JP2005128223A - Sound source device and electronic equipment equipped with sound source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable playing of musical sound data with an optimum sound volume even when the number of sound production of the musical sound data is smaller than the number of the sounds that can be produced with a sound source device. <P>SOLUTION: A CPU 31 disposed at the sound source device 3 reads the waveform data of the musical sounds out of a ROM 3 according to the kinds of the musical sounds of the musical sound data and sends the same to a waveform generator 35A of respectively corresponding sound production channels 35 to 37. The waveform signals outputted from the waveform generator 35A are multiplied by the sound volume of the musical sound data at a sound volume adjusting section 35B and are further converted to analog signals at a digital-to-analog conversion section 35C. The analog-converted waveform signals of the respective sound production channels 35 to 37 are synthesized at an analog adder section 38. The synthesized waveform synthesis signal is amplified at an amplifier section 39. The CPU 31 controls the amplifier section 39 so as to compensate the degradation in the output of the waveform synthesis signal generated by the existence of the sound production channels 35 to 37 which do not produce the sounds. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sound source device including a plurality of tone generation channels that generate a waveform signal of a musical sound and a waveform synthesis unit that synthesizes each waveform signal.

  Various devices such as a personal computer, a mobile phone, a game device, and an electronic musical instrument are provided with a sound source device that can generate three sounds, sixteen sounds, and the like based on MIDI performance data, for example. Also, there are performance data having pronunciation numbers of 3 sounds, 16 sounds, and the like. The number of pronunciations of performance data recorded on a recording medium such as a ROM or a hard disk of the device from the beginning of manufacture is generally equal to the number of pronunciations (that is, the number of tone generation channels) that can be generated by the tone generator. On the other hand, when performance data is loaded into a device via a communication line or a recording medium such as a CD and played, the number of pronunciations of the performance data may not match the number of pronunciations that can be generated by the sound source. .

  Although not directly related to the present invention, a plurality of instrument sound generators are classified into low-frequency, medium-frequency and high-frequency instrument sound generators, and the volume of each sound generation signal is individually classified for each class. There has been known an electronic music generating device that increases and decreases output levels for each frequency band after synthesizing sound generation signals that are increased or decreased and further increased or decreased in volume (for example, Patent Document 1).

JP-A-8-297490 (paragraphs 0006 to 0014)

  However, in the above conventional apparatus, the sound source device is configured to output an optimum volume when playing performance data having the number of pronunciations equal to the number of possible pronunciations. For this reason, when the number of pronunciations of performance data is less than the number of possible sound generations of the sound source device, there is a problem that the sound volume output from the sound source device is smaller than the optimum sound volume.

  The present invention solves the above-mentioned problems, and the problem is that even if the number of pronunciations of performance data is less than the number of possible sound generations of the sound source device, the performance is played at an optimal volume. It is an object to provide a sound source device that can be performed and an electronic device including the sound source device.

  In the present invention, a plurality of sound generating means for inputting musical tone data including at least a pitch and outputting a waveform signal of the predetermined pitch for the pitch, and a waveform synthesizing means for synthesizing each waveform signal and outputting a waveform synthesized signal. In the sound source device provided, an amplifying means for amplifying the output of the waveform synthesis signal and a control means for controlling the amplifying means are provided. If the number of simultaneous sounds of the musical sound data is smaller than the reference number that is equal to or less than the number of sounding means, the control means includes sounding means that does not sound as many as the difference between the reference number and the simultaneous sounding number. The amplification means is controlled so as to compensate for a decrease in the output of the waveform synthesis signal caused by the above.

  By doing so, the decrease in the output of the waveform composite signal caused by the existence of sound producing means that does not produce sound corresponding to the difference between the reference number of sound producing means and the simultaneous sound production number of the musical sound data is compensated. Even when the number of simultaneous sounds is smaller than the reference number of sound generating means, the output of the waveform synthesis signal of the sound source device becomes an optimum value. That is, the musical sound data is played at an optimal volume. Here, the reference number of sounding means is a sound source device having sounding means having the same number of sounding means as the number of simultaneous sounding sounds when musical sound data having a simultaneous sounding number smaller than this number is played on the sounding device. This is the number by which a decrease in volume is audibly recognized compared to when performing. Note that the waveform synthesis signal is amplified by, for example, amplifying each waveform signal, or by amplifying the waveform synthesis signal itself, or data input to each sound generation means to generate a waveform signal. This is done by amplifying the data.

