JPS61112193A - Musical sound generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to a musical tone generating device, and more specifically to a so-called waveform memory that generates musical tones by reading musical waveforms stored in a waveform memory. This invention relates to a read-out type musical tone generating device.

(Prior art) As a conventional musical tone generator using a waveform memory reading/reading method,
For example, there is an invention disclosed in Japanese Patent Publication No. 50-33842. In other words, the pitch of the musical tone to be generated (the pitch of the pressed key) in the waveform memory that stores the desired musical sound waveform (sound source waveform)
A musical tone is generated by using the read address signal corresponding to the musical tone signal and using the musical sound waveform thus read out as a musical tone signal.

(Problem to be solved by the invention) By the way, as is well known, the sound of a natural instrument depends on its pitch (
The tones differ slightly depending on the pitch (or range). However, in the conventional musical tone generation device using the waveform memory read method described above, once the shape of the musical waveform to be stored in the waveform memory is determined, the generated musical tone (musical tone signal) is fixed to a tone corresponding to this set waveform. Since the timbre cannot be easily changed, it is difficult to generate musical tones with different timbres for each pitch (range) as with natural musical instruments. In order to generate musical tones with different timbres for each pitch (range), it is necessary to provide a waveform memory that stores different musical waveforms for each pitch (range), which would result in a huge system. I don't get it.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to easily generate musical tones with different tones for each pitch (or range) in a musical tone generating device using a waveform memory reading method.

(Means for Solving the Problems and Their Effects) The present invention includes a pitch specifying means for specifying the pitch of a musical tone to be generated, and a pitch that changes sequentially in response to the pitch specified by the pitch specifying means. address signal generation means for generating an address signal that generates a first address signal; and a parameter signal generation means for generating a parameter signal corresponding to the pitch specified by the pitch specifying means or the range to which the pitch belongs. means for calculating the first address signal and the parameter signal to output at least one second address signal; and at least two waveforms relating to the first and second waveforms that are different from each other. A waveform storage means for storing signals and read out by the first and second address signals, and a combining means for combining each waveform signal read from the waveform storage means are provided.

Since the first address signal and the second address signal have a predetermined phase difference corresponding to the parameter signal, each waveform signal output from the waveform storage means also has a predetermined phase difference. In this case, as the parameter signal changes in accordance with the pitch or range of the musical sound to be generated, the phase difference between the waveform signals described above also changes in accordance with the pitch or range of the musical sound. Therefore, the musical tone signal formed by synthesizing each of these waveform signals changes its waveform shape (timbre) in accordance with the change in the phase difference described above, and as a result, the musical tone (musical tone signal) that is generated changes. ) changes in accordance with the pitch or timbre of the musical note.

(Embodiment) An embodiment of the present invention is shown in FIG. 1. FIG. 1 shows an embodiment in which a musical tone generator according to the present invention is applied to an electronic musical instrument, and shows a keyboard circuit as a pitch specifying means. Each of the output lines of 1 is connected to the input side of the frequency information memory 2 on one side, and to the input side of the note scaling parameter memory 3 on the other side. Further, the keyboard circuit 1 is configured to output a key-on signal KON indicating that a certain key has been pressed.
The output terminal K of the zero frequency information memory 2 is connected to the input side of the envelope waveform generator 9, and the output side of the zero frequency information memory 2 is connected to the input side of the accumulator 4, and the accumulation command terminal of the accumulator 4 is connected to the input side of the accumulator 4. A clock pulse φ is input to. here,
Frequency information memory 2 and accumulator 4 constitute address signal generation means. The output side of the accumulator 4 is connected to the address input side of a waveform memory 6, which is a waveform storage means, and is also connected to the first input terminal A of the adder 5.

The output side of the note scaling parameter memory 3, which is a parameter signal generating means, is connected to the second input terminal B of the adder 5.
The output side of the adder 5 is also connected to the address input side of a waveform memory 7 which is a waveform storage means.

The outputs of the waveform memories 6 and 7 are connected to a first input terminal A and a second input terminal B of an adder 8, respectively.

Here, the adder 5 constitutes an arithmetic means, and the adder 8 constitutes a synthesis means, respectively.

The output side of the adder 8 is connected to the first input terminal A of the multiplier 10, and the output side of the envelope waveform generator 9 is connected to the second input terminal B of the multiplier 10. The output side of the D/A converter 10 is connected to the input side of a digital analog converter (hereinafter abbreviated as rD/A converter) 11, and the output side of the D/A converter 13 is connected to a sound system 12 consisting of an amplifier, speakers, etc. connected to the input side of the

Here, when a key on the keyboard of the electronic musical instrument is pressed, the m-board circuit l outputs a key-on signal KON, and also outputs a key-on signal KON.
It is configured to output a logical value "t" to one output line corresponding to the pressed key.

