JP2016080769A - Electronic musical instrument, musical sound parameter control method and program for electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument capable of switching musical sound parameter such as tone with a simple configuration and simple operation.SOLUTION: When a predetermined mode is specified through a mode SW108, a CPU 106 counts peaks at which a breath input 117 in a predetermined time exceeds a predetermined value based on the output from an absolute value calculation section 105 and a zero-cross detection section 103. The CPU 106 instructs a sound source 109 to change the tone, for example, based on the pattern of the count.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for performing control such as switching musical tone parameters such as timbre in an electronic musical instrument.

  In an electronic musical instrument, tone parameters such as timbre are generally switched using a dedicated function switch.

  Here, with regard to an electronic wind instrument that is an electronic musical instrument corresponding to a saxophone, a clarinet, an oboe, a flute, and the like, conventionally, switching of tone parameters such as timbre has been performed by a dedicated switching means such as a changeover switch. (For example, the technique described in Patent Document 1).

Japanese Utility Model Publication No. 64-45896

  However, in an electronic wind instrument, the performer takes a posture to perform while supporting the instrument itself with fingers of both hands. Therefore, in the conventional technology in which a tone parameter such as a tone is switched by a dedicated switch or the like, every time the operation is performed. There was a problem that it was difficult to maintain the playing posture because the electronic wind instrument had to be taken home from the playing posture.

  Accordingly, an object of the present invention is to enable switching of musical tone parameters with a simple operation and configuration.

  In one example, a sensor for detecting a performance operation, a sound generation instruction means for instructing a sound source to generate sound in response to detection of the performance operation by the sensor, and a performance detected by the sensor within a predetermined time An identification means for identifying a performance operation pattern based on the number and timing of operations, and a control means for controlling a parameter of a musical tone to be generated corresponding to the performance operation pattern identified by the identification means. .

  According to the present invention, it is possible to switch musical tone parameters with a simple operation and configuration.

1 is a diagram showing an embodiment of a system for controlling an electronic wind instrument according to the present invention. It is a figure which shows the signal waveform example in this embodiment. It is explanatory drawing (the 1) of Peak detection processing. It is explanatory drawing (the 2) of Peak detection operation | movement. It is explanatory drawing (the 1) of the count pattern of Peak. It is explanatory drawing (the 2) of the count pattern of Peak. It is explanatory drawing (the 3) of the count pattern of Peak. It is explanatory drawing (the 4) of the count pattern of Peak. It is explanatory drawing (the 5) of the count pattern of Peak. It is explanatory drawing which shows the relationship between the predetermined time range t, a note, a tempo, and a sampling timing. It is explanatory drawing (the 6) of the count pattern of Peak. It is explanatory drawing (the 7) of the count pattern of Peak. It is explanatory drawing which shows the relationship between the operation | movement of a system, and a guide sound. It is a figure which shows the register group (the 1) for a timbre change process. It is a figure which shows the count pattern matching verification table. It is a figure which shows the register group (the 2) for a timbre change process. It is a flowchart which shows the example of the main process of an electronic wind instrument system. It is a flowchart (the 1) which shows the example of an interruption process every 50 microseconds. It is a flowchart (the 2) which shows the example of an interruption process every 50 microseconds.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a system for controlling an electronic wind instrument according to the present invention.

  The system of the present embodiment includes a low-pass filter (“LPF” in the figure) 101, amplifiers (“Amp” in the figure) 102 and 104, a zero-cross detection unit 103, an absolute value calculation unit 105, a CPU (Central Processing Unit) 106, A key matrix 107, a mode switch (“mode SW” in the figure) 108, a sound source 109, a D / A (digital / analog) converter 110, an amplifier 111, and a speaker (“SP” in the figure) 112 are provided. The CPU 106 also includes a code / interrupt circuit 113, an A / D (analog / digital) converter 114, a timer 115, a memory 116, and a breath sensor 117.

  The continuously changing breath state of the performer is detected by the breath sensor 117, and a signal output from the breath sensor 117 is input to the LPF 101. The LPF 101 cuts overtone components of this signal. The output of the LPF 101 is amplified by the Amp 102. FIG. 2 is a diagram showing an example of signal waveforms in the present embodiment. 2A shows an example of a signal waveform of the output of the breath sensor 117 (point A in FIG. 1), and FIG. 2B shows an example of a signal waveform of the output of the Amp 102 (point B in FIG. 1). FIG. As can be seen by comparing FIGS. 2A and 2B, the harmonic component in the output of the breath sensor 117 is cut and converted into a smooth waveform so that the peak can be easily detected.

  The zero-cross detector 103 detects the timing at which the amplitude value crosses the value 0 from the output signal of the Amp 102 (point B, FIG. 2B). This detection output is input to the code / interrupt circuit 113 in the CPU 106 as it is (C point) or after being amplified by the Amp 104 (E point). The sign / interrupt circuit 113 generates a binary digital signal based on the input analog signal waveform. FIG. 2C is a diagram showing an example in which the signal waveform at the point C or point E is converted into a binary digital signal waveform by the sign / interrupt circuit 113. This digital signal waveform has a logical value 1 in a section where the amplitude value of the output signal of the LPF 101 (Amp 102) is a positive value and a logical value in a section where the negative value is a result as a result of detecting a zero cross by the zero cross detection unit 103. It is a binary digital signal having zero.