  Further, in the present invention, a plurality of sound generating means for inputting musical tone data including at least a pitch and outputting a waveform signal of the pitch of a predetermined musical tone, and a waveform synthesizing unit for synthesizing each waveform signal and outputting a waveform synthesized signal Is provided with amplification means for amplifying the output of the waveform synthesis signal and control means for controlling the amplification means. When the number of simultaneous sound generations of the musical sound data is less than the reference number that is equal to or less than the number of sounding means, the control means outputs the waveform composite signal so that the number of simultaneous soundings of the musical sound data is the same as the reference number. The amplifying means is controlled so as to be equal to the output of the waveform synthesis signal when there is.

  In this way, even if the number of simultaneous sound generations of the musical sound data is smaller than the reference number of the sound generation means, the output of the waveform synthesis signal is the same as the reference number of the simultaneous sound generation of the musical sound data. Therefore, the musical tone data is played at an optimal volume.

  In a preferred embodiment of the above two inventions, the output of the waveform synthesis signal is {(reference number of sounding means) / (simultaneous sounding of musical sound data) at the power level as compared with the case where control by the control means is not performed. The control means controls the amplifying means so as to be multiplied by (number)}. In this way, even if the number of simultaneous sound generations of the musical sound data is less than the reference number of the sounding means, the musical sound data is played at an optimal volume.

  Furthermore, an electronic device of the present invention is an electronic device including the sound source device of the present invention and a communication unit or a recording medium reading unit, and the sound source device receives musical sound data from the communication unit or the recording medium reading unit. Since the electronic device of the present invention (a personal computer, a mobile phone, a game device, an electronic musical instrument, etc. as shown at the beginning) includes the sound source device of the present invention, the same effects as described above can be obtained.

  According to the present invention, the musical sound data is played at an optimal volume even when the number of simultaneous sound generations of the musical sound data is smaller than the number of sounding means of the sound source device.

  FIG. 1 is a block diagram of an electronic device 1 including a sound source device according to the present invention. The CPU 11, ROM 12, RAM 13, etc. are connected to each other via the bus line 10. The CPU 11 controls the operation of the electronic device 1 according to a program stored in the ROM 12. The ROM 12 also stores control data and the like. The RAM 13 stores various data and various control data, and is also used as a calculation work area of the CPU 11. The tone generator 3 receives the tone data via the bus line 10, generates a tone signal according to the tone data, and sends it to the sound system 14. The sound system 14 includes an amplifier, a speaker, and the like. When the volume switch of the operation unit 17 is operated, the amplification factor of the amplifier changes, and the volume output from the speaker increases or decreases.

  The MIDI interface 15 is an interface for transmitting / receiving MIDI data to / from an external device. The MIDI data received from the MIDI interface 15 is recorded on the hard disk 18, the RAM 13, etc., and sent to the sound source device 3 when played. In this case, MIDI data partially processed by the CPU 11 may be sent to the sound source device 3. The communication unit 16 transmits / receives various data or commands including MIDI data to / from an external device. For example, musical tone data such as MIDI data received from the music distribution system on the Internet by the communication unit 16 is recorded in the hard disk 18, the RAM 13, etc., and sent to the sound source device 3 when played. Alternatively, it is sent directly to the RAM 33 (FIG. 2) of the sound source device 3. The MIDI interface 15 and the communication unit 16 described above correspond to the communication means of the present invention.

The operation unit 17 includes various keys used for operation of the electronic device 1. When the electronic device 1 is a personal computer, the operation unit 17 is a keyboard. When the electronic device 1 is an electronic musical instrument, for example, a keyboard is used. When it is a telephone, it is an operation button, and when it is a game machine, it is a joystick or the like.
Various data and programs are stored in the hard disk 18. For example, when the electronic device 1 is a personal computer, this program is loaded into the RAM 13 and executed by the CPU 11.
The disk drive device 19 reads / writes data from / to a removable disk 20 such as a flexible disk, DVD, or CD. Musical sound data such as MIDI data recorded on the hard disk 18 or the removable disk 20 is sent to the tone generator 3 for performance. The drive mechanism inside the hard disk 18 and the disk drive device 19 correspond to the recording medium reading means of the present invention.

