JPH0422519B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a musical tone signal generating device capable of generating a musical tone signal having a timbre controlled according to a key touch or other timbre control factors, and in particular, In a musical tone signal generation device that appropriately weights and synthesizes a plurality of series of waveform signals having different characteristics, the weighting function can be switched according to the type of selected timbre. Regarding.

[Conventional technology]

The entire waveform from the start to the end of the sound, or the entire waveform at the rising edge and part of the subsequent waveforms are stored in the waveform memory, and if the former is stored, the entire waveform can be read out in one go to create a high-quality musical waveform signal. Recently, when the latter is stored, a high-quality musical waveform signal can be generated by reading out the entire waveform of the rising part and then repeatedly reading out part of the waveform after that ( Japanese Unexamined Patent Publication 1972-
No. 121313). Although this method of storing multi-cycle continuous waveforms in advance in the waveform memory can provide high-quality musical waveform signals, it requires a huge amount of memory capacity, so it is possible to It was unsuitable for realizing significant timbre changes.
In other words, key scaling control that changes the timbre according to the pitch and range of the musical sound to be generated, touch response control that changes the timbre according to the operation state of the performance keys (operation speed, operation strength), and various controls. (e.g. soft pedals and brilliance controls)
If you want to perform operator control that changes the tone depending on the operating state of the controller, the simplest way is to provide multiple waveform memories for each control content and select and read out one of them. Yes, but
This would complicate the configuration and at the same time increase the capacity of the waveform memory, making it impractical. Therefore, one method is to prepare two types of continuous waveforms in the waveform memory, for example, in the case of touch response control, a continuous waveform corresponding to the strongest touch and a continuous waveform corresponding to the weakest touch. It is conceivable to obtain a waveform corresponding to the timbre change parameter (touch intensity) by reading out and interpolating both waveforms according to the timbre change parameter (touch intensity).
163336.

[Problem that the invention seeks to solve]

By the way, in general, in natural instruments, the characteristics of timbre changes depending on the touch intensity or the characteristics of timbre changes depending on pitch and range are not uniform for all natural instruments, but rather vary depending on the type of instrument. Each instrument is different, and in addition to the constant timbre of the instrument, these timbre change characteristics indicate the unique characteristics of the instrument, and together they characterize the timbre unique to that instrument.

However, in the prior art including the above-mentioned prior application, the function characteristics for interpolation have not been determined in consideration of the timbre change characteristics unique to each natural musical instrument. Therefore, there is no choice but to use a common interpolation weighting function regardless of the type of timbre selected for the electronic musical instrument (which typically corresponds to various natural musical instruments such as pianos and guitars). Therefore, it is difficult to say that the conventional methods can faithfully imitate the timbre change characteristics of various natural musical instrument sounds in accordance with the unique characteristics of each.

This invention was made in view of the above points,
By making it possible to set the timbre change characteristics of musical sounds in response to key touches, key scaling, etc. to unique characteristics for each timbre type, a rich variety of timbre change characteristics similar to those found in various natural instruments are realized. The purpose is to make it possible.

[Means for solving problems]

The musical tone signal generating device of the present invention includes a tone selection means for selecting or specifying the tone of a musical tone to be generated, and tone control information for generating tone control information in accordance with a tone control factor for controlling the tone of the musical tone. generating means, and storing waveform data regarding first and second series of waveforms exhibiting different characteristics in correspondence with each timbre that can be selected or specified by the timbre selection means;
a waveform storage means from which the first and second series of waveform data corresponding to the timbre selected or specified by the timbre selection means can be read; reading means for reading out the waveform data, and inputting the output of the timbre selection means and the timbre control information, and generating weighting control data corresponding to the first and second series respectively in accordance with the inputs; The weighting control data changes according to the value of the timbre control information, and this change characteristic is determined according to a unique interpolation function corresponding to the selected or specified timbre, and the weighting control data changes according to the value of the timbre control information. and a second series, the weighting control data generating means exhibits change characteristics in opposite directions to each other, and the first series is obtained based on the waveform data read from the waveform storage means.
and weighting means for weighting the waveform signals of the second series according to the weighting control data corresponding to each series.

