JP5668900B2 - Musical sound generator and operation program - Google Patents

Description

  The present invention relates to an improvement in a musical sound generating device provided with a plurality of types of sound source units.

  For example, in an instrument such as an electronic drum, there has been proposed a device that reads a PCM signal recorded in a memory by a PCM method when necessary and realistically emits a drum hitting sound or the like. Assuming that this electronic drum has a PCM method sound generation function capable of simultaneously generating up to three voices, for example, when performing voice assignment in a simple later priority method, it differs from the performance input intended by the performer. Musical sound is generated. For example, if four consecutive hits are made with a strength of “strong”, “weak”, “weak”, “weak” on the strike surface of the electronic drum, the voice assignment is performed in a simple late priority method. This is because the “strong” of the first strike cancels out the “strong” of the first strike. In order to overcome such drawbacks, a method has been proposed in which a sound having a strong impression (“strong hit signal”) is kept until the sound is finished and the sound is controlled with the remaining two voices. However, even with such a method, if four consecutive hits are made with the strength of “strong”, “medium”, “weak”, and “weak” against the strike surface of the electronic drum, ”Would cancel out the“ middle ”of the second shot. Therefore, it is necessary to realize a musical sound generating device that does not feel musically unnatural by some means. In this regard, when a higher priority is set for each voice in ascending order of the number of voices in the same part (timbre), and all eight voices of the sound source LSI are in a sounding state, a new sounding event has occurred. In some cases, a device has been proposed in which the lowest priority voice is forcibly muted and a sounding event that has occurred is assigned to the voice (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2003-44050 (page 3-5, FIG. 2)

  Certainly, according to the above-described conventional apparatus, although the effect of reducing unnatural pronunciation due to forced mute in consideration of musical elements is recognized, the structure is complex and truly effective, and the sense of discomfort is pronounced. It has not yet been reduced. For example, as described above, when an impact of “strong”, “medium”, “weak”, “weak” is performed on the strike surface of the electronic drum, the process corresponding to the “weak” of the fourth shot It was not performed, and the pronunciation was unnatural.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a musical sound generating apparatus that generates a sense of incongruity as much as possible with a simple configuration.

In order to achieve the above object, the present invention provides a detecting means for detecting performance intensity in a performance operation on a musical instrument,
Determination means for determining which performance intensity detected by the detection means belongs to one of two or more preset intensity ranges;
Sound source means that is provided for each of the two or more preset intensity ranges and performs a sounding operation in response to a voice assignment instruction;
Assignment instruction means for giving a voice assignment instruction to the sound source means corresponding to the intensity range determined by the determination means to which the detected performance intensity belongs;
A memory for recording the two or more types of PCM signals ,
When the voice assignment instruction is given by the assignment instruction means, the two or more types of sound source means read and reproduce the corresponding PCM signal of the actual sound from the memory, and a plurality of voice assignment instructions The feature is that it can be accepted .

  According to this configuration, the determination unit determines which of the two or more preset strength ranges the performance intensity detected by the detection unit that detects the performance intensity in the performance operation on the musical instrument. When the assignment instruction means gives a voice assignment instruction to the sound source means corresponding to the intensity range determined to belong to the detected performance intensity, the corresponding sound source means performs a sounding operation in response thereto. In addition, each of the two or more types of sound source means is configured to perform sound generation operations of sounds having different strengths. As a result, the discomfort of pronunciation caused by the intensity difference, that is, the volume level difference is eliminated, and a musically natural sounding operation can be realized.

