboard 2 key press detection circuit 3 note clock generation circuit 4 address counter 5 waveform memory 6, 21, 31 read sequence control means 8, 28 random number generator 22 bank sequence memory

Claims (1)

(57) [Claims] 1.1 A waveform memory storing waveform data of a plurality of waveform sections whose waveform sections are composed of a plurality of waveforms, and a plurality of waveform sections to be read out from the waveform memory. is intended to switch sequentially specifying from the waveform segment group consisting of waveform segment randomly, the predetermined multiple of the waveform segment group to be the random designation
Reading sequence control means for changing a combination of a number of waveform sections in accordance with the passage of time when a musical tone is generated; reading means for reading the waveform data of the plurality of periodic waveforms of the waveform section specified by the reading sequence control means from the waveform memory; Music signal generator equipped with 2. 4. The tone signal generator according to claim 3, wherein the plurality of waveform sections are dispersedly extracted from all the waveform sections from the rise to the end of sounding of a desired tone signal. 3.1 A waveform memory in which waveform data of a plurality of waveform sections whose waveform sections are composed of a plurality of cycles are respectively stored, and a plurality of types of waveform sections set by changing the switching order of the plurality of waveform sections to be read from the waveform memory . Sequence
Includes a pre-stored sequence memory scan, each tone generating one sequence of the sequence number of ways plurality
Select specify a scan, the reading sequence control means for specifying sequentially switches the waveform segment to be read out from the waveform memory according to the sequence in this selection designation, the plural-cycle waveform of each waveform segment specified by the read sequence control unit A tone signal generating device comprising: a reading means for reading waveform data from the waveform memory.