Further, a second feature of the present invention is that waveform data of a plurality of cycles regarding one series of waveforms having different characteristics is stored in the storage means as first waveform data, and the waveform data of both series are stored as first waveform data. The waveform data of a plurality of periods regarding the differential waveform corresponding to the difference between the two are stored in the storage means as second waveform data, and the waveform signal obtained based on the second waveform data is appropriately weighted according to the weighting control data. In a musical tone signal generating device that generates a musical tone signal whose timbre is controlled according to its weighting by combining it with a waveform signal obtained based on the first waveform data, the output of the timbre selection means and the timbre are combined. control information, and generates weighting control data that changes according to the value of the input timbre control information and whose function of this change is determined according to the selected or designated timbre; The reason is that it is equipped with control data generation means.

[Effect]

A weighting control data function is selected that exhibits a unique characteristic corresponding to the selected or designated timbre, and weighting control data is generated based on this function.
The waveform signals are weighted according to this weighting control data, and the weighted waveform signals are finally synthesized to obtain a musical tone signal. The timbre of this musical tone signal is subtly and variably controlled depending on the content of this weighting. Since the function of the weighting control data exhibits unique characteristics depending on the selected or specified timbre type, the timbre change characteristics realized thereby also differ depending on the timbre type. Therefore, it becomes possible to more faithfully imitate, for example, the timbre change characteristics of various natural musical instrument sounds in response to key touches, key scaling, etc., in accordance with the unique characteristics of each.

As an example, the weighting content of each series of waveform signals is determined in response to a key touch. As another example, the weighting content is determined depending on the pitch or range of the musical sound to be generated. As yet another example, the weighting content is determined depending on the operating state of the brilliance controller or other controllers. As a result, timbre change control is performed in response to key touches, key scaling, or operation of the operator.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is an electrical block diagram showing an embodiment of an electronic musical instrument to which a musical tone signal generating device according to the present invention is applied, and a keyboard is used as a means for specifying the pitch of a musical tone to be generated. Address signal generation circuit 1
1 corresponds to a reading means for reading waveform data from the waveform memories 12 and 13 according to the pitch specified on the keyboard, and inputs a key code KC indicating the pressed key from the keyboard circuit 10. , generates an address signal AD that changes at a rate corresponding to the pitch of the key indicated by this key code KC.

The first waveform memory 12 stores waveform data from the attack section and the sustain section or for a plurality of cycles regarding a waveform having a certain characteristic (hereinafter referred to as a first waveform). The second waveform memory 13 stores waveform data of a certain plurality of cycles from the attack section and the sustain section regarding a waveform (temporarily referred to as a second waveform) having characteristics different from the first waveform. be. Regarding the phase relationship of the waveform data stored in both waveform memories 12 and 13, for example, the attack part does not need to be particularly phase-aligned, but the sustain part may be adjusted in advance so that the phases of both series are matched as much as possible. The phases may be matched, or the sustain section may not be particularly phased. Alternatively, both the attack section and the sustain section may be phase-aligned.

In response to the key-on signal KON given from the keyboard circuit 10, the address signal generation circuit 11 first generates an address signal AD for reading out the waveform data of the attack section, and then generates an address signal AD for reading out the waveform data of the sustain section. Generates address signal AD. Waveform data is read out in parallel from the first and second waveform memories 12 and 13 and applied to multipliers 16 and 17 of the weighting circuit 15. The weighting circuit 15 weights the waveform data of each series according to the weighting coefficients (weighting control data) TK1 and TK2 generated corresponding to each series from the weighting coefficient generating circuit 18. That is, coefficient TK1 is input to the multiplier 16 to weight the waveform data read from the first waveform memory 12, and coefficient TK2 is input to the multiplier 17 to weight the waveform data read from the second waveform memory 13. weighting of the waveform data. weighted 2
The series of waveform data are additively combined by an adder 19.

The touch detection device 21 detects the touch of a key pressed on the keyboard and provides touch detection data TD to the weighting coefficient generation circuit 18. The weighting coefficient generation circuit 18 generates weighting coefficients TK1 and TK2 that indicate different weighting contents depending on the strength of the key touch indicated by the touch detection data TD.