When the present invention is applied to an electronic drum, in the above apparatus, the detecting means is a means for detecting a peak value of a shock wave signal obtained by detecting a striking sound by a striking operation on a striking surface of the electronic drum with a vibration pickup, The determination means may be configured to be means for determining which of two or more preset intensity ranges the peak value detected by the detection means belongs. More specifically, three types of the sound source means are provided, and a memory in which a PCM signal recorded by the PCM method is provided for each of the three intensity ranges of the peak value, and the determination means determines that the peak value is A value larger than the first threshold value is a strong level, a peak value larger than a second threshold value smaller than the first threshold value is less than the first threshold value, a medium level, and other peak values are weak. The sound source means to which the voice assignment instruction is given reads out and reproduces the corresponding PCM signal from the memory. When the present invention is applied to a keyboard instrument, the detecting means is a means for detecting a key pressing speed of a key pressing operation on a keyboard included in the keyboard instrument, and the determining means is detected by the detecting means. The key pressing speed may be a means for determining which one of two or more preset strength ranges belongs. According to the present invention, two or more types of intensity ranges set in advance are provided, and sound source means that performs a sounding operation in response to a voice assignment instruction is provided. and a memory for recording a PCM sound signals, said two or more types of the tone generator, when pre-Symbol voice allocation instruction is given, from the memory, and reading and reproducing PCM signals corresponding actual sound, In addition, the musical sound generator capable of accepting a plurality of voice assignment instructions has a function of detecting performance intensity in performance operation on a musical instrument, and the detected performance intensity is within the two or more types of preset intensity ranges. A function for determining which one of them belongs, and a function for giving a voice assignment instruction to the sound source means corresponding to the intensity range determined to belong to the detected performance intensity The computer executable operation program for realizing the also provided.

  According to the present invention, there is an effect that it is possible to provide a musical sound generating device that generates a sense of incongruity as much as possible with a simple configuration.

It is a block diagram of a signal processing system. It is explanatory drawing of operation | movement of a signal processing system. It is explanatory drawing of the waveform of a shock wave signal. It is a typical explanatory view of the appearance on the drum side. It is a top view by the side of a drum. 2 is a configuration diagram of a PCM system signal processing unit 30. FIG. It is explanatory drawing of operation | movement of the determination part. It is explanatory drawing of the table.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, an embodiment of the present invention will be described with respect to an electronic drum as an example of a musical instrument. However, the implementation target of the present invention is not limited to an electronic drum, and performance operation can be performed with strength when playing musical instruments such as stringed instruments and keyboard instruments. It extends to all musical instruments.

  FIG. 4 is a schematic explanatory view showing the appearance of the electronic drum according to the embodiment of the present invention on the drum body side, and FIG. 5 is a plan view thereof. As shown in FIGS. 4 and 5, a striking surface 1 (drum head) is stretched around the shell 200 on an open surface that is an upper surface of the shell 200 of the external-view cylindrical body. A lug 500 is disposed on the outer peripheral surface of the shell 200 with an appropriate interval in the vertical direction. Further, the tension bolt 100 is screwed into the lug 500 through the through-hole formed in the rim 400 so that the rim 400 in which the through-hole of the tension bolt 100 is formed presses the outer edge portion of the striking surface 1. The striking surface 1 is stretched with a predetermined tensioning force. Although not shown in FIGS. 4 and 5, a vibration pickup that detects a vibration signal generated by striking the striking surface 1 and outputs it as a shock wave signal (Su) is applied to an appropriate back surface or surface of the striking surface 1 (drum head). In the position. FIG. 3 is a schematic explanatory diagram of the waveform of the shock wave signal (Su), and the horizontal axis is the time axis (t).

(Signal processing system)
FIG. 1 is a configuration diagram of a signal processing system of an electronic drum according to an embodiment of the present invention. This signal processing system performs analog-to-digital conversion on a shock wave signal (Su) output from a vibration pickup (not shown) that outputs an amplitude signal corresponding to the vibration amplitude of the hitting surface 1 when hitting the hitting surface 1. From the converter 10, the resonance signal processing unit 20 that inputs the analog-digital converted digital signal, the PCM signal processing unit 30 that inputs the analog-digital converted digital signal, and the resonance signal processing unit 20 A gain 60 for amplifying the output signal of the signal, a gain 62 for amplifying the output signal from the PCM system signal processing unit 30, and a mixer 65 (mixing means) for mixing the output signals from both gains 60 and 62 are mixed. A D / A converter 40 for converting the mixing signal into digital / analog, and the digital / analog converted analog signal is emitted as an electronic drum sound. And a speaker 50 of the eye. In addition, the gain 60 and the gain 62 can be individually adjusted with an operator (not shown). The electronic drum includes a signal processing circuit as shown in FIG.

