JPH05241579A - Musical sound synthesizing device - Google Patents

Abstract

PURPOSE:To synthesizer a musical sound which does not deviate in the timing of performance even when the timbre of the performance sound is varied as to the musical sound synthesizing device of an electronic musical instrument which outputs a musical sound according to performance information. CONSTITUTION:Among the performance information which is inputted to a delay control part in a sound source part 13, only delay data outputted from a memory 14 corresponding to timbre data are outputted, and performance data other than sounding-ON data is delayed by predetermined time length and outputted, so the timing of the sounding-ON data corresponding to the rising time of a different musical sound for each kind of timbre is adjusted relatively to other performance information to prevent the sounding timing from deviating according to the timbre.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical sound synthesizer, which is called a sound source or a sound source module, among electronic musical instruments, for outputting a musical sound based on performance information.

[0002]

2. Description of the Related Art In recent years, a so-called sound generation channel of an electronic musical instrument has been introduced with a synthesizing method by digital technology, and the quality of synthesized sound has been remarkably improved. Using such a tone generation channel, a musical tone is synthesized and output with performance information formed from data such as tone color, pitch, volume, sounding on, and sounding off output from a performance information recording / playback device called a sequencer. Or a tone synthesizer such as a tone generator of an electronic musical instrument with a sequencer function. Such a technique is disclosed, for example, in Japanese Patent Laid-Open No. 52-1.
It is described in detail in Japanese Patent No. 21313.

The above-mentioned musical tone synthesizer will be described below with reference to the drawings. FIG. 5 shows the configuration of a conventional tone synthesizer. In FIG. 5, 10 is a sound generation control unit, 11 is a sound source unit, and 12 is a sound system.

FIG. 6 shows the structure of the sound source unit 11. In FIG. 6, 301 to 303 are sound generation channels, and 323 is an adder.

The operation of the musical tone synthesizing apparatus having the above configuration will be described below.

The tone generation control section 10 responds to each tone generation channel 301 to 303 of the tone generator section 11 according to the performance information consisting of tone color data, pitch data, volume data, tone generation on data, and tone generation off data which are input. , Tone generation channel data, tone color data, pitch data, volume data, tone on data, tone off data. Each of the sound generation channels 301 to 303 synthesizes a musical instrument sound of a tone color indicated by the tone color data, and when the tone-on data is input, synthesis of a musical tone having a pitch corresponding to the input pitch data is started. Then, the synthesized musical tone is output. The musical tones output from the respective sound generation channels 301 to 303 are added by an adder 323 and output to a sound system 12 including a digital / analog converter (hereinafter referred to as a DA converter), an amplifier, a speaker and the like as a musical sound. It will be emitted. Note that, when tone generation off data is input to each of the tone generation channels 301 to 303, the tone output thereof is gradually attenuated and the tone generation is terminated. Here, the tone color data usually corresponds to the type of musical instrument, but it is also assumed that even one musical instrument has different tone colors depending on the pitch or the strength of the musical tone.

The sound generation control unit 10 is usually called a channel assigner, and has three sound generation channels 301 to 301.
In order to sequentially assign the performance information input to 303, the sound generation channel data specifying the sound generation channel is output. When the sound generation channel identification numbers of the sound generation channels 301 to 303 are 1, 2, and 3, respectively, the sound generation control unit 10 changes the input sound information from the first sound to the second and third sounds instructed in order. On the other hand, the tone generation channel data 1, 2 and 3 are outputted, and the tone generation channels having the tone generation channel data and the tone generation channel identification number correspond to each other one to one. When the fourth sound is input, the pronunciation control unit 1
0 cyclically repeats the operation of outputting the tone generation channel data 1 to output the fourth tone to the tone generation channel 301, outputting the tone generation off data, and then allocating the fourth tone to the tone generation channel 301.