In this embodiment, the first waveform memory 12 stores a waveform having characteristics corresponding to the strongest key touch, and the second waveform memory 13 stores a waveform having characteristics corresponding to the weakest key touch. is memorized. Therefore, in the weighting circuit 15, interpolation is performed between the waveform data corresponding to the strongest touch and the waveform data corresponding to the weakest touch according to the weighting coefficients TK1 and TK2 corresponding to the key touch, and as a result, A musical sound waveform signal having characteristics corresponding to the strength of the key touch at that time is obtained.

The waveform data output from the weighting circuit 15 is given to a multiplier 24, and an envelope generator 25
is multiplied by the amplitude envelope waveform data generated from . The output of the multiplier 24 is applied to a digital/analog converter 26, converted into an analog signal, and then applied to a sound system 27.

Next, specific examples of waveforms stored in the waveform memories 12 and 13 will be described.

FIG. 2 shows an example of the waveform (original waveform) of an actual piano sound played with a strong touch. FIG. 3 shows an example of the waveform (original waveform) of the same piano sound played with a weak touch. For convenience of illustration, temporally continuous waveforms are shown as a, b, respectively.
It is shown divided into four parts c and d. In general, it is difficult to determine exactly where the attack part begins and where the sustain part ends in a musical sound waveform, but
The attack section is from the beginning of the sound to the point where the waveform shape and amplitude become stable, and the section after that is the sustain section. Therefore, in FIGS. 2 and 3, approximately the portions a and b are the attack portion, and the portions c and d are the sustain portion. Of course, there is a range in how this division is made, and the part up to the middle of b may be used as the attack part, or part a may be used as the attack part, and the part after b may be used as the sustain part. Although not shown, the sustain section continues after d.

The first waveform memory 12 stores waveform data of a waveform consisting of multiple periods of attack portions corresponding to strong touches as shown in FIG. 2 a and b in a storage area corresponding to a piano tone, and then Waveform data of a waveform consisting of a plurality of cycles of a sustain section corresponding to a strong touch as shown in FIG. 2c and d is stored. In the second waveform memory 13, waveform data of a waveform consisting of multiple cycles of attack portions corresponding to weak touches as shown in FIG. Then, waveform data of a waveform consisting of a plurality of cycles of a sustain section corresponding to a weak touch as shown in FIGS. 3c and 3d is stored.

The waveform of the sustain section stored in both memories 12 and 13 may be the entire remaining waveform following the waveform of the attack section stored in the same memories 12 and 13, but is not limited to this, and may be a waveform of multiple periods extracted as appropriate. It may be a waveform or a typical one-cycle waveform. When storing all remaining waveforms up to the end of sound generation in the waveform memories 12 and 13, the address signal generated from the address signal generation circuit 11
Control is performed so that only one waveform data of the attack section and sustain section stored in the memories 12 and 13 is read out according to the AD. On the other hand, the sustain part waveform of a limited number of cycles or one cycle is stored in the memory 1.
2 and 13, the waveform data of the attack section stored in the memories 12 and 13 is read out once in accordance with the address signal AD, and then the waveform data of the sustain section is read out repeatedly. Since such readout control or repeated readout control of a series of waveform data can be easily performed by a well-known method, details thereof will not be particularly shown.

Each waveform memory 12, 13 has a
As shown in the figure, the original waveform itself with a natural amplitude envelope is converted into a predetermined encoding format (e.g.
The waveform data may be encoded using PCM (pulse code modulation method) and stored. In that case, in the envelope generator 25, as shown in FIG.
It generates envelope waveform data that maintains a constant level while the key is pressed and attenuates in response to the key release, as shown in FIG. As is well known, the attenuation envelope waveform at key release is for performing damp control at key release if the musical sound waveform in the sustain section has percussive tone-type attenuation envelope characteristics; If the waveform has a sustained-tone envelope characteristic (or if it actually has a sustained-tone envelope characteristic through repeated reading), the purpose is to attenuate the pronunciation when the key is released.