  FIG. 2 is a diagram showing a first embodiment of the sound source device 3 according to the present invention. FIG. 3 is a diagram showing musical sound data. The first embodiment will be described with reference to FIGS. The tone generator 3 includes a CPU 31, a RAM 33, a ROM 32, a bus interface unit 34, first to sixteenth sound generation channels 35 to 37, an analog addition unit 38, and an amplification unit 39. Each of the sound generation channels 35 to 37 includes a waveform generation unit 35A, a volume adjustment unit 35B, and a D / A conversion unit 35C. In FIG. 2 and the following drawings, the third to fifteenth sound generation channels are not shown. The bus line 30 to which the CPU 31 and the like are connected is connected to the bus line 10 via the bus interface unit 34.

  The CPU 31 controls the operation of the sound source device 3 according to a program stored in the ROM 32. Further, the CPU 31 is provided with a timer circuit such as a timer, thereby managing and controlling the on / off time of the tone data generation. In the present embodiment, the CPU 31 for the sound source device 3 is provided in addition to the CPU 11 shown in FIG. 1, but the electronic device 1 and the sound source device 3 may be controlled by one CPU. Further, as the CPU 31, a general-purpose microcontroller or DSP (digital signal processor) can be used. For convenience of explanation, it is assumed that the musical sound data to be played is processed by one of the CPUs 11 and 31 and has the format shown in FIG. The musical tone data is temporarily stored in the RAM 33, and is sequentially taken out from it and played.

  FIG. 3A shows musical tone data stored in the RAM 33. Here, it consists of a header and n pieces of musical tone data. The header includes data such as the number of simultaneous sounds of the musical tone data, the number of musical tone data, and the total size of the musical tone data. The simultaneous sound number of music data is the number of sound generation channels 35 to 37 used by the sound data intended by the music data producer. Here, for example, when a chord of a piano “Domiso” is generated, the number of pronunciations is handled as three. However, the number of simultaneous sounds may not exactly match the maximum number of musical sounds that are actually sounded simultaneously in each sound generation channel 35-37. When it is necessary to clearly indicate that there are a plurality of musical sound data, this is referred to as a musical sound data set. The musical tone data set is composed of a series of musical tone data of various musical tones such as a piano sounded by the respective sound generation channels 35 to 37.

  FIG. 3B shows the contents of individual musical tone data. The start time indicates the time when the sound data of each musical tone data is started. Here, it is assumed that the sound generation time of the musical sound data generated at the beginning of the song is 0 seconds. The stop time indicates the time when the sound of each musical tone data is stopped. The musical tone type indicates the type of musical tone of each musical tone data, for example, piano, violin and the like. The CPU 31 assigns sound generation channels 35 to 37 for each musical tone type. However, for example, when a chord of a piano “Domiso” is sounded, three sound generation channels 35 to 37 are assigned. The pitch indicates the pitch of Doremi and other sounds. The volume indicates the loudness.

  The ROM 32 stores a waveform data set for one cycle of a reference pitch (for example, “d” at the center) of each musical tone such as a piano. The actual musical tone waveform is composed of, for example, a piano keystroke waveform and a waveform that is continuously repeated thereafter, but is not a direct matter of the present invention. The following description will be made assuming that only a repetitive waveform is present. The waveform data set for one period is composed of a series of 8-bit waveform data sampled at 44.1 kHz, for example. Therefore, the amplitude of the waveform data has a value in the range of −127 to +127 (in the case of using 2's complement, −128 to +127).