  In addition, a signal (for example, an electronic drum reverberation sound, etc.) obtained by recording an actual percussion instrument sound or the like in advance in the memory 70 is recorded in the memory 70, and the PCM signal processing unit 30 reads a recorded signal from the memory 70 at a predetermined time. And output for playback. FIG. 8 is an explanatory diagram of a table 800 stored in the memory 70 when applied to an electronic drum. In this example, the intensity range of the peak value of the shock wave signal (Su) obtained by hitting the striking surface 1 is divided into three types of “strong”, “medium”, and “weak”, and each peak value is PCM signals to be read and reproduced are recorded separately depending on whether they belong to the intensity range. For example, when it is determined that the intensity range of the peak value of the shock wave signal (Su) obtained by hitting the striking surface 1 belongs to “strong”, the PCM signal “PH” is read and reproduced. Has been. Similarly, when it is determined that the intensity range of the peak value of the shock wave signal (Su) belongs to “medium”, the PCM signal “PM” is read and reproduced, and further, the intensity range of the peak value of the shock wave signal (Su). Is determined to belong to “weak”, the PCM signal “PL” is read and reproduced.

  FIG. 6 is a block diagram of the PCM system signal processing unit 30 shown in FIG. As shown in FIG. 6, the PCM signal processing unit 30 includes a signal processing unit 300 that receives a shock wave signal (Su) and detects its peak value, and outputs the level of the output peak value in three types of intensity ranges. A determination unit 305 that determines which one belongs, an assignment instruction unit 310 that gives a voice assignment instruction to a required sound source unit (320, 322, 324) based on the determination result of the determination unit 305, and these three types of intensity ranges There are three sound source units 320, sound source units 322, and sound source units 324 provided separately, and gain 330, gain 332, and gain 334 provided for each of the three sound source units 320, 322, and 324. The output lines of the three gains 330, 332, and 334 become one, and the entire output can be supplied to the gain 62 in FIG. Further, the gain amounts of the three gains 330, gains 332, and gains 334 can be individually adjusted by an operator (not shown). It should be noted that the number of sound source sections is not particularly limited to three as long as it is two or more. However, in the trial listening experiment, two, three and four have confirmed sufficient effects. Each of the sound source units 320, 322, and 324 is configured to generate a sounding operation in response to a voice assignment instruction, and is configured to be able to assign three sounds, for example, to be able to simultaneously generate sound. ing. That is, each of the sound source units 320, 322, and 324 can give three (predetermined number) voice assignment instructions, and the voice assignment instruction has already been given within three (predetermined number range). And a sound for which a new voice assignment instruction is included in the existing sound and the sound is simultaneously generated.

Further, as shown in FIG. 7, the determination unit 305 determines that the peak value detected by the signal processing unit 300 is “strong level” when the peak value is larger than the first threshold (A), and the peak value is the first threshold ( A value that is larger than the second threshold value (B) smaller than A) and less than or equal to the first threshold value (A) is determined to belong to “medium level”, and other peak values belong to “weak level”. The assignment instruction unit 310 is configured to give a voice assignment instruction to the corresponding sound source units (320, 322, 324) according to the determination result. What tone generator 320 for the "strong" level (high level), the sound source unit 322 is intended for "medium-level" (mid level), the sound source unit 32 4 is for a "low level" (low level) . Therefore, for example, when the determination unit 305 determines that the peak value belongs to the “strong level”, the assignment instruction unit 310 gives a voice assignment instruction to the sound source unit 320, and in response to this, the sound source unit 320 Then, the PCM signal “PH” is read from the memory 70 and reproduced and output.

(Operation)
Next, the operation will be described. If the striking surface 1 is hit with a drum stick or a hand and a vibration pickup (not shown) detects a shock wave signal (Su), the shock wave signal (Su) is converted from analog to digital by the A / D converter 10. The signal processing units 20 and 30 are supplied. The resonance system signal processing unit 20 performs noise removal processing on the shock wave signal (Su), and outputs, for example, a signal having a frequency matching the resonance frequency and a harmonic signal having the resonance frequency. Then, this is amplified by the gain 60 and input to the mixer 65. When the signal from the PCM signal processing unit 30 is also amplified by the gain 62 and input to the mixer 65, both are mixed and the mixed signal is digital / analog converted by the D / A converter 40, and the musical tone signal of the electronic drum is converted to the speaker 50. It will be emitted from.