On the contrary, each waveform memory 12, 13 does not store the original waveform itself with a natural amplitude envelope, but performs data manipulation to normalize the amplitude level (peak level of each wave) of this original waveform to a constant level. is applied in advance (of course, the characteristics of each waveform are not impaired even if this is done), and the waveform with the standardized amplitude level is encoded in a predetermined encoding format (e.g.
The waveform data may be stored by encoding it using the PCM method. In that case, the envelope generator 25 generates envelope waveform data showing appropriate amplitude envelope characteristics as shown in FIG. Adds amplitude envelopes such as attack, decay, and sustain. The advantage of storing waveform data having a standardized amplitude level in the waveform memories 12 and 13 is that for waveforms whose actual amplitude level is relatively small, the level can be increased in appearance, so that the data representation can be improved. The number of bits can be increased, thereby increasing the resolution during waveform reproduction. Moreover, this can be done without particularly increasing the memory capacity.
This can be achieved by efficiently using memory.

Each of the waveform memories 12 and 13 stores waveform data of the above-mentioned attack section and sustain section for each type of timbre that can be selected or specified by the timbre selection device 28, respectively. The timbre selection device 28 outputs timbre selection information TC indicating the selected or specified timbre,
This is supplied to waveform memories 12, 13 and other circuits. The waveform memories 12 and 13 make it possible to read the waveform corresponding to the timbre specified by the applied timbre selection information TC, and read out the waveform data of this waveform in accordance with the address signal AD, as described above.

Tone selection information TC is weighted coefficient generation circuit 18
The function characteristics of the weighting coefficients TK1 and TK2 for the touch intensity are made to differ depending on the selected timbre type. An example of this is shown in Fig. 5, where a is the weighting coefficient of one series for the touch detection data TD.
b indicates the function of TK1, and b indicates the function of the weighting coefficient TK2 of the other series. Moreover, the solid line shows an example of these functions corresponding to a piano tone, and the broken line shows an example of these functions corresponding to a guitar tone. The slope of the function is steeper for piano tones, but
This means that the degree of timbre change depending on the key touch is large. By changing the weighting function characteristics according to the timbre, it becomes possible to more faithfully imitate the timbre change characteristics of various natural musical instrument sounds in accordance with the respective characteristics.
Note that this weighting coefficient generation circuit 18 may be configured, for example, by a memory that stores the weighting function characteristics corresponding to various tones, or may be configured by selecting the touch detection data TD as a variable. It may be configured by an arithmetic circuit that calculates a weighting function characteristic expression corresponding to a tone color, or it may be configured by a combination of a memory and an arithmetic circuit. Note that the timbre selection information TC may also be provided to the touch detection device 21, so that the characteristics of the touch detection data may be varied depending on the timbre.

The timbre selection information TC is also given to the envelope generator 25, which controls the characteristics of the envelope waveform to be generated (curves of attack, decay, sustain, dump, etc., level, time, etc.) according to the selected timbre. Touch detection data TD is also given to the envelope generator 25, which controls the maximum level of the envelope waveform according to the strength of the key touch.

FIG. 6 shows a modification of the embodiment shown in FIG. The first waveform memory 12A stores waveform data of a plurality of periods of attack and sustain parts of a waveform corresponding to a weak touch (for example, a waveform as shown in FIG. 3). Second waveform memory 13
A shows a waveform corresponding to a strong touch (for example, the second
The waveform data of the difference waveform between the waveform (as shown in the figure) and the waveform corresponding to the weak touch stored in the first waveform memory 12A is stored. Weighting circuit 15A
The multiplier 29 multiplies the waveform data of the differential waveform read from the second waveform memory 13A by the weighting coefficient TK, and the waveform data corresponding to the weak touch read from the first waveform memory 12A. and an adder 30 that adds the output of the multiplier 29 and the output of the multiplier 29. The weighting coefficient generating circuit 18A generates "1" as the weighting coefficient TK when the key touch is the strongest, generates "0" as the TK when the key touch is the weakest, and O<TK<1 according to the touch strength during that time. A weighting coefficient TK that satisfies the following conditions is generated according to a predetermined function. It is preferable that the functional characteristics of this weighting coefficient TK also vary depending on the selected timbre. 6th
In the example shown in the figure, the addition ratio of the differential waveform data to the weak touch compatible waveform read from the first waveform memory 12A is controlled according to the key touch strength, and as a result, as in the embodiment shown in FIG. Waveform data having characteristics according to the weighting circuit 15
Output from A. According to this configuration, since one waveform memory 13A is a differential waveform memory, the storage capacity of the memory can be further reduced. Incidentally, the waveform data of the attack portion and sustain portion of the waveform corresponding to the strongest touch may be stored in the first waveform memory 12A, and the adder 30 may be changed to a subtracter.