  The CPU 31 sequentially extracts the musical sound data from the RAM 33, assigns sound generation channels 35 to 37 for each musical sound type, sequentially extracts the waveform data of the musical sound type from the waveform data set stored in the ROM 32, and stops from the start time of the sound generation. It supplies to the waveform generation part 35A until time. In this case, if the pitch to be generated is different from the above-mentioned reference pitch, the waveform data is displayed as if the waveform data set was expanded (when the pitch is lower than the reference pitch) or compressed (when the pitch is high) on the time axis. It is taken out from the ROM 32. Since this point is not a direct matter of the present invention, a detailed description is omitted. As described above, since the waveform data is extracted by the CPU 31, the waveform generation unit 35A is configured by an 8-bit parallel latch circuit and holds 8-bit waveform data. In order to reduce the load on the CPU 31, a dedicated circuit for extracting waveform data may be provided in the waveform generation unit 35A.

  The output of the waveform generation unit 35A is sent to a volume adjustment unit 35B composed of a multiplier, where the volume of the musical sound data supplied from the CPU 31 to the waveform signal output from the waveform generation unit 35A (see FIG. 3B). Is multiplied. Instead of the multiplier, the CPU 31 may be caused to multiply the waveform data and the volume. In this case, since the waveform data read from the ROM 32 is multiplied by the volume of the musical tone data and the product is set in the latch circuit of the waveform generation unit 35A, the volume adjustment unit 35B is hardware-wise. It becomes unnecessary.

  The waveform signal that is the output of the volume adjustment unit 35B is converted into an analog waveform signal by a D / A conversion unit 35C that is a D / A converter. The analog-converted waveform signals of the sound generation channels 35 to 37 are combined (added) by an analog adder 38 configured by an operational amplifier (op amp) or the like to become a combined waveform signal. This combined waveform signal is amplified by the amplifying unit 39. The amplification unit 39 has a variable amplification factor, and is composed of, for example, an operational amplifier and an electronic variable resistor group. The amplification unit 39 amplifies an input signal by a later-described volume compensation coefficient sent from the CPU 31. That is, the power of the output signal of the amplifying unit 39 is a value obtained by multiplying the power of the input signal by the volume compensation coefficient.

  Next, volume compensation will be described. In the sound source device 3 having 16 sound generation channels 35 to 37, the waveform of each musical sound is set so that an optimal volume is output from the sound source device 3 when the musical sound data is for 16 sounds (simultaneous pronunciation is 16 sounds). The data size (amplitude) is set. Therefore, the waveform synthesis is performed so that the volume when the musical sound data is played for 3 sounds (simultaneous pronunciation is 3 sounds) and the volume when the musical sound data for 16 sounds is played is acoustically equal. The signal is amplified by the amplifying unit 39 so that the signal is 16/3 times the power level.

Next, the amplification operation will be described. Assuming that the power of the waveform signal of each of the sound generation channels 35 to 37 is P1 to P16, the power of the waveform synthesis signal of the musical tone data having 3 simultaneous sounds and the power of the waveform synthesized signal of the music data having 16 simultaneous sounds. Are represented by the following formulas (1) and (2), respectively.
P1 + P2 + P3 (1)
P1 + P2 + P3 + ... + P16 (2)
Here, if the waveform signals of the sound generation channels 35 to 37 are uncorrelated, the ratio of the expression (1) to the expression (2) is 3/16.

  From the above, the waveform synthesis signal when the musical tone data is 3 tones is 3/16 times the waveform synthesized signal when the musical tone data is 16 tones at the power level. Therefore, the amplification unit 39 amplifies the waveform synthesis signal 16/3 times at the power level, so that even if the tone data is 3 tones, it is substantially the same as the waveform synthesis signal when the tone data is 16 tones. A loud volume can be obtained. In addition, a decrease in the output of the waveform synthesis signal caused by the presence of the sound generation channels 35 to 37 that do not generate sound due to the amplification is compensated. In the following description, it is assumed that the reference number is equal to the number of sounding channels 35 to 37, and {(number of sounding channels) / (number of simultaneous sounding of musical sound data)} is referred to as a volume compensation coefficient.

  Next, the operation of the sound source device 3 will be described. When the musical sound data is stored in the RAM 33, the CPU 31 starts playing the musical sound data. First, a performance table area is secured in the RAM 33, and the performance table is initialized. FIG. 4 shows a performance table. As shown in FIG. 4A, data is stored in the performance table for each of the sound generation channels 35-37. Here, data areas for the first to sixteenth sound generation channels 35 to 37 are secured.