  The absolute value calculation unit 105 calculates the absolute value of the output signal (point B, FIG. 2B) of the Amp 102. This calculated output (D point) is input to the A / D converter 114 in the CPU 106. The A / D converter 114 specifies the timer 115 in the CPU 106, interrupts it every 50 μs (μs), for example, and A / D converts the input analog signal waveform into a digital signal waveform. FIG. 2D shows an example of the signal waveform at the point D. This signal waveform has a waveform in which a section in which the amplitude value of the output signal of the LPF 101 (Amp102) is a negative value is folded back to the positive side.

  The timer 115 controls the sampling of the A / D converter 114 described above and has a role of counting various predetermined times described later.

  The memory 116 stores various control data.

  The CPU 106 is connected to a key matrix 107 for reading the performance operation keys of the electronic wind instrument and a mode SW 108 for designating the tone color change mode on (on) and off (off). In addition, a sound source 109 controlled by a MIDI (Musical Instrument Digital Interface) signal is externally attached to the CPU 106. The sound source 109 generates a corresponding musical tone signal in response to a tone generation instruction based on note-on / note-off and tone color designation from the CPU 106, and outputs it to the D / A converter 110. The D / A converter 110 converts the digital musical tone signal output from the sound source 109 into an analog musical tone signal. The analog musical sound signal is amplified by the amplifier 111 and then emitted from the speaker 112.

  In the present embodiment, the CPU 106 extracts the player's breath input timing from the digital signal waveform input from the absolute value calculator 105 via the A / D converter 114. For this purpose, the CPU 106 first detects a peak (hereinafter referred to as “Peak”) having a value equal to or greater than a predetermined threshold (threshold) from the digital signal waveform.

  FIG. 3 is an explanatory diagram (part 1) of the peak detection process. In the present embodiment, for simplification of processing, only the positive waveform of the digital signal waveform illustrated in FIG. 3 is processed, and the negative waveform is ignored. For this purpose, the CPU 106 is a digital signal waveform (see FIG. 2D) inputted from the A / D converter 114 in FIG. Only the signal in the section where the value in FIG. 2C is 1 is processed, and the signal values in the other sections are all processed as zero. Note that only the negative waveform or both waveforms may be processed.

  As such Peak detection from the digital signal waveform, a prediction curve 302 indicated by a broken line in FIG. 3 is used. Then, for each interrupt timing (sampling timing) n (n is an integer of 0 or more) by the timer 115 having a sampling frequency of 50 μs, the current peak value an output from the A / D converter 114 and the prediction at the sampling timing n The predicted value bn on the curve 302 is compared. And the process by the following algorithm is performed.

  First, as the case 1, at the sampling timing n, when the current peak value an ≧ predicted value bn, the Peak detection_flag held in the memory 116 is turned on, and the start point of the prediction curve 302 is the current wave. The predicted value bn + 1 at the next sampling timing n + 1 is calculated by updating to the high value an. This is a case where the peak value of the negative waveform passes the zero value and becomes a positive waveform, and the peak value increases. For example, this is the case of the peak value a1 and predicted value b1, a2 and b2, a3 and b3, and a4 and b4 in FIG. At this time, the prediction value 302 for the next sampling timing is calculated using the prediction curve 302 of the following equation (1).

    bn = an × (1-1 / 256) −1 (1)

In the example of FIG. 3, for example, b2 to b5 are calculated as follows.
b2 = a1 × (1-1 / 256) −1
b3 = a2 × (1-1 / 256) −1
b4 = a3 × (1-1 / 256) −1
b5 = a4 × (1-1 / 256) −1

  On the other hand, as the case 2, at the sampling timing n, when the Peak detection_flag is on, the current peak value an <the predicted value bn, and one sample (50 μs) before the current peak value an When the peak value an-1 of the current value is equal to or greater than the predetermined threshold S, the peak value an-1 is recognized as Peak. For example, in the case of the peak value a5 and the predicted value b5 in FIG. 3, the peak value a4 is recognized as Peak.

  FIG. 4 is an explanatory diagram (part 2) of the peak detection process in case 2. Peak value an-1 = α1, α1 ′, α2 ′, α2, α2 ″, α3 ′, α3, α3 ′ when Peak detection_flag is on and current peak value an <predicted value bn ′, Α4 ′, α4, etc., α1, α2, α3, α4, etc. exceeding the threshold S are detected as Peaks, and α1 ′, α2 ′, α2 ″, α3 ′, α3 ′ below the threshold S are detected. , And α4 ′ are not detected as Peak. The CPU 106 stores the peak value detected in this way (a4 in the example of FIG. 3) in the memory 116. In the following description, each Peak value recognized as shown in FIG. 4 is described as α1, α2, α3,.

  In Case 2, after the above processing, the Peak detection_flag on the memory 116 is turned off. Then, the start point of the prediction curve 302 is set as the prediction value bn at the current sampling timing n, and the prediction curve 302 of the following equation (2) is used to calculate the prediction value bn for the next sampling timing. The

    bn = bn × (1-1 / 256) −1 (2)

In the example of FIG. 3, for example, b6 (not shown) is calculated as follows.
b6 = b5 × (1-1 / 256) −1

  As Case 3, when the Peak detection_flag is off at the sampling timing n and the current peak value an <prediction value bn, the start point of the prediction curve 302 is not changed (b5 in FIG. 3). Only the predicted value bn is updated according to the equation (2). This is a case where the peak value of the positive waveform decreases past Peak.