Incidentally, since the difference waveform stored in the memory 13A is the difference in amplitude value for each sample point between the strong touch corresponding waveform and the weak touch corresponding waveform, it is a spiky waveform with many harmonic components. If this thorny difference waveform is added to the weak touch compatible waveform even at a small level, there is a risk that the summed and synthesized waveform will suddenly look different from the weak touch compatible waveform read from the memory 12A. There is a possibility that the waveform will be different from the waveform of the sound played by a musical instrument. Therefore, FIG. 6 is changed as shown in FIG. 7, and a digital filter (low-pass filter) 31 is provided on the output side of the second waveform memory 13A, and the key touch is selected from the filter characteristic parameter memory 22 according to the touch detection data TD. It is preferable to read the filter characteristic parameters corresponding to the filter characteristic parameters and control the filter 31 accordingly. In this filter control, the weaker the key touch, the more rounded the differential waveform is output from the filter 31, and the stronger the key touch, the less rounded the differential waveform that is closer to the original differential waveform output from the waveform memory 13A. 31. When the touch is the strongest, the output waveform of the waveform memory 13A is outputted from the filter 31 without making any changes. Through such control, when the touch is relatively weak, the waveform corresponding to the weakest touch (output of the memory 12A)
The difference waveform added to can be made smooth with few harmonic components, and the above-mentioned disadvantages can be eliminated. Note that tone selection information is stored in the memory 32.
It is also possible to input the TC and read out the filter characteristic parameters corresponding not only to the touch of a key but also to the selected tone. Further, the digital filter 31 may be provided on the output side of the multiplier 29.

In addition, when performing timbre change control (that is, key scaling) according to the pitch or range of the musical tone to be generated, the input data of the weighting coefficient generation circuits 18, 18A (Figs. 1, 6, and 7) Instead of the touch detection data TD, input the key code KC as shown by the dotted line.Also,
A key code KC is also input to the envelope generator 25 to control the maximum level, decay time, etc. of the envelope waveform according to the pitch or range.

In addition, when performing timbre change control according to the operating state of a predetermined operator 33 (Fig. 1), the dotted line can be used instead of the touch detection data TD or key code KC as the input data of the weighting coefficient generation circuits 18, 18A. The output of the operator 33 may be input as shown in FIG.

Of course, when applying the circuits of FIG. 1, FIG. 6, or FIG. 7 to key scaling or control according to operator operation, the circuits shown in FIG. The waveforms do not correspond to strong and soft touches, but correspond to high and low pitches, or to large and small amounts of operation of the operator.

In addition, key touch, key scaling, operator 3
Tone change control may be performed by combining any plurality of the three operation states. FIG. 8 is a diagram partially showing one example, and shows the first and second waveform memories 12, 13 and weighting circuit 1 in FIG.
5. Waveform memory 1
In the 2H, waveform data of multiple periods of musical waveforms having tone characteristics corresponding to strong key touches and high pitches are stored for each tone in the same manner as described above. In the waveform memory 12L, waveform data of a plurality of cycles of musical waveforms having tone characteristics corresponding to strong key touches and low pitches are stored for each tone in the same manner as described above. In the waveform memory 13H, waveform data of a plurality of periods of musical waveforms having tone characteristics corresponding to weak key touches and high pitches are stored for each tone in the same manner as described above. In the waveform memory 13L, waveform data of a plurality of periods of musical waveforms having tone characteristics corresponding to weak key touches and low pitches are stored for each tone in the same manner as described above. These waveform memories 12H to 13L are
Similarly to the above, the tone color corresponding to the tone color type selected according to the tone color selection information TC can be read out, and is read out at an appropriate pitch frequency according to the address signal AD.