  FIG. 4B shows the details of the data for the sound generation channels 35-37. “Sound generation state” indicates whether or not the sound generation channels 35 to 37 are sounding, and “OFF” indicating that sound generation is not being performed is set by the initialization process. The musical sound data is sequentially read from the head of the musical sound data set (see FIG. 3) by the CPU 31, and the musical sound data at the start time is set in the performance table. At this time, “ON” indicating that sound is being generated is set in the “sound generation state”. In the “stop time”, “pitch”, and “volume”, the contents of the musical sound data (see FIG. 3B) are set. “Waveform data number” indicates the number of waveform data to be read from the waveform data of the waveform data set of the pitch. Here, 0 is set as an initial value, and the waveform data is incremented by one each time the waveform data is taken out from the ROM 32 in order. “Number of waveform data” is the number of waveform data included in the waveform data set of the pitch.

  When the performance is started, for example, a timer interrupt with a period of 44.1 kHz is generated and the program is started. Sound generation processing is performed by this program. FIG. 5 is a flowchart showing the sound generation process of the first embodiment. The operation of the sound generation process will be described with reference to the flowchart.

  When the program is started, an area indicating the number of the current sound generation channel (indicated by “pronunciation CH” in the flowchart) is secured in the RAM 33, and 1 is set therein (S1). Next, it is determined whether or not the current tone generation channel is in the ON state (S2). If it is not in the ON state (OFF state), the process proceeds to S10. If it is ON, it is determined whether or not the current tone generation channel has reached the stop time (S3). If the stop time has been reached, “OFF” is set in the “sound generation state” of the current sound channel (S12), and the process proceeds to S10. If the stop time has not been reached, the waveform data designated by the “waveform data number” in the waveform data set is read from the ROM 32 in accordance with the “pitch” designated by the current tone generation channel (S4). In this case, as described above, when the pitch is different from the reference pitch, the waveform data is fetched from the ROM 32 as if the waveform data set was expanded or compressed on the time axis.

  Next, the read waveform data is multiplied by the “volume” designated by the current tone generation channel (S5), and the product is set in the parallel port of the current tone generation channel (S6). Next, it is determined whether the “waveform data number” is equal to the “number of waveform data” (S7). If equal, it means that the reading of the waveform data for one cycle has been completed, so 0 is set in the “waveform data number” (S8), and the process proceeds to S10. Thereby, the first waveform data of the waveform data set is read next time. If they are not equal, 1 is added to the “waveform data number” (S9), and the process proceeds to S10.

  In S10, it is determined whether or not the number of the current sound channel is 16 (number of the sound channel 37 with the highest number). If it is 16, sound generation processing for all sound channels 35 to 37 is completed. Return to the caller. If it is not 16, 1 is added to the current sound channel (S11), the process returns to S2, and sound generation processing is performed for the next sound channel. While the sound generation process is being performed, the CPU 31 calculates the above-described volume compensation coefficient from the number of simultaneous sounds included in the header (see FIG. 3), and the amplification unit 39 amplifies the waveform synthesis signal based on the calculated value. . As a result, the musical sound data is played at an optimal volume.

  Next, a modification of the first embodiment shown in FIG. 6 will be described. In FIG. 2, after the waveform signals of the sound generation channels 35 to 37 are D / A converted, they are added in an analog manner to generate a waveform synthesis signal. However, in this modification, the waveform data of the sound generation channels 35 to 37 is generated. After the (waveform signal) is digitally added by the digital adder 40, D / A conversion is performed. The digital adder 40 can be realized by a digital adder circuit, but in this modification, a case where the digital adder 40 is realized by software will be described. In this case, an 8-bit parallel port for each of the sound generation channels 35 to 37 is not necessary, and a parallel port for setting a result obtained by adding the waveform data by the CPU 31 is provided in the digital adder 40 instead. Then, the output signal of this parallel port is sent to the D / A converter 41. However, since 16 pieces of waveform data are added, the number of bits of this parallel port is 12 bits.