Further, the frequency information memory 2 stores frequency information F (constant) having values corresponding to pitches of six keys, respectively. In the note scaling parameter memory 3, for example, the second
Note scaling parameter signals NSP having values corresponding to pitches of six keys as shown in the figure are stored. Furthermore,
The waveform memory 6 stores a waveform signal related to the waveform Wl as shown in FIG. 3(A), for example, and the waveform memory 7 stores a waveform signal related to the waveform W2 as shown in FIG. 3(B), for example. There is. In addition, the envelope waveform generator 9
is configured to output a predetermined envelope waveform signal EV in response to a key-on signal KON indicating that a certain key has been pressed.

The operation of the electronic musical instrument having the above configuration will now be described.

When a certain key is pressed on the keyboard section, a key-on signal KON is output from the w1 keyboard circuit 1, and a logical value "t" is output to one output line corresponding to the pressed key of the keyboard circuit l. . Therefore, frequency information F having a value corresponding to the pitch of the pressed key (the pitch of the musical sound to be generated) is read from the frequency information memory 2, and furthermore, the frequency information F having a value corresponding to the pitch of the pressed key (the pitch of the musical sound to be generated) is read out from the note scaling parameter memory 3. Frequency information F read out from the frequency information memory 2 from which the note scaling parameter signal NSP corresponding to the pitch of the note is read out
are sequentially accumulated in the accumulator 4 at the timing of the clock pulse φ, and the accumulated value qF (q=1, ?, 3,)...
is input as a first address signal to the address input side of the waveform memory 6 and to the first input terminal A of the adder 5, respectively. Here, the accumulator 4 is configured to repeatedly accumulate the frequency information F from the beginning when the accumulated value qF reaches its maximum accumulated value (modulo).

Further, the note scaling parameter signal NSP read from the note scaling parameter memory 3 is input to the second input terminal B of the adder 5. Therefore, the adder 5 adds the accumulated value qF (first address signal) outputted from the accumulator 4 and the note scaling parameter signal NSP, and uses the added value (qF+N5P) as the second address signal in the waveform. Output to memory 7.

As is clear from the above explanation, the second address signal (qF+N5P) input to the waveform memory 7 has a higher note scaling parameter signal than the first address signal (qF) input to the waveform memory 6. The phase is advanced by the value of NSP. Therefore, as shown in FIG. 4, the waveform signal Wl output from the waveform memory 6 and the waveform signal W2 output from the waveform memory 7 have a predetermined phase difference P determined by the note scaling parameter signal NSP. have. These two waveform signals W
l and W2 are added in an adder 8, and a musical tone signal (W
1+W2) is formed. Thereafter, this musical tone signal is input to the first input terminal A of the multiplier IO, where it is mutually connected with the envelope waveform signal EV output from the envelope waveform generator 9 in response to the key-on signal KON output from the keyboard circuit 1. After being multiplied and given an appropriate volume envelope, the musical tone signal is converted from a digital signal to an analog signal by the D/A converter 11, and then produced by the sound system 12 as a musical tone.

According to this embodiment, two waveform signals W1 . W2 is the first one whose phase differs by the value of the note scaling parameter signal NSP,
Since they are read using the second address signal, two waveform signals W1 and W2 whose phases differ by an amount corresponding to the value of the note scaling parameter signal NSP are output from the waveform memories 6 and 7, as shown in FIG. Read out. As mentioned above, since the six values of the note scaling parameter signal NSP stored in the note scaling parameter memory 3 correspond to each pitch, the phase difference P between the waveform signals Wt and W2 also corresponds to the pitch. value. According to the example shown in FIG. 2, the note scaling parameter signal NS
The value of P is large at low pitches and small at high pitches. Therefore, in this case, the phase difference P between the waveform signals Wl and W2 takes a large value at low pitches and a small value at high pitches.

In this way, two waveform signals W1 and W2 having a predetermined phase difference corresponding to the pitch of the pressed key (the pitch of the musical tone to be generated) are generated.
are added to each other to form a musical tone signal, so that a musical tone signal whose waveform changes depending on the pitch of the pressed key is formed. Therefore, according to this embodiment, it is possible to easily generate musical tones whose timbre changes depending on the pitch.