The waveform data corresponding to strong key touches read out from the waveform memories 12H and 12L are sent to multipliers 33 and 3 for weighting for key scaling.
4 respectively. Other inputs of the multipliers 33 and 34 are input with two series of key scaling coefficients KS1 and KS2 generated from the key scaling coefficient generation circuit 35 in accordance with the key code KC.
As a result, both waveform data for strong touch are weighted according to the pitch of the musical tone to be generated. The outputs of the multipliers 33 and 34 are added by an adder 36,
Thereafter, it is applied to the multiplier 16, where it is multiplied by a weighting coefficient TK1 corresponding to the key touch, similar to that described above.

Similarly to the above, the outputs of the waveform memories 13H and 13L are given to multipliers 37 and 38, and the key code
Key scaling coefficient generation circuit 39 according to KC
Key scaling coefficients KS3, KS4 generated from
and are multiplied respectively. As a result, both waveform data for soft touch are weighted according to the pitch of the musical tone to be generated. The outputs of the multipliers 37 and 38 are added by an adder 40, and then provided to a multiplier 17, where they are multiplied by a weighting coefficient TK2 corresponding to the key touch as described above.

The outputs of both multipliers 16 and 17 are added by an adder 19 and applied to a multiplier 24 (FIG. 1). In this way, the four series of waveform data having different characteristics read out from the waveform memories 12H to 13L are weighted according to both the pitch and key touch of the musical tone to be generated, and are weighted according to these timbre control factors. Waveform data to which a timbre change has been added is output from the weighting circuit 15B.

Tone selection information TC is input to the key scaling coefficient generation circuits 35 and 39, respectively. As mentioned above, the functional characteristics of the key scaling coefficients differ depending on the type of timbre (for example, as shown in Figure 5), and the key scaling coefficients KS1 to 1 that should be generated differ.
The functional characteristics of KS4 are determined according to the selected tone. Note that the key scaling coefficient generation circuit 3
5 and 39 may not be provided separately, but one may be shared.

In the example of FIG. 8, the weighting calculation for key scaling is performed and then the weighting calculation according to the key touch is performed, but this may be reversed. Furthermore, when combining the tone color change control according to the operating state of the operator and the tone color change control according to key touching or key scaling, the same configuration as shown in FIG. 8 may be used. Furthermore, it is also possible to combine all three of key touch, key scaling, and operator control, and in that case, the structure may be configured according to FIG. 8.

In the above embodiment, a case has been described in which a musical tone signal of a scale tone is generated by specifying the pitch of a musical tone to be generated using a keyboard. can also be applied. In that case, the weighting control data is based on data that simulates the strength when operating the rhythm instrument (for example, data based on the operation of the controller, data included in the rhythm pattern data, data input from an external device, etc.). All you have to do is make it happen.

Further, in the above embodiments, the case of monophonic pronunciation is explained, but it can also be implemented in the case of polyphonic pronunciation. In that case, for example, a waveform memory, a weighting circuit, etc. may be time-divisionally shared among a plurality of tone generation channels.

In the above embodiment, two series of waveform memories are provided for one timbre control factor, but the present invention is not limited to this, and three or more series may be used. In that case, three or more series of waveform data may be weighted simultaneously, or two series may be selected and weighted from among them.

Furthermore, in the above embodiment, it has been explained that the waveform memory that stores waveforms corresponding to predetermined timbre control states such as strong touch or weak touch is constituted by a separate hardware memory. It may be a commonly used memory device. For example, the waveform data of the attack section corresponding to a strong touch corresponding to a tone may be stored in the memory area of addresses A to B, and the waveform data of the attack section corresponding to a weak touch may be stored in the memory area of addresses B+1 to C. , the waveform data of the sustain section corresponding to a strong touch is stored in the memory area of addresses C+1 to D, and the waveform data of the sustain section corresponding to a weak touch is stored in the memory area of addresses D+1 to E (however, A, B, C, D, E are A<B<C
<D<E). In that case, reading of each waveform data from each memory area is controlled in a time-division manner.