  FIG. 7 is a flowchart showing the sound generation operation of the embodiment of FIG. The difference between this flowchart and the flowchart of FIG. 5 is that S20 is added before S21, the process of S6 is changed to S26, and S33 is executed before returning to the caller. That is. The differences will be described below. In S20, 0 is set in the addition area for storing the addition result of each waveform data. In S26, the product obtained by multiplying the waveform data of the current tone generation channel by “volume” is added to the addition region. That is, the waveform data of the sound generation channels 35 to 37 are added, and the addition results are totaled. In S33, the result obtained by adding and summing the product obtained by multiplying the waveform data of each of the sound generation channels 35 to 37 in the ON state by the “volume” is stored in the addition region, so that the contents are stored in the parallel port of the digital adder 40. set. Also in this modified example, as in the previous embodiment, the sound volume compensation coefficient is calculated by the CPU 31 while the sound generation process is being performed, and the waveform synthesis signal is amplified by the amplification unit 39 based on the calculated value.

  Further, in the above modification, instead of amplifying the waveform synthesis signal by the amplification unit 39, the addition result of the waveform data is further multiplied by a volume compensation coefficient in S33 of FIG. You may make it set to 40 parallel ports. The value set in the parallel port is D / A converted and output from the sound source device 3.

  Next, a second embodiment will be described with reference to FIG. In the first embodiment, the waveform synthesis signal is amplified, but in this embodiment, the waveform signals of the sound generation channels 35 to 37 are amplified. In the present embodiment, the waveform signals of the sound generation channels 35 to 37 are amplified by the volume compensation coefficient in the amplification unit 35D, and then added in an analog manner in the analog addition unit 38. As the amplifying unit 35D, the same configuration as that of the amplifying unit 39 of FIG. 2 can be used. The sound generation process is the same as that in the first embodiment.

    Next, a modification of the second embodiment will be described with reference to FIG. In the second embodiment, the waveform signal is amplified after being D / A converted. In this modification, the waveform signal of each of the sound generation channels 35 to 37 is digitally amplified by the amplifying unit 35E and then D is amplified. / A conversion. A digital multiplier may be used as the amplifying unit 35E, and the waveform signal may be multiplied by a volume compensation coefficient. However, the volume compensation coefficient may be multiplied by software. In this case, if the multiplication in the volume adjustment unit 35B is also performed by software, parallel ports that hold the result obtained by multiplying the waveform data read from the ROM 32 by the “volume” and the volume compensation coefficient are set to the sound generation channels 35 to 37. It is only necessary to provide one at a time. Also, the sound generation processing operation is changed from S5 in FIG. 5 of the first embodiment to “multiply the read waveform data by the volume and further multiply the volume compensation coefficient”. As shown in the second embodiment and the modification of the second embodiment, even if the waveform signals of the sound generation channels 35 to 37 are amplified by the volume compensation coefficient, the waveform synthesis signal is amplified by the volume compensation coefficient. The same effects as the first embodiment are obtained.

  Next, a third embodiment will be described with reference to FIG. The difference from the first embodiment is that a waveform compensation generator 35F is provided instead of the waveform generator 35A of FIG. In the waveform compensation generation unit 35F, the waveform data read from the ROM 32 is multiplied by a volume compensation coefficient, and the product is set in the parallel port of the waveform compensation generation unit 35F. For this reason, the amplification parts 39, 35D, and 35E of the first and second embodiments are not necessary. As described above, even when the waveform data read from the ROM 32 is multiplied by the volume compensation coefficient, the same effects as those of the first and second embodiments can be obtained. Further, as in the modified example of the first embodiment (FIG. 6), D / A conversion may be performed after digitally adding the waveform signals from the sound volume adjustment units 35B of the sound generation channels 35 to 37. . In the present embodiment, the waveform compensation generator 35F corresponds to the amplification means of the present invention.