  Thereafter, the sampling of the waveform proceeds, and when the value of zero of the waveform on the negative side passes through the value zero and becomes a waveform on the positive side again, the peak value starts increasing again, as shown by the relationship between a1 and b1 in FIG. Case 1 is entered.

5 to 9 are explanatory diagrams of Peak count patterns detected by the CPU 106 by the above-described Peak detection processing based on the output of the breath sensor 117 after the mode SW 108 of FIG. 1 is turned on. In these figures, Peaks detected by Peak detection processing are indicated as α1 to α7 and the like. For the sake of explanation, the predetermined time range t is divided into eight, and t / 4 is a quarter note for ease of understanding.
t / 8 is expressed as an eighth note ♪. FIG. 10 is an explanatory diagram showing the relationship among the predetermined time range t, notes, tempo, and sampling timing in the A / D converter 114. In the CPU 106, an interrupt is generated every 50 μs by the timer 115, and sampling is performed by the A / D converter 114 based on this interrupt. With this as a reference, the resolution of the tempo (Tempo in the figure) for determining a note is, for example, 1 millisecond (ms). Here, the predetermined time range t is, for example, a time range of one measure, for example, 2 seconds, and a large “x” mark in FIG. 10 indicates a break of the measure. Moreover, a small “x” mark indicates a break of a beat (in the case of quadruple time). In this case, the note length of a quarter note is 0.5 seconds (in the case of an eighth note, it is 0.25 seconds). Here, the CPU 106 recognizes each Peak detection timing stored in the memory 116 as a beat break indicated by a small “x” mark. In other words, the performer makes a breath input in consideration of the beat. At this time, within the range of Peak detection timing ± 10 ms (see 1001 in FIG. 10), it is determined which note has been breathed by recognizing the beat.

  The CPU 106 determines the Peak count pattern in the predetermined time range t based on the above operation. Then, according to the count pattern, it is determined which one of the values 0 to 9 is designated by the performer.

  As shown in FIG. 5A, the CPU 106 determines that the value 0 is designated when it is determined that the count pattern is four consecutive quarter notes.

  When the CPU 106 determines that the count pattern is three consecutive quarter notes followed by two consecutive eighth notes as shown in FIG. 5B, the value 1 is designated. It is determined that

  As shown in FIG. 6C, the CPU 106 determines that the count pattern is two consecutive quarter notes, followed by two consecutive eighth notes, and then one quarter note. If it is determined, it is determined that the value 2 is designated.

  When the CPU 106 determines that the count pattern is two consecutive quarter notes followed by four consecutive eighth notes as shown in FIG. 6D, the value 3 is designated. It is determined that

  As shown in FIG. 7E, the CPU 106 determines that the count pattern is one quarter note, followed by two consecutive eighth notes, and then two consecutive quarter notes. If it is determined, it is determined that the value 4 is designated.

  As shown in FIG. 7 (f), the CPU 106 determines that the count pattern is one quarter note, followed by two consecutive eighth notes, followed by one quarter note, followed by two. If it is determined that there are eight consecutive eighth notes, it is determined that the value 5 is designated.

  As shown in FIG. 8G, the CPU 106 determines that the count pattern is one quarter note, followed by four consecutive eighth notes, and then one quarter note. In the case, it is determined that the value 6 is designated.

  When the CPU 106 determines that the count pattern is one quarter note followed by six consecutive eighth notes, as shown in FIG. 8 (h), the value 7 is designated. judge.

  If the CPU 106 determines that the count pattern is two consecutive eighth notes followed by three consecutive eighth notes, as shown in FIG. 9 (i), the value 8 is designated. It is determined that

  As shown in FIG. 9 (j), the CPU 106 determines that the count pattern is two consecutive eighth notes, two consecutive quarter notes, and two subsequent eighth notes. If it is determined that there is, it is determined that the value 9 is designated.

  Next, FIG. 11 and FIG. 12 are explanatory diagrams of Peak count patterns for a timbre change command. When the CPU 106 determines that the count pattern in a predetermined time range t is six consecutive eighth notes and one quarter note following it, as shown as “Command A” in FIG. Determines that “Command A” is designated. “Command A” is a command designation for designating the upper digit of the timbre. Therefore, as shown in FIG. 11, the CPU 106 determines which of the values 0 to 9 described above with reference to FIGS. 5 to 9 in the next predetermined time range t + 1 following the predetermined time range t in which “Command A” is specified. By determining the count pattern, the value of the upper digit is specified.

  When the CPU 106 determines that the count pattern in a predetermined time range t is eight consecutive eighth notes as shown as “Command B” in FIG. 12, “Command B” is designated. It is determined that “Command B” is a command designation for designating the lower digit of the tone color subsequently. Therefore, as shown in FIG. 12, in the next predetermined time range t + 1 following the predetermined time range t in which the “Command B” is designated, the CPU 106 selects any of the values 0 to 9 described above with reference to FIGS. By determining the count pattern, the lower digit value is specified.