  Next, with reference to FIGS. 2 and 6, the operation from when the PCM signal processor 30 receives the shock wave signal (Su) to when it is output will be described. The signal processing unit 300 in FIG. 6 performs the processes in step S200, step S210, and step S220 in FIG. Step S230 is a characteristic process of this embodiment. First, in step S200, the signal processing unit 300 generates an envelope signal of the shock wave signal (Su). Next, in step S210, the signal processing unit 300 determines whether or not the generated envelope signal exceeds a predetermined threshold value (th). Only when it is determined that there is an object that exceeds the certain threshold value (th) (Yes in Step S210), the signal processing unit 300 proceeds to Step S220 and determines whether or not the peak value is detected. On the other hand, in other cases (No in step S210), the process ends. Next, if the peak value is detected in step S220 (Yes in step S220), the signal processing unit 300 proceeds to step S230, and otherwise ends the process (No in step S220).

  In step S230, PCM playback is performed. First, when the determination unit 305 receives the peak value output from the signal processing unit 300, the determination unit 305 determines which of the three types of intensity ranges the peak value belongs to. Specifically, the determination unit 305 determines that the peak value is larger than the first threshold value (A) as “strong level”, and the second threshold value (B) where the peak value is smaller than the first threshold value (A). It is determined that a value greater than or equal to the first threshold value (A) belongs to “medium level” and other peak values belong to “weak level” (see FIG. 7). Then, the determination result is passed to the assignment instruction unit 310. When it is determined that the peak value belongs to the “strong level”, the assignment instruction unit 310 gives a voice assignment instruction to the sound source unit 320, and in response to this, the sound source unit 320 sends the PCM signal “ PH "is read out and output. Similarly, when it is determined that the peak value belongs to “medium level”, the assignment instruction unit 310 gives a voice assignment instruction to the sound source unit 322, and in response to this, the sound source unit 322 reads from the memory 70. The PCM signal “PM” is read out, reproduced and output, and when it is determined that the peak value belongs to the “weak level”, a voice assignment instruction is given to the sound source unit 324, and in response to this, the sound source unit 324 Then, the PCM signal “PL” is read from the memory 70 and reproduced and output. Outputs from the sound source units 320, 322, and 324 are amplified by gains 330, 332, and 334, respectively, and output to the gain 62 in FIG. 1. The gain 62 amplifies the PCM signal and supplies it to the mixer 65. As described above, the reverberant sound recorded by the PCM method can be reproduced and output.

  For example, when four consecutive hits with strengths of “strong”, “medium”, “weak”, and “weak” are performed on the hitting surface of the electronic drum, the sound source for the first “strong” The unit 320 performs a sounding operation, and then the sound source unit 322 performs the sounding operation for “medium” of the second hit, and the sound source unit 324 performs the sounding operation for “weak” of the third hit. I do. The sound source unit 324 performs a sounding operation for “weak” of the fourth hit, but this does not cancel the pronunciation (strong, medium) of the first hit or the second hit. The sense of incongruity is resolved.

  In this way, the determination unit 305 determines which of the three intensity ranges the peak value detected by the signal processing unit 300 belongs to, and the assignment instruction unit 310 belongs to the detected peak value. When a voice assignment instruction is given to the sound source unit (320, 322, 324) corresponding to the determined intensity range, the corresponding sound source unit (320, 322, 324) performs a sounding operation in response to this, and there are three types. Since each of the sound source sections (320, 322, 324) is configured to perform a sound generation operation of sounds having different strengths, the unnatural feeling of sound caused by the intensity difference, that is, the volume level difference is eliminated, and the sound is naturally musical. It is possible to realize a sound production operation.