  In the embodiment described above, the volume adjustment is performed in the amplifying units 39, 35D, and 35E (or the waveform compensation generating unit 35F) when the number of simultaneous sound generations of the musical sound data is smaller than the number of sound generation channels 35 to 37 of the sound source device 3. I explained the case of doing. In this case, as described above, the reference number is the same as the number of sound generation channels 35 to 37 (ie, 16). On the other hand, for example, even if musical tone data with 32 simultaneous sounds is played by a sound source device having 64 sound generation channels, a decrease in volume is not audibly felt. However, when the number of simultaneous pronunciations is less than 16 sounds, for example, a decrease in volume is felt. Therefore, the reference number is set to a number smaller than the number of sound generation channels (16 in this case), and if the number of simultaneous sound generations is greater than or equal to the reference number, the above-mentioned volume compensation is not performed, and the number of simultaneous sound generations is less than the reference number. If the number is too small, the above-described volume compensation may be performed. That is, the reference number can be set to an arbitrary value equal to or less than the number of sound generation channels.

  In the embodiment described above, the tone data generation process shown in FIG. 3 has been described as an example of the encoded performance data. However, the present invention can be applied to tone data in other formats. . Furthermore, in the above-described embodiment, the configuration of the sound source device 3 is also shown as being realized by a digital circuit or an analog circuit, and realized by hardware or software (program). The present invention can be implemented by changing the above. In the above-described embodiment, information relating to the waveform is described as a waveform signal in terms of hardware and waveform data in terms of software, but both have substantially the same meaning.

It is a block diagram of the electronic device provided with the sound source device according to the present invention. It is a figure which shows 1st Embodiment of the sound source device which concerns on this invention. It is a figure which shows musical tone data. It is a figure which shows a performance table. It is a flowchart which shows the sound generation process of 1st Embodiment. It is a figure which shows the modification of 1st Embodiment. It is a flowchart which shows the sound generation process of the modification of 1st Embodiment. It is a figure which shows 2nd Embodiment. It is a figure which shows the modification of 2nd Embodiment. It is a figure which shows 3rd Embodiment.

Explanation of symbols

1 Electronic equipment 3 Sound generator 15 MIDI interface (communication means)
16 Communication part (communication means)
18 Hard disk (recording medium reading means)
19 Disk drive (recording medium reading means)
31 CPU (control means)
32 ROM
33 RAM
35 First sound channel (pronunciation means)
36 Second sound channel (pronunciation means)
37 16th sound channel
35A waveform generator 35F waveform compensation generator (amplifying means)
38 Analog adder (waveform synthesis means)
39, 35D, 35E Amplifying section (amplifying means)
40 Digital adder (waveform synthesis means)

Claims (4)

A sound source device comprising a plurality of sounding means for inputting musical tone data including at least a pitch and outputting a waveform signal of the pitch of a predetermined musical tone, and a waveform synthesizing unit for synthesizing each waveform signal and outputting a waveform synthesized signal In
An amplifying means for amplifying the output of the waveform synthesis signal and a control means for controlling the amplifying means are provided,
When the number of simultaneous sounds of the musical sound data is less than a reference number that is equal to or less than the number of sounding means, the control means does not sound as much as the difference between the reference number and the simultaneous sounding number. A sound source device characterized by controlling the amplifying means so as to compensate for a decrease in the output of the waveform synthesis signal caused by the presence of. A sound source device comprising a plurality of sounding means for inputting musical tone data including at least a pitch and outputting a waveform signal of the pitch of a predetermined musical tone, and a waveform synthesizing unit for synthesizing each waveform signal and outputting a waveform synthesized signal In
An amplifying means for amplifying the output of the waveform synthesis signal and a control means for controlling the amplifying means are provided,
When the number of simultaneous sounds of the musical sound data is less than a reference number that is equal to or less than the number of the sounding means, the control means outputs the waveform synthesis signal and the number of simultaneous soundings of the musical sound data is equal to the reference number. A sound source device characterized by controlling the amplification means so as to be equal to the output of the waveform synthesis signal when the number is the same. The sound source device according to claim 1 or 2,
Compared with the case where the control by the control means is not performed, the output of the waveform synthesis signal is {(reference number of the sound generation means) / (number of simultaneous sound generation of the musical sound data)} times the power level. The sound source device characterized in that the control means controls the amplification means. An electronic apparatus comprising the sound source device according to any one of claims 1 to 3 and a communication unit or a recording medium reading unit,
The electronic device according to claim 1, wherein the tone generator receives the musical tone data from the communication unit or the recording medium reading unit.

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