  As described above, the CPU 106 designates the breath pattern of “Command A” based on the output of the performer's breath 117 sensor (FIG. 1), designates one of the values 0 to 9 and “Command”. When the designation of the “B” breath pattern and the subsequent designation of any of the values 0 to 9 are determined, the tone generator 109 shown in FIG. 1 is changed to the tone corresponding to the tone number consisting of the upper and lower two digits. Instruct. In this way, the performer changes 100 timbres from timbre numbers 00 to 99 by using the output 117 of the breath sensor after the mode SW 108 is turned on, and holds both hands from the key matrix 107 (FIG. 1) of the electronic wind instrument. It becomes possible to carry out without releasing.

  FIG. 13 is an explanatory diagram showing the relationship between the operation of the system and the guide sound. In the present embodiment, at the time of the output 117 of the breath sensor, a guide sound is generated in order to guide the player in an easy-to-understand manner to input measures and beats within a predetermined time range t. A sound indicating that various patterns have been recognized is also generated. FIG. 13 shows how the system of FIG. 1 operates and what kind of guide sound is played when the output 117 (FIG. 1) of the breath sensor for timbre change by the performer based on the above-described designation method. It is a figure explaining whether to advance.

  First, the predetermined time range t is cyclically repeated, and a Tempo sound is engraved every 0.5 seconds. That is, the CPU 106 generates a sound of a tempo sound (guide sound) with a large sound volume at the sound source 109 (FIG. 1) at the timing of a large “×” mark, that is, at a timing of a predetermined time range t once every 2 seconds, for example. Instruct. Further, the CPU 106 instructs the sound source 109 to generate a tempo sound (guide sound) with a small volume at the timing of a small “x” mark, that is, once every 0.5 seconds, for example.

Next, when the CPU 106 recognizes the breath pattern according to FIG. 11 or FIG. 12, the CPU 106 instructs the sound source 109 to pronounce the following to indicate that it has been recognized.
In FIG. 13, a mark ●: a sound recognizing “Command A”.
A circle in FIG. 13: a sound recognizing “Command B”.
In FIG. 13, the ■ mark: a sound that recognizes the values 0 to 9 of the timbre change upper digits following “Command A”.
□ in FIG. 13: A sound that recognizes the values 0 to 9 of the timbre change lower digits following “Command B”.
Following the sound generation, the CPU 106 instructs the sound source 109 in FIG. 1 to change to the timbre corresponding to the timbre number consisting of the upper and lower two digits, and based on this instruction, the sound source 109 To change.

  FIG. 14 is a diagram showing a register group (part 1) for timbre change processing. These registers are stored as variables on the memory 116 in FIG. 1, and are used when the CPU 106 executes the tone color changing process shown in the flowcharts of FIGS. 17, 18, and 19 described later.

  In FIG. 14, a register Timer_50 μs is a counter register that counts values 0 to 19 in units of 50 μs based on an interrupt from the timer 115 in FIG. When the value of this register reaches 20, the CPU 106 clears the value to zero, and increments the value of a register Timer_1ms described later by +1 every 1 ms.

  In FIG. 14, a register Timer_1ms is a counter register that counts Tempo and counts values from 0 to 1999 in units of 1ms. When the value of this register reaches 2000, the CPU 106 clears the value to zero, and increments the value of a register Timer_250ms described later by +1 every 250 ms.

  In FIG. 14, a register Timer_250ms is a counter that counts from the value 0 to 7 in units of 250ms and engraves eighth-note units. When the value of this register reaches 8 (2000 ms), the CPU 106 clears the value to zero.

  In FIG. 14, a register Timer_quaver [Timer_250 ms] is a register for indicating a quantization range of ± 10 ms with respect to the timing indicated by the register Timer_250 ms. At the timing indicated by the register Timer_250ms, if there is a Peak counted by the counter value of the register Timer_1ms within the range indicated by the register Timer_quaver [Timer_250ms], a flag on indicating that the Peak exists at the timing indicated by the register Timer_250ms is set. Is done. Specifically, the registers Timer_quaver [0] to Timer_quaver [7] have the following ranges, respectively.

  In FIG. 14, the register Timer_quaver [0] outputs a range of 0000 to 0010 ms or 1990 to 2000 ms. If Peak is present in this range when the value of the register Timer_250ms is 0, a flag indicating that Peak exists at the timing of the first eighth note is displayed in the first interval 0 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [1] outputs a range of 240 to 260 ms. If Peak is present in this range when the value of the register Timer_250ms is 1, a flag indicating that Peak exists at the timing of the second eighth note is displayed in the second section 1 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [2] outputs a range of 490 to 510 ms. If Peak is present in this range when the value of the register Timer_250ms is 2, a flag indicating that Peak is present at the timing of the third eighth note is displayed in the third section 2 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [3] outputs a range of 740 to 760 ms. If Peak is present in this range when the value of the register Timer_250ms is 3, a flag indicating that Peak is present at the timing of the third eighth note is displayed in the third section 2 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [4] outputs a range of 990 to 1010 ms. If Peak is present in this range when the value of register Timer_250ms is 4, a flag indicating that Peak is present in the timing of the fourth eighth note is displayed in the fourth interval 3 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [5] outputs a range of 1240 to 1260 ms. If Peak is present in this range when the value of the register Timer_250ms is 5, a flag indicating that Peak exists at the timing of the fifth eighth note is displayed in the fifth section 4 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [5] outputs a range of 1240 to 1260 ms. If Peak is present in this range when the value of the register Timer_250ms is 5, a flag indicating that Peak exists at the timing of the fifth eighth note is displayed in the fifth section 4 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [6] outputs a range of 1490 to 1510 ms. If Peak is present in this range when the value of the register Timer_250ms is 6, a flag indicating that Peak exists at the timing of the sixth eighth note is displayed in the sixth section 5 in the predetermined time range t. Set accordingly.