In the above explanation, the case where two waveforms are stored in the waveform memory and a musical tone signal is formed by synthesizing these waveform signals is explained, but the present invention is not limited to this, and the present invention is not limited to this. The number of stored waveforms may be further increased.

Further, the second address signal is formed by adding the first address signal (accumulated value qF) and the note scaling parameter signal NSP, but the present invention is not limited to this. The second address signal may be formed by subtracting the note scaling parameter signal NSP from Although an example has been described, instead of this, for example, note scaling parameter signals NSP having different values for each range may be stored.

(Effects of the Invention) According to the present invention, a musical tone signal is formed by synthesizing a plurality of waveform signals having a predetermined phase difference corresponding to the pitch or range of a musical tone to be generated. Since it is possible to generate musical tone signals whose timbre changes depending on the pitch range, it is possible to generate musical tones with different timbres for each pitch or range, like a natural musical instrument.

[Brief explanation of drawings]

FIG. 1 is a blow line diagram showing one embodiment of the present invention, and FIG. 2 is a waveform diagram showing an example of a note scaling parameter signal stored in the note scaling parameter memory in the embodiment shown in FIG. , Figure 3(A),
CB) are waveform diagrams showing examples of waveforms stored in the waveform memory in the embodiment shown in the first embodiment, and FIG. 4 is a waveform signal output from the two waveform memories in the embodiment shown in FIG. FIG. l...Keyboard circuit 2...Frequency information memory 3...Note scaling parameter memory 4...
・Accumulator 5...Adder 6.7...Waveform memory 8...Adder Patent applicant Nippon Gakki Manufacturing Co., Ltd. Patent application agent Patent attorney Sugawara Part 2 Figure 3 (A) (B) Fig. 4 ←−−→ −Ra Katakami l P . Tewa υ 硼 4j official book September 27, 1985! , Indication of the case Japanese Patent Application No. 1988-194274 2, Name of the invention Musical tone generator 3, Person making the amendment Relationship to the case Patent applicant address 10-1 Nakazawa-cho, Hamamatsu City, Shizuoka Prefecture Name (407) Nippon Gakki Manufacturing Co., Ltd. Company postal code 145
Yuki 723-45935, Specification subject to amendment (full text) 6. Statement of contents of amendment All 1 (full text)...As shown in the attached sheet. Description (full text amendment) 1. Name of the invention Musical sound generating device 2. Claims Pitch designation means for designating the pitch of the musical sound to be generated; Corresponds to the pitch designated by the pitch designation means above. and a parameter signal generator that generates a parameter signal corresponding to the pitch specified by the pitch specifying means or the range to which the pitch belongs. means for calculating the first address signal and the parameter signal and outputting at least one second address signal; and at least two waveforms relating to the first and second waveforms that are different from each other. waveform storage means for storing signals and read out by the first and second address signals; a synthesizer for synthesizing each waveform signal read from the waveform storage means, and generating a musical tone based on the output of the synthesizer. 3. Detailed Description of the Invention (Field of Industrial Application) This invention relates to a musical tone generation device, and more specifically to a so-called waveform memory readout device that generates musical tones by reading musical waveforms stored in a waveform memory in advance. The present invention relates to a musical tone generating device of this type. (Prior art) As a conventional musical tone generator using a waveform memory read method,
For example, there is an invention disclosed in Japanese Patent Publication No. 50-33842. In other words, the pitch of the musical tone to be generated (the pitch of the pressed key) in the waveform memory that stores the desired musical sound waveform (sound source waveform)
A musical tone is generated using the readout address signal corresponding to the musical tone signal as a musical tone signal. (Problem to be solved by the invention) By the way, as is well known, the sound of a natural instrument depends on its pitch (
The tones differ slightly depending on the pitch (or range). However, in the conventional musical tone generation device using the waveform memory read method described above, once the shape of the musical waveform to be stored in the waveform memory is determined, the generated musical tone (musical tone signal) is fixed to a tone corresponding to this set waveform. Since the timbre cannot be easily changed, it is difficult to generate musical tones with different timbres for each pitch (range) as with natural musical instruments. In order to generate musical tones with different timbres for each pitch (range), it is necessary to provide a waveform memory that stores different musical sound waveforms for each pitch (range), which would result in a huge system. I don't get it. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a waveform memory read type musical tone generation device that can easily generate musical tones with different tones for each pitch (or range). (Means for Solving the Problems and Their Effects) The present invention includes a pitch specifying means for specifying the pitch of a musical tone to be generated, and a pitch that changes sequentially in response to the pitch specified by the pitch specifying means. an address signal generating means for generating a first address signal for the first address signal; a parameter signal generating means for generating a parameter signal corresponding to the pitch specified by the pitch specifying means or a range to which the pitch belongs; the first address signal and the parameter signal to generate at least one second address signal;