  The above is an explanation of an embodiment in which the present invention is applied to an electronic drum. However, the present invention can also be applied to other musical instruments such as a keyboard instrument having a keyboard section. When the present invention is applied to a keyboard instrument, a key pressing speed detecting means for detecting a key pressing speed, which is a speed when a key is pressed on each key of the keyboard section, is provided. For example, when the key pressing speed detected by the key pressing speed detecting means is larger than the first threshold (A), the determination unit 30 is “high level”, and this peak value is higher than the first threshold (A). Also, it is determined that a value larger than the second small threshold value (B) and equal to or smaller than the first threshold value (A) is determined to belong to “medium level”, and other peak values belong to “weak level”. Then, the assignment instruction unit 310 is configured to give a voice assignment instruction to the corresponding sound source unit (320, 322, 324) according to the determination result, and the sound source unit (320, 322, 324) may be configured to read out and reproduce the corresponding PCM signal from the memory 70, and the present invention can be applied to a keyboard instrument by such a configuration. Of course, the present invention is applicable to any musical instrument as long as it can detect the performance intensity during performance.

  The function of the present invention can be realized by executing an operation program recorded on a recording medium such as a ROM using a RAM or the like as a work area by a CPU or DSP.

  As described above, the number of sound source units and the number of intensity ranges for determination by the determination unit 305 in FIG. 6 may be two or more, and the number is not particularly limited.

  As described above, the present invention can be applied to various musical instruments such as an electronic drum and a keyboard instrument.

10 A / D converter 20 Resonant system signal processing unit 30 PCM system signal processing unit 40 D / A converter 50 Speaker 60 Gain 62 Gain 65 Mixer 300 Signal processing unit 305 Determination unit 310 Assignment instruction unit 320 Sound source unit 322 Sound source unit 324 Sound source unit 330 Gain 332 Gain 334 Gain

Claims (5)

Detecting means for detecting performance intensity in performance operation on the instrument;
Determination means for determining which performance intensity detected by the detection means belongs to one of two or more preset intensity ranges;
Sound source means that is provided for each of the two or more preset intensity ranges and performs a sounding operation in response to a voice assignment instruction;
Assignment instruction means for giving a voice assignment instruction to the sound source means corresponding to the intensity range determined by the determination means to which the detected performance intensity belongs;
A memory for recording PCM signals of actual sounds of two or more different strengths,
The two or more types of sound source means are:
When the voice assignment instruction is given by the assignment instruction means, the PCM signal of the corresponding actual sound is read from the memory and reproduced, and a plurality of voice assignment instructions can be received. Music generator. The apparatus of claim 1.
The detection means includes
A means for detecting a peak value of a shock wave signal obtained by detecting a striking sound by a striking operation on a striking surface of an electronic drum with a vibration pickup
The determination means includes
An apparatus for generating a musical sound, comprising: means for determining which of two or more preset intensity ranges a peak value detected by the detecting means belongs. The apparatus of claim 2.
The sound source means is provided with three types, and further includes a memory that records a PCM signal recorded by the PCM method for each of the three intensity ranges of the peak value,
The determination means includes
When the peak value is larger than the first threshold value, it is a strong level, when the peak value is larger than the second threshold value that is smaller than the first threshold value and less than the first threshold value, it is a medium level, and other than this The peak value is a means for determining that it belongs to a weak level,
The tone generator having the voice assignment instruction reads out and reproduces the corresponding PCM signal from the memory. The apparatus of claim 1.
The detection means includes
A means for detecting a key pressing speed of a key pressing operation on a keyboard included in the keyboard instrument;
The determination means includes
A musical sound generating device, characterized in that it is means for determining which one of two or more preset strength ranges the key pressing speed detected by the detecting means belongs to. Provided for two or more types of intensity ranges set in advance, sound source means for generating a sounding operation in response to a voice assignment instruction, and a memory for recording PCM signals of the two or more types of actual sounds having different intensities with the door, the two or more types of the tone generator, when pre-Symbol voice allocation instruction is given, from the memory, and reading and reproducing PCM signals corresponding actual sound, and a plurality of voice allocation instruction To a musical sound generator that can accept
A function for detecting performance intensity in performance operations on musical instruments;
A function of determining which of the two or more preset strength ranges the detected performance intensity belongs to;
A computer-executable operation program for realizing a function of giving a voice assignment instruction to the sound source means corresponding to the intensity range determined to belong to the detected performance intensity.

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