  In FIG. 14, the register Timer_quaver [7] outputs a range of 1740 to 1760 ms. If Peak is present in this range when the value of the register Timer_250ms is 7, a flag indicating that Peak exists at the timing of the seventh eighth note is displayed in the seventh section 6 in the predetermined time range t. Set accordingly.

  Next, in FIG. 14, the register “Bresh_on_off [Timer_250 ms]” is set to “on” if Peak exists in the range of the register Timer_quaver [Timer_250 ms] for each section indicated by the register Timer_250 ms, and “off” is set otherwise. .

  FIG. 15 shows a count pattern match verification table, which is stored in the memory 116 of FIG. This table shows which type (Type in the figure) for each combination (count pattern) in which Peak exists (on) or does not exist (off) in each of sections 0 to 7 obtained by dividing one measure into eighth notes. Indicates whether the information is specified. When the CPU 106 finalizes eight values of the registers “Bress_on_off [0]” to “Bress_on_off [7]” in FIG. 14, the CPU 106 determines which type in the count pattern match verification table in FIG. Determine and output the corresponding Type. When the CPU 106 determines Type 0 to Type 9, the CPU 106 outputs a value 0 to a value 9. When the CPU 106 determines Type E, it outputs “Command A”. If the CPU 106 determines Type F, it outputs “Command B”.

  FIG. 16 is a diagram showing a register group (part 2) for timbre change processing. These registers are stored as variables on the memory 116 in FIG. 1, as in the register group in FIG. 14, and the CPU 106 executes the tone color changing process shown in the flowcharts of FIGS. 17, 18 and 19 described later. Used when.

  The register S stores the predetermined threshold S described with reference to FIG. This value may be changed dynamically.

  The register Command stores whether “Command A” has been identified as a result of identification of the count pattern (see FIG. 11) or “Command B” has been identified. If the register Command = A, the next input data is the value of the timbre upper digit (see FIG. 11), and if the register Command = B, the next input data is the value of the timbre lower digit (see FIG. 11). 12).

  The register an stores the peak value output from the A / D converter 114 of FIG. 1 described above with reference to FIG. The register bn stores a predicted value calculated based on the expression (1) or (2) described above with reference to FIG.

  The register Peak detection_flag is the flag described above with reference to FIG. 3, and is set to on when the Peak detection state is set, and set to off at other times.

  The register tone color upper digit stores the upper digit of the tone color number described above with reference to FIG. The register tone color upper digit stores the lower digit of the tone number described above with reference to FIG.

  FIG. 17 is a flowchart showing an example of main processing of the electronic wind instrument system according to the present embodiment. This main process is an operation in which the CPU 106 in FIG. 1 executes a main process program stored in an internal ROM (read only memory) (not shown), and the player turns on a power button (not shown). As a result, the execution is started.

  In FIG. 17, the CPU 106 first executes various processes (step S1701). Here, processing generally executed as an electronic wind instrument is executed. For example, processing for fetching a specified performance key from the key matrix 107, note-on or note-off is detected, and sound generation or muting is instructed to the sound source 109. Processing is executed.

  Next, the CPU 106 determines whether or not the performer has switched the mode SW 108 of FIG. 1 from off to on (step S1702). If the determination in step S1702 is NO, the CPU 106 determines whether or not the performer has switched the mode SW 108 of FIG. 1 from on to off (step S1703). If the determination in step S1703 is also NO, the CPU 106 returns to the process in step S1701.

  If the determination in step S1702 is YES, the CPU 106 executes a series of processing from step S1704 to S1711.

  First, the CPU 106 resets all the count values of the register Timer_50 μs, the register Timer_1 ms, and the register Timer_250 ms (see FIG. 14) to the value 0 (zero) (step S1704).

  Next, the CPU 106 resets each value of the registers Bless_on_off [0] to Bless_on_off [7] (see FIG. 14) to off (step S1705).

  Next, the CPU 106 sets the value of the register Command (see FIG. 17) to “A” (step S1706).

  Next, the CPU 106 stores the value 0 in both the register tone color upper digit and the register tone color upper digit (see FIG. 17) (step S1707).

  Next, the CPU 106 sets a predetermined threshold value (A / D value) in the register S (see FIG. 17) (step S1708).

  Next, the CPU 106 sets the value of the register Peak detection_flag (see FIG. 17) to off (step S1709).

  Further, the CPU 106 initializes the value of the register bn (see FIG. 17) to 0 (step S1710).

  Finally, the CPU 106 instructs the timer 115 of FIG. 1 to start an interrupt notification every 50 μs (step S1711). Thereafter, the CPU 106 returns to the process of step S1701.