an arithmetic means for outputting an address signal of a
A waveform storage means for outputting the waveform and a synthesis means for synthesizing each waveform signal read from the waveform storage means are provided. Since the first address signal and the second address signal have a predetermined phase difference corresponding to the parameter signal φ, each waveform signal output from the waveform storage means also has a predetermined phase difference
Become something. In this case, as the parameter signal changes in accordance with the pitch or range of the musical tone to be generated, the phase difference between the waveform signals described above also changes in accordance with the pitch or range of the musical tone. Therefore, the musical tone signal formed by synthesizing each of these waveform signals changes its waveform shape (timbre) in accordance with the change in the phase difference described above, and as a result, the musical tone (musical tone signal) that is generated changes. ) changes in accordance with the pitch or range of the musical note. (Embodiment) An embodiment of the present invention is shown in FIG. 1. FIG. 1 shows an embodiment in which a musical tone generator according to the present invention is applied to an electronic musical instrument, and shows a keyboard circuit as a pitch specifying means. Each output line of 1 is connected to the input side of the frequency information memory 2 on one side, and the input side of the note scaling parameter memory 3 on the other side. Further, the keyboard circuit l is configured to output a key-on signal KON indicating that a certain key has been pressed, and its output terminal K is connected to the input side of the envelope waveform generator 9. The output side of 2 is accumulator 4
The accumulator 4 is connected to the input side of the accumulator 4, and a clock pulse φ is input to the accumulation command terminal of the accumulator 4. Here, the one-frequency information memory 2 and the accumulator 4 constitute address signal generation means. The output side of the accumulator 4 is connected to the 7dress input side of a waveform memory 6 which is a waveform storage means, and
It is connected to the first input terminal A of the adder 5. The output side of the note scaling parameter memory 3, which is a parameter signal generating means, is connected to the second input terminal B of the adder 5.
The output side of the adder 5 is also connected to the address input side of a waveform memory 7 which is a waveform storage means. The outputs of the waveform memories 6 and 7 are connected to a first input terminal A and a second input terminal B of an adder 8, respectively. Here, the adder 5 constitutes an arithmetic means, and the adder 8 constitutes a synthesis means, respectively. The output side of the adder 8 is connected to the first input terminal A of the multiplier lO, and the output side of the envelope waveform generator 9 is connected to the second input terminal B of the multiplier lO. The output side of IO is connected to the input side of a digital-to-analog converter (hereinafter abbreviated as rD/A converter) 11! The output side of the D/A converter 11 is connected to the input side of a sound system 12 consisting of an amplifier, speakers, and the like. Here, l! The board circuit l is configured to output a key-on signal KON when a key, which is the 1191 part of the electronic musical instrument, is pressed, and output a logical value "l" to one output line corresponding to the pressed key. ing. Further, the frequency information memory 2 stores frequency information F (constant) of values corresponding to the pitches of the six keys, respectively.
Note scaling parameter signals NSP having values corresponding to pitches of six keys as shown in the figure are stored. Furthermore,
The waveform memory 6 stores, for example, a waveform signal related to the waveform W1 as shown in FIG. 3(^), and the waveform memory 7 stores a waveform signal related to the waveform W2 as shown in FIG. 3(CB), for example. . In addition, the envelope waveform generator 9
is configured to output a predetermined envelope waveform signal EV in response to a key-on signal KON indicating that a certain key has been pressed. The operation of the electronic musical instrument having the above configuration will now be described. When a certain key is pressed in the m111 section, 1lII
! A key-on signal KON is output from the circuit l, and a logic value "1" is output to one output line corresponding to the pressed key of the keyboard circuit l. Therefore, frequency information F having a value corresponding to the pitch of the pressed key (the pitch of the musical sound to be generated) is read from the frequency information memory 2, and furthermore, the frequency information F of the value corresponding to the pitch of the pressed key (the pitch of the musical sound to be generated) is read out from the note scaling parameter memory 3. Note scaling parameter signal NS corresponding to pitch)
Frequency information F read out from the frequency information memory 2 is sequentially accumulated in the accumulator 4 at the timing of the clock pulse φ, and the accumulated value qF (q=1.2
．． 3. )... are input as first address signals to the address input side of the waveform memory 6 and the first input terminal A of the adder 5, respectively. Here, when the accumulated value qF reaches its maximum accumulated value (modulo), the accumulator 4 outputs the frequency information F.