In FIG. 1, a digital filter may be provided after the weighting circuit 15 to further change the timbre in accordance with timbre control factors such as key touch and key scaling.

In addition, the encoding format of the waveform data stored in the waveform memory is not limited to the PCM method mentioned above, but also the encoding format of the waveform data stored in the waveform memory.
PCM method, adaptive differential PCM method, delta modulation (DM) method, adaptive delta modulation (ADM) method, etc.
Other appropriate waveform encoding formats may also be used. In that case, it is preferable to provide a decoding circuit suitable for the encoding format at the subsequent stage of the waveform memory to return (decode) the encoding format of the waveform data read from the memory to the PCM format.

Alternatively, the weighted waveform signals of each series may not be electrically added and synthesized by an adder, but instead generated as separate series and spatially added and synthesized.

In addition, the multi-period waveform stored in the waveform memory is
It may consist not only of a plurality of continuous periods but also of a plurality of discrete periods. For example, the period from the start to the end of a musical tone is divided into multiple frames, and only one or two representative periods of waveform data is stored for each frame, and this waveform data is sequentially switched and read out repeatedly. Furthermore, if necessary, at the time of this waveform switching, the previous waveform and the next new waveform may be interpolated to form waveform data that changes smoothly.

In the above embodiment, waveform data consisting of a plurality of periods of the attack part and the sustain part is stored in the waveform memory for each series, and both the waveform signals of the attack part and the sustain part obtained based on reading of this waveform memory are stored. Although both are weighted appropriately, the waveform signal to be weighted may be either the attack portion or the sustain portion. For example, multiple series of waveform data of multi-cycle waveforms of the attack section are stored, and by reading and weighting these data, a musical tone signal of the attack section is generated with a timbre change according to a key touch, key scaling, etc. However, on the other hand, only one series of sustain section waveform data is stored, and the read-out sustain section waveform data is not weighted (therefore, no timbre change is applied to the sustain section in response to key touches, etc.). It's okay. The above is the same for the embodiments shown in FIGS. 6 and 7, and the waveform memory 13A stores waveform data representing a differential waveform only for the attack portion, and does not store waveform data for the sustain portion. You can do it like this.

Furthermore, in the case where only one sequence of waveform signals is generated for the sustain section and weighting is not performed, the device for generating the waveform signal for the sustain section may be the same as that described in the above embodiment. In addition to the waveform memory, other tone waveform generating means may be used, such as a harmonic synthesis method or a tone waveform synthesis method using frequency modulation calculations.

〔Effect of the invention〕

As described above, according to the present invention, waveform data regarding a plurality of series of waveforms having different characteristics are respectively stored in a memory, and a waveform signal obtained based on the waveform data of each series read from the memory is weighted and controlled. By weighting the data appropriately, timbre change control is performed in accordance with the weighting, so it is possible to obtain high-quality musical tone signals, and the timbre of this high-quality musical tone signal can be changed to various tones. Subtle control can be performed depending on control factors, and this timbre change control can be realized by a reduced waveform memory configuration. In particular, according to the present invention, the function of the weighting control data exhibits unique characteristics depending on the selected or designated timbre type, so the timbre change characteristics realized thereby also differ depending on the timbre type. Become. Therefore, it becomes possible to more faithfully imitate, for example, the timbre change characteristics of various natural musical instrument sounds in response to key touches, key scaling, etc., in accordance with the unique characteristics of each.