  On the other hand, if the determination in step S1703 is YES, the CPU 106 instructs the timer 115 in FIG. 1 to stop interrupt notification every 50 μs instructed to start in step S1711 (step S1712). Thereafter, the CPU 106 returns to the process of step S1701.

  FIG. 18 is a flowchart illustrating an example of interrupt processing for every 50 μs executed by an interrupt notification for every 50 μs by the timer 115 instructed to start in step S1711 of FIG. This interrupt process is an operation in which the CPU 106 in FIG. 1 executes a 50 μs interrupt process program stored in an internal ROM (not shown) in particular by an interrupt to the main process shown in the flowchart of FIG.

  First, the CPU 106 stores the output of the A / D converter 114 of FIG. 1 in the register an (step S1801).

  Next, the CPU 106 determines whether or not the value of the register an is greater than or equal to the value of the register bn (step S1802).

  If the determination in step S1802 is YES, the CPU 106 executes a series of processing from step S1803 to S1807. This case corresponds to case 1 described above with reference to FIG.

  First, the CPU 106 calculates a predicted value for the next sampling timing based on the equation (1) for the prediction curve 302 of case 1 described above with reference to FIG. 3, and stores the calculated value in the register bn. (Step S1803).

  Next, the CPU 106 determines whether or not the value of the register bn calculated in step S1803 is smaller than 0 (step S1804), and if the determination is YES, stores the value 0 in the register bn ( Step S1805). This is because the negative waveform is not processed in this embodiment as described above.

  Thereafter, the CPU 106 determines whether or not the peak value of the register an set in step S1801 is not 0 (step S1806). If this determination is YES (not 0), the register Peak detection_flag is set to on. To do. The case in which Peak detection_flag is turned on in case 1 has been described above with reference to FIG.

  Thereafter, the CPU 106 proceeds to the process of step S1816 described later.

  On the other hand, if the determination in step S1802 is NO, CPU 106 executes a series of processing from steps S1808 to S1815. This case corresponds to Case 2 or Case 3 described above with reference to FIG.

  First, the CPU 106 determines whether or not on is set in the register Peak detection_flag (step S1808). If the determination in step S1808 is YES, it corresponds to case 2 described above, and if NO, it corresponds to case 3 described above.

  If the determination in step S1808 is YES, the CPU 106 determines whether or not the value of the register an is greater than or equal to the threshold set in the register S (step S1809).

  If the determination in step S1809 is NO, the CPU 106 proceeds to step S1812 without performing Peak detection (see FIG. 4).

  If the determination in step S1809 is YES, the CPU 106 determines whether or not the value of the register Timer_1ms is within the value range indicated by the register Timer_quaver [Timer_250ms] corresponding to the current value of the register Timer_250ms (see FIG. 14). (Step S1810). If the determination in step S1810 is NO, the CPU 106 proceeds to step S1812 without performing Peak detection because the timing of the player's breath input 117 (FIG. 1) does not match the timing of the beat (see 1001 in FIG. 10). ).

  If the determination in step S1809 is YES, the CPU 106 sets the value of the register Bress_on_off [Timer_250ms] corresponding to the section indicated by the current value of the register Timer_250ms to on (step S1811).

  Thereafter, the CPU 106 calculates a predicted value for the next sampling timing based on the equation (2) for the prediction curve 302 of case 2 described above with reference to FIG. 3, and stores the calculated value in the register bn. (Step S1812).

  Next, the CPU 106 determines whether or not the value of the register bn calculated in step S1812 is smaller than 0 (step S1813), and if the determination is YES, stores the value 0 in the register bn ( Step S1814). This is because the negative waveform is not processed in this embodiment as described above.

  Thereafter, the CPU 106 sets off the register Peak detection_flag. As described above with reference to FIG. 3, the Peak detection_flag is turned off in the case 2.

  Thereafter, the CPU 106 proceeds to the process of step S1816 described later.

  On the other hand, if the determination in step S1808 is YES, this corresponds to case 3 described above with reference to FIG. 3, and thus the CPU 106 skips the processing for detecting the peak from steps S1809 to S1811 and performs the above-described steps S1812 to S1815. Only the process of updating the register bn and the process of turning off the register Peak detection_flag are executed.

  After the process of step S1806, S1807, or step S1815, the CPU 106 increments the value of the register Timer_50 μs by +1 (step S1816).

  The CPU 106 determines whether or not the value of the register Timer_50 μs incremented in step S1816 is equal to or greater than 20 corresponding to 1 ms of Tempo resolution (see FIG. 10) (step S1817).

  If the determination in step S1817 is NO, the CPU 106 returns from the interrupt process every 50 μs exemplified in the flowchart of FIG. 18 to the main process exemplified in the flowchart of FIG.

  If the determination in step S1817 is YES and the peak detection in the predetermined time range t is completed, the CPU 106 executes the process every 1 ms shown in the flowchart of FIG.

  First, the CPU 106 resets the value of the register Timer_50 μs to 0 (step S1901).

  Next, the CPU 106 increments the value of the register Timer_1ms by +1 (step S1902).

  Next, the CPU 106 determines whether or not the value of the register Timer_1ms incremented in step S1902 is equal to or greater than 2000 corresponding to the end of the predetermined time range t (see FIG. 10 or FIG. 13) (step S1903). ).