It is configured to repeat the accumulation from the beginning again. Further, the note scaling parameter signal NSP read from the note scaling parameter memory 3 is input to the second input terminal B of the adder 5. Therefore, the adder 5 adds the accumulated value qF (first address signal) outputted from the accumulator 4 and the note scaling parameter signal NSP, and uses the added value (qF+N5P) as the second address signal in the waveform. Output to memory 7. As is clear from the above explanation, the second address signal (qF4-NSP) input to the waveform memory 7 has a note scaling parameter in comparison with the first address signal (qF) input to the waveform memory 6. The phase is advanced by the value of the signal NSF. Therefore, as shown in FIG. 4, the waveform signal Wl output from the waveform memory 6 and the waveform signal W2 output from the waveform memory 7 have a predetermined phase difference P determined by the note scaling parameter signal NSP. have. These two waveform signals W
l and W2 are added in an adder 8, and a musical tone signal (W
t+W2) is formed. Thereafter, this musical tone signal is inputted to the first input terminal A of the multiplier 10, where it is mutually connected with the envelope waveform signal EV outputted from the envelope waveform generator 9 in response to the key-on signal KON outputted from the keyboard circuit l. After being multiplied and given an appropriate volume envelope, the musical tone signal is converted from a digital signal to an analog signal by the D/A converter 11, and then produced by the sound system 12 as a musical tone. According to this embodiment, two waveform signals W1 . W2 is set to the first .
Since they are read using the second address signal, two waveform signals W1 and W2 whose phases differ by an amount corresponding to the value of the note scaling parameter signal NSP are output from the waveform memories 6 and 7, as shown in FIG. Read out. As mentioned above, since the six values of the note scaling parameter signal NSP stored in the note scaling parameter memory 3 correspond to each pitch, the phase difference P between the waveform signals W1 and W2 also corresponds to the pitch. value. According to the example shown in FIG. 2, the note scaling parameter signal NS
The value of F is large at low pitches and small at high pitches. Therefore, in this case, the phase difference P between the waveform signals Wl and W2 takes a large value at low pitches and a small value at high pitches. In this way, two waveform signals Wl and W2 having a predetermined phase difference corresponding to the pitch of the pressed key (the pitch of the musical tone to be generated) are generated.
are added to each other to form a musical tone signal, so that a musical tone signal whose waveform changes depending on the pitch of the pressed key is formed. Therefore, according to this embodiment, it is possible to easily generate musical tones whose timbre changes depending on the pitch. In the above explanation, the case where two waveforms are stored in the waveform memory and these waveform signals are synthesized to form a musical tone signal has been explained, but the present invention is not limited to this, and the present invention is not limited to this. The number of stored waveforms may be further increased. Further, the second address signal is formed by adding the first address signal (accumulated value qF) and the note scaling parameter signal NSP, but the present invention is not limited to this. The second address signal may be formed by subtracting the note scaling parameter signal NSP from Although an example has been described, instead of this, for example, a note scaling parameter signal NSP having a different value for each tone range may be stored. (Effects of the Invention) According to the present invention, a musical tone signal is formed by synthesizing a plurality of waveform signals having a predetermined phase difference corresponding to the pitch or range of a musical tone to be generated. Since it is possible to form musical tone signals whose timbre changes according to the pitch or range, it is possible to generate musical tones with different timbres for each pitch or range, just like a natural musical instrument4. Block diagram showing one embodiment of this invention, second
The figures are waveform diagrams showing an example of the /-t scaling parameter signal stored in the note scaling parameter memory in the embodiment shown in Fig. 1, and Figs. 3 (A) and C.
B) is a waveform diagram showing examples of waveforms stored in the waveform memory in the embodiment shown in FIG. 1, and FIG. 4 is a waveform diagram output from two waveform memories in the embodiment shown in FIG. FIG. 3 is a waveform diagram showing an example of a signal.

Claims (1)

[Claims] Pitch specifying means for specifying the pitch of a musical tone to be generated; and an address for generating a first address signal that sequentially changes in response to the pitch specified by the pitch specifying means. a signal generating means; a parameter signal generating means for generating a parameter signal corresponding to the pitch specified by the pitch specifying means or the range to which the pitch belongs; and the first address signal and the parameter signal. arithmetic means for calculating and outputting at least one second address signal; and storing waveform signals relating to at least two first and second waveforms different from each other; a musical tone generating device, comprising a waveform storage means read out by the waveform storage means, and a synthesis means for synthesizing each waveform signal read from the waveform storage means, and generating musical tones based on the output of the synthesis means. .