Various methods have been proposed for allocating the performance information to the sounding channels by the sounding control unit 10. As described above, in addition to the method of simply allocating the sounding channels to the sounding channels in order, the sounding states of the sounding channels are changed. A method of allocating after detecting an available sounding channel while monitoring, or assigning a new sound to the currently sounding sounding channel after instructing a rapid sound stop called so-called first dump and then assigning a new sound There is a method to prevent the pronunciation of.

The structure of the tone generation channel used as described above will be described with reference to FIG.

In FIG. 7, 200 is a comparator, 201,
Reference numerals 202 and 203 are address generators, 211 is a dump memory, 212 is an envelope memory, 213 is a waveform memory, 221 to 223 are multipliers, and 230 to 234 are gates.

The tone generation channel data output from the tone generation control section 10 is compared with the tone generation channel identification number in the comparator 200, and the comparator 200 outputs the value "0" when the two values match, indicating that they do not match. Sometimes the value "1" is output. Since the gates 230 to 234 pass the performance information input from the sound generation control unit 10 only when the output value of the comparator 200 is “0”, the performance information input to the address generators 201 to 203 is transmitted to the sound generation control unit. It is the performance information that has passed through the gate in the tone generation channel specified by the tone generation channel data output from 10.

The address generators 201 to 203 receive an address initial value, an address increment value, and a count start signal, respectively, and start operation by the count start signal. The result of cumulative addition of the address increment value as shown in FIG.
(Accumulated value shown in (b)) and address initial value (FIG. 8C)
(See FIG. 8D) is output.

The address generator 203 starts its operation by using the input tone-on data as a count start signal. The address increment value input as the pitch data is cumulatively added for each sampling period, and the cumulative addition is repeated even after the predetermined address length, for example, the integer part of 9 bits of the cumulative value overflows.

The input timbre data is combined as a 9-bit upper address of the integral part of the above-mentioned accumulated value as an address initial value and then output as an address to the waveform memory 213. When the number of timbres is eight, at least 3 bits are required as the initial address value.

When the waveform data stored in the waveform memory 213 is 512 pieces of waveform data as shown in FIG. 9C, the addresses required for sequentially reading the waveform data are 9 bits of 0 to 511. Which corresponds to 9 bits of the integer part of the accumulated value.

The pitch indicated by the pitch data is 62.
At 5 Hz, the waveform shown in FIG.
When outputting 2), the sampling frequency is 32k.
In the case of Hz, a value of 1.0 is given to the pitch data in order to read out 512 pieces of waveform data in one cycle. At a pitch of 130 Hz one octave higher, the pitch data value is 2.0.
When the pitch data value is 1.5, 93.75 Hz
Will be synthesized. The address generator 203 keeps counting up the address value, so that the waveform shown in FIG. 9C is repeatedly output from the waveform memory 213.

Since the pitch data usually includes a fractional part, the cumulative addition is carried out by a fixed point arithmetic including about 10 bits of the fractional part.

The address generator 202 starts its operation by using the input tone-on data as a count start signal,
By the same operation as the address generator 203, the integral memory 9 bits of the accumulated value obtained by cumulatively adding the address increment value for each sampling period to the envelope memory 212 and the input tone color data are described as the address initial value. The address formed by the combination of the integer part of the accumulated value and the upper 9-bit address is output. When the number of timbres is eight, at least 3 bits are required as the initial address value.

According to the address output from the address generator 202, the envelope data stored in the envelope memory 212, for example, as shown in FIG. 9B is output. The address generator 202
When the accumulated value exceeds 511, the cumulative addition is stopped. Since the change of the envelope is very gradual with respect to the change of the waveform, a decimal value of 0.01 or less is often given as the normal address increment value.