According to the second feature of the invention, only one of the two series of waveform data is stored in the memory, and the waveform data of the difference waveform of both series is stored in the memory, and the waveform of the difference waveform read from the memory. Since the musical tone signal is obtained by appropriately weighting the waveform signal obtained based on the data and combining it with the waveform signal obtained based on one series of waveform data read from the memory, in addition to the above-mentioned effects, Furthermore, compared to the case where two series of waveform data are stored as they are, memory capacity can be saved by storing the difference waveform.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall configuration of an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing an example of the musical sound waveform of an actual piano sound played with a strong touch, and FIG. A waveform diagram showing an example of the musical waveform of an actual piano sound played with a weak touch, FIG. 4 is a diagram showing an example of the amplitude envelope waveform, and FIG. 5 is a graph showing an example of the weighting coefficient function.
FIG. 6 is a block diagram showing a modification of the waveform memory and weighting circuit in FIG. 1, FIG. 7 is a block diagram showing a modification of FIG. 6, and FIG. 8 is a block diagram showing a modification of the waveform memory and weighting circuit in FIG. 2 is a block diagram showing an example of a modification of the waveform memory and weighting circuit of FIG. 1 in the case of adding timbre change; FIG. 10...Keyboard circuit, 11...Address signal generation circuit, 12, 12A, 12H, 12L, 13, 1
3A, 13H, 13L... Waveform memory, 15, 1
5A, 15B...Weighting circuit, 18, 18A...
... Weighting coefficient generation circuit, 21 ... Touch detection device, 33 ... Operator, 35, 39 ... Key scaling coefficient generation circuit.

Claims (1)

[Scope of Claims] 1. A timbre selection means for selecting or specifying the timbre of a musical sound to be generated; and a timbre control information generating means for generating timbre control information according to a timbre control factor for controlling the timbre of a musical sound. and storing waveform data regarding first and second series of waveforms exhibiting different characteristics in correspondence with each timbre that can be selected or designated by the timbre selection means, and the timbre selected or designated by the timbre selection means. waveform storage means from which the first and second series of waveform data corresponding to the timbre can be read out; reading means for reading out the first and second series of waveform data from the waveform storage means, respectively; and the timbre. The output of the selection means and the timbre control information are input, and weighting control data corresponding to the first and second series are respectively generated in accordance with the input, and this weighting control data is used for the timbre. It changes according to the value of the control information, and this change characteristic is determined according to a unique interpolation function corresponding to the selected or specified timbre, and the first series and the second series have different timbres in opposite directions. weighting control data generation means that indicates a change characteristic; and weighting control data generation means for generating waveform signals of the first and second series obtained based on the waveform data read from the waveform storage means, each of which corresponds to the series. A musical tone signal generating device comprising: weighting means for weighting according to weighting control data; 2. Claims in which the timbre control information generating means generates timbre control information in accordance with the intensity of a touch applied to a key pressed on a keyboard for specifying the pitch of a musical tone to be generated. 2. The musical tone signal generating device according to item 1. 3. The musical tone signal generating device according to claim 1, wherein the tone control information generating means generates tone control information that indicates different values depending on the pitch or range of the musical tone to be generated. 4. The musical tone signal generating device according to claim 1, wherein the tone control information generating means generates tone control information indicating different values depending on the operation state of a predetermined tone control operator. 5 Generates a musical tone signal of rhythm sound,
2. The musical tone signal generating device according to claim 1, wherein the tone color control information indicates different values depending on data simulating the intensity when operating a rhythm instrument. 6. A timbre selection means for selecting or specifying the timbre of a musical tone to be generated, and a timbre control information generation means for generating timbre control information in accordance with a timbre control factor for controlling the timbre of a musical tone, having different characteristics. The waveform data of multiple cycles regarding the waveform of one series of the two series of waveforms is first
and storing waveform data of a plurality of cycles as second waveform data regarding a difference waveform corresponding to the difference between the waveforms of both series,
The first and second waveform data are respectively stored corresponding to each timbre that can be selected or specified by the timbre selection means, and the first and second waveform data correspond to the selected or specified timbre. waveform storage means capable of outputting; reading means for reading out the first and second waveform data from the waveform storage means; inputting the output of the timbre selection means and the timbre control information; The weighting control data is generated according to the value of the timbre control information, and the function of this change is determined according to the selected or specified timbre. weighting control data generating means, which weights a waveform signal obtained based on the second waveform data read out from the waveform storage means according to the weighting control data, and then generates the first waveform. A musical tone signal generation device comprising a weighted synthesis means for synthesizing a waveform signal obtained based on data and outputting the resultant signal as a musical tone signal. 7. The musical tone signal generation according to claim 6, wherein the weighting and synthesizing means includes means for suppressing harmonic components of a waveform signal that is weighted or weighted according to the weighting control data. Device.