  If the determination in step S1903 is NO, the CPU 106 determines whether or not the remainder obtained by dividing the value of the register Timer_1ms by 500 is 0, that is, whether the beat timing is divided every 500 ms (0.5 sec (seconds)). It is determined whether or not (step S1904). If the determination in step S1904 is YES, as described above with reference to FIG. 13, the beat timing indicated by a small “x” has been reached, so the CPU 106 instructs the sound source 109 to generate a tempo sound (guide sound) with a small volume. (Step S1905).

  Thereafter, the CPU 106 determines whether or not the remainder obtained by dividing the value of the register Timer_1ms by 250 is 0, that is, whether or not the beat timing is divided every 250 ms (step S1906). If the determination in step S1906 is YES, the CPU 106 increments the value of the register Timer_250ms by +1 (step S1907).

  Thereafter, the CPU 106 returns from the interrupt process every 50 μs illustrated in the flowcharts of FIGS. 18 and 19 to the main process illustrated in the flowchart of FIG. 17.

  When the value of the register Timer_1ms reaches the value 2000 corresponding to the end of the predetermined time range t and the determination in step S1903 becomes YES, the CPU 106 first resets the value of the register Timer_1ms to 0 (step S1908).

  Next, as described above with reference to FIG. 13, since the timing of the break of the bar marked with a large “×” is reached, the CPU 106 instructs the sound source 109 to generate a tempo sound (guide sound) with a large volume (step S <b> 1909). ).

  Next, the CPU 106 resets the value of the register Timer_250ms to 0 (step S1910).

  Next, as described above with reference to FIG. 15, the pattern of the eight values of the registers Bress_on_off [0] to Bress_on_off [7], which is determined at the end of the predetermined time range t, is the count pattern of FIG. It is determined whether it matches any of Type 0 to 9, Type E, or Type F in the match verification table (step S1911).

  If the determination in step S1911 is YES, the CPU 106 determines whether or not the pattern matches Type E in FIG. 15 (step S1912). If this determination is YES, as described above with reference to FIG. The CPU 106 instructs the sound source 109 in FIG. 1 to generate a sound that has recognized “Command A” corresponding to the mark ● in FIG. 13 (step S1913). The CPU 106 sets A in the register Command (step S1914).

  If the determination in step S1907 is YES, it is determined whether or not the pattern matches Type F in FIG. 15 (step S1915). If this determination is YES, as described above with reference to FIG. The sound source 109 in FIG. 1 is instructed to generate a sound that recognizes “Command B” corresponding to the mark “◯” in FIG. In addition, the CPU 106 sets B in the register Command (step S1917).

  If the determination in step S1915 is YES, it is determined whether or not the value of the register Command is A (step S1918).

  If the determination in step S1918 is YES, as described above with reference to FIG. 13, the CPU 106 recognizes the sound that has recognized the values 0 to 9 of the timbre change upper digits following “Command A” corresponding to the ■ mark in FIG. Is instructed to the sound source 109 of FIG. 1 (step S1919). Further, the CPU 106 sets a “value” corresponding to any of the types 0 to 9 determined in step S1911 in the register tone upper digit (step S1920).

  If the determination in step S1918 is NO, as described above with reference to FIG. 13, the CPU 106 recognizes the sound 0 to 9 in the timbre change lower digit value following “Command B” corresponding to the □ mark in FIG. Is instructed to the sound source 109 of FIG. 1 (step S1921). Further, the CPU 106 sets a “value” corresponding to any of the types 0 to 9 determined in step S1911 in the register tone color lower digits (step S1922).

  Since the upper and lower digits of the timbre number have been determined up to step S1922, the CPU 106 instructs the sound source 109 of FIG. 1 to change the timbre to the timbre number determined by the values of the register timbre upper digit and the register timbre upper digit. (Step S1923).

  After the processing in step S1914, S1917, S1920, or S1923, the CPU 106 resets each value of the registers Bress_on_off [0] to Bress_on_off [7] (see FIG. 14) to off (step S1924).

  Thereafter, the CPU 106 returns from the interrupt process every 50 μs illustrated in the flowcharts of FIGS. 18 and 19 to the main process illustrated in the flowchart of FIG. 17.

  As described above, according to this embodiment, it is possible to provide an electronic wind instrument that can switch states such as timbre switching with a simple operation and a simple circuit configuration.

  In the present embodiment, switching of timbres is described as an example. However, the present invention can be applied not only to timbres but also to function switching of musical tone parameters having real-time characteristics such as a pitch bend range.

  Moreover, although this embodiment demonstrated the example applied to the electronic wind instrument, if it is an electronic musical instrument of the type which always uses both hands, it is also possible to apply other than an electronic wind instrument.

  As an example of Peak detection, the method described with reference to FIGS. 3 and 4 has been described as an example, but various methods can be adopted as a method of Peak detection.

  In the present embodiment, the breath input is performed by using Tempo having a fixed time length, but the present invention can be applied to applications such as switching Tempo by the breath itself.