The address generator 201 continues to output the address value "0", but when the tone generation off data is input, it starts operating as a count start signal, and by the same operation as the address generator 203, the address increment value is increased. 1.
Since 6 bits of the integer part of the accumulated value obtained by cumulatively adding 0 for each sampling cycle are output to the dump memory 211 as an address, dump data as shown in FIG. 9A is output from the dump memory 211. Here, if the sampling frequency is 32 kHz and the address increment value is 1, the dump data of 64 points is output and attenuated in 2 milliseconds. When the cumulative addition result in the integral part 6 bits of the accumulated value overflows, the address generator 201 ends the operation and outputs the address value “0”.

Waveform memory 213 and envelope memory 2
12 and the dump memory 211 respectively output the waveform data, the envelope data, and the dump data after being multiplied by the multiplier 221 and the multiplier 222,
Since the multiplier 223 multiplies and outputs the sound volume data, musical tones are output from the tone generation channels 201 to 203.

As described above, musical tones are output from the respective sounding channels in accordance with the performance information. For example, cymbals (see FIG. 10 (a)) and wood bass (see FIG. 10 (b)). As shown in FIG. 1, when the musical tone is played at the same timing, the musical tone has a different rise time, and therefore the musical tone feels different at the same time.
When it is desired to generate a musical tone at the timing shown in FIG. 1 (a), even if the tone-on data is given at the timing shown in FIG. 11 (b), a wood bass tone with a delayed timing is produced as shown in FIG. 11 (c). For this reason, as shown in FIG.
As in (e), it gave a wood bass sound with timing.

[0023]

However, in the above configuration, if only the tone color data is changed while the performance information remains unchanged, the timing may not match depending on the selected tone color data. That is, as the most extreme example, when the timbre of the cymbal is selected in accordance with the tone-on data for wood bass, there is a problem that the timings do not match as shown in FIG. 11 (f).

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a musical tone synthesizing device in which the timing is not shifted even if the tone color selected by the performance information is changed.

[0025]

In order to achieve this object, the tone synthesizer of the present invention generates a tone based on performance information including at least tone color data, pitch data, sounding on data, and sounding off data. The pronunciation channel to output,
A memory for reading and outputting the delay data according to the tone color data, a time delay corresponding to the delay data for the sounding on data, and a predetermined time delay for performance information other than the sounding on data. And a delay control unit for outputting to a sound generation channel.

[0026]

With this configuration, the delay control section delays the tone-on data by a time length different from that of the other performance information in accordance with the delay data corresponding to the tone color data output from the memory. The deviation of the rising timing of the musical tone is corrected and controlled by the delay data corresponding to the timbre.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a musical sound synthesizing apparatus according to an embodiment of the present invention. In FIG. 1, 13 is a sound source section,
14 is a memory. The sound generation control unit 10 and the sound system 12 have the same configurations as those of the conventional example.

The operation of the musical tone synthesizing apparatus configured as described above will be described below.

When performance information is input, the pronunciation control unit 10
Outputs tone generation channel data, tone color data, pitch data, volume data, tone on data, tone off data in the same manner as in the conventional example.

The memory 14 stores the sound control section 10 from the 8-word delay data stored in advance corresponding to the tone color.
The delay data Ti corresponding to the tone color data (3 bits) output from is read out and output.

The sound source unit 13 is constructed as shown in FIG.
In FIG. 2, 21 to 23 are delay control units, 31 to 33 are sound generation channels, and 34 is an adder. Further, FIG. 3 shows the configuration of the delay control units 21 to 23. In FIG. 3, 41
˜45 are delay sections, and 51˜56 are gates. The comparator 200 has the same structure as the conventional example.

The comparator 200 operates in the same manner as in the conventional example to select any one delay control section from the delay control sections 21 to 23 according to the value of the sound generation channel data output from the sound generation control section 10. In the selected delay control unit, since the comparator 200 turns on the gates 51 to 56, the performance information passes through the gates 51 to 55, is input to the delay units 41 to 45, and is output from the memory 14. The delay data Ti to be transmitted also passes through the gate 56.

Sound off data, tone color data, pitch data, which are input to the delay units 41, 42, 44 and 45, respectively,
The volume data are all output after a predetermined fixed time delay Td has elapsed. The tone generation ON data input to the delay unit 43 is delayed by the delay data Ti and then output. Therefore, for example, when the rise time of the tone of the wood bass is Ta, Ti obtained by the equation (1) is stored in the memory 14 in association with the tone color data of the wood bass, and the time is set by the delay unit 43. If the delay Ti is added to the tone-on data, the tone-on data can be advanced by Ta relative to the input performance information.

Ti = Td−Ta (1) Note that the predetermined fixed time delay Td is a tone color that has the longest rise time from among the tone colors to be pronounced, and thus must be instructed to be turned on earliest. By setting the rise time, it is possible to reduce the memory that configures the delay units 41 to 45.

The sound generation channels 31 to 33 output musical tones according to the performance information output from the delay control units 21 to 23, and are added to the adder 34 and then output to the sound system 12. Therefore, the sound system 12
A musical tone whose timing of the sound generation on data is adjusted is emitted from.

Since the tone generation channels 31 to 33 do not need the tone generation channel identification operation based on the tone generation channel data, they can be constructed as shown in FIG. In FIG. 4, address generators 201 to 203, a dump memory 211, an envelope memory 212, and a waveform memory 21.
3, the multipliers 221 to 223 have the same configuration as the conventional example.

As described above, according to the present embodiment, of the performance information input to the delay control units 21 to 23, the sound generation ON data is the delay data Ti output from the memory 14 corresponding to the tone color data. Also, since the performance information other than the tone-on data is output with a time delay of Td which is equal to the preset rise time of the tone color having the longest rise time in advance, the tone-on data corresponding to the tone rise time different for each tone color is output. The timing adjustment is performed relative to other performance information, and it is possible to prevent the deviation of the sounding timing due to the tone color.

In the above description, the time from when the sound is turned on until the rhythm of the musical sound is felt has been described as the rise time, but it is not necessarily limited to the peak of the energy of the musical sound waveform, and the so-called music. It is also possible to realize the sounding on-time adjustment for realizing the desired pitch.

[0040]

According to the musical sound synthesizer of the present invention, among the performance information input to the delay control section, the sounding ON data is only the delay data output from the memory in correspondence with the tone color data, and other than the sounding ON data. Since the performance information of is output after being delayed by a predetermined time length, the timing of the sounding ON data is shifted relative to other performance information in correspondence with the tone color data. It is possible to prevent the deviation.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a musical sound synthesizing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a sound source section in FIG.

3 is a block diagram showing an internal configuration of a delay control unit in FIG.

FIG. 4 is a block diagram showing an internal configuration of a sound generation channel in FIG.

FIG. 5 is a block diagram showing a configuration of a conventional musical sound synthesizer.

6 is a block diagram showing an internal configuration of a sound source section in FIG.

7 is a block diagram showing an internal configuration of a sound generation channel in FIG.

8 is a bit configuration diagram of an internal operation in the address generator of FIG.

9 is a storage waveform diagram of each memory of the sound generation channel in FIG. 7.

FIG. 10: Envelope diagram of musical sound waveforms of cymbals and wood bases

FIG. 11 is a timing chart of conventional sound-on data.

[Explanation of symbols]

 10 sounding control unit 12 sound system 13 sound source unit 14 memory 21-23 delay control unit 31-33 sounding channel 34 adder 41-45 delay unit 51-56 gate 200 comparator 201-203 address generator 211 dump memory 212 envelope memory 213 waveform memory 221 to 223 multiplier

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takahiro Sugaya 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Atsuko Tanaka, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A tone generation channel for outputting a musical tone based on performance information including at least tone color data, tone pitch data, sounding on data, and sounding off data, a memory for reading and outputting delay data according to the tone color data, A delay control unit for giving a time delay corresponding to the delay data to the sounding ON data, and giving a predetermined time delay of a predetermined length to the performance information other than the sounding ON data and outputting to the sound generating channel; Sound synthesizer equipped with.