Regarding the above embodiment, the following additional notes are disclosed.
(Appendix 1)
A sensor for detecting a performance operation;
In response to detection of the performance operation by the sensor, sound generation instruction means for instructing the sound source to generate sound;
Identification means for identifying a pattern of the performance operation based on the number and timing of the performance operation detected by the sensor within a predetermined time;
Control means for controlling parameters of a musical tone to be generated in correspondence with the pattern of the performance operation identified by the identification means;
Electronic musical instrument with
(Appendix 2)
The electronic musical instrument further includes mode setting means for setting a predetermined specific mode,
The electronic musical instrument according to appendix 1, wherein the operation of the identification unit and the control unit is validated only when the specific mode is set by the mode setting unit.
(Appendix 3)
The electronic musical instrument generates a first guide sound at the predetermined timing and sets a second guide at the predetermined time interval when a specific mode is set by the mode setting means. The electronic musical instrument according to attachment 2, further comprising guide sound generating means for generating sound.
(Appendix 4)
The identification means includes a memory storing a plurality of types of performance operation patterns each having a different number and timing of performance operations, and one of the plurality of performance operation patterns stored in the memory and the performance detected by the sensor. The electronic musical instrument according to any one of appendices 1 to 3, wherein the performance operation pattern is identified by determining whether or not the performance operation pattern based on the number of operations and the timing coincides.
(Appendix 5)
The identifying means corresponds to the matched performance pattern when one of the plurality of performance operation patterns stored in the memory matches a performance operation pattern based on the number and timing of performance operations detected by the sensor. The electronic musical instrument according to appendix 4, further comprising identification sound generating means for generating an identification sound to be generated.
(Appendix 6)
The electronic musical instrument according to any one of appendices 1 to 5, wherein the sensor detects presence or absence of a player's breath input as a performance operation.
(Appendix 7)
The electronic musical instrument according to any one of appendices 1 to 6, wherein the control means controls a tone color of the musical sound as the musical sound parameter.
(Appendix 8)
A parameter control method used for an electronic musical instrument having a sensor for detecting a performance operation, wherein the electronic musical instrument comprises:
In response to detection of the performance operation by the sensor, the sound source is instructed to sound,
Based on the number and timing of performance operations detected by the sensor within a predetermined time, identify the performance operation pattern,
A parameter control method for controlling a parameter of a musical tone to be generated corresponding to the identified performance operation pattern.
(Appendix 9)
In a computer used as an electronic musical instrument having a sensor for detecting a performance operation,
In response to detection of a performance operation by the sensor, instructing the sound source to produce sound;
Identifying the performance operation pattern based on the number and timing of performance operations detected by the sensor within a predetermined time; and
Corresponding to the identified performance operation pattern, controlling parameters of a musical tone to be generated;
A program that executes

101 LPF (low pass filter)
102, 104 Amplifier (Amp)
103 Zero Cross Detection Unit 105 Absolute Value Calculation Unit 106 CPU
107 Key matrix 108 Mode SW (switch)
109 Sound source 110 D / A converter 111 Amplifier 112 Speaker (SP)
113 Code / Interrupt Circuit 114 A / D Converter 115 Timer 116 Memory 302 Prediction Curve

Claims (9)

A sensor for detecting a performance operation;
In response to detection of the performance operation by the sensor, sound generation instruction means for instructing the sound source to generate sound;
Identification means for identifying a pattern of the performance operation based on the number and timing of the performance operation detected by the sensor within a predetermined time;
Control means for controlling parameters of a musical tone to be generated in correspondence with the pattern of the performance operation identified by the identification means;
Electronic musical instrument with The electronic musical instrument further includes mode setting means for setting a predetermined specific mode,
2. The electronic musical instrument according to claim 1, wherein the operation of the identification unit and the control unit is made effective only when the specific mode is set by the mode setting unit.   The electronic musical instrument generates a first guide sound at the predetermined timing and sets a second guide at the predetermined time interval when a specific mode is set by the mode setting means. The electronic musical instrument according to claim 2, further comprising guide sound generating means for generating sound.   The identification means includes a memory storing a plurality of types of performance operation patterns each having a different number and timing of performance operations, and one of the plurality of performance operation patterns stored in the memory and the performance detected by the sensor. The electronic musical instrument according to any one of claims 1 to 3, wherein the performance operation pattern is identified by determining whether or not the performance operation pattern based on the number of operations and the timing matches.   The identifying means corresponds to the matched performance pattern when one of the plurality of performance operation patterns stored in the memory matches a performance operation pattern based on the number and timing of performance operations detected by the sensor. The electronic musical instrument according to claim 4, further comprising identification sound generating means for generating an identification sound to be generated.   The electronic musical instrument according to claim 1, wherein the sensor detects presence or absence of a breath input by a performer as a performance operation.   The electronic musical instrument according to claim 1, wherein the control unit controls a tone color of the musical tone as the musical tone parameter. A parameter control method used for an electronic musical instrument having a sensor for detecting a performance operation, wherein the electronic musical instrument comprises:
In response to detection of the performance operation by the sensor, the sound source is instructed to sound,
Based on the number and timing of performance operations detected by the sensor within a predetermined time, identify the performance operation pattern,
A parameter control method for controlling a parameter of a musical tone to be generated corresponding to the identified performance operation pattern. In a computer used as an electronic musical instrument having a sensor for detecting a performance operation,
In response to detection of a performance operation by the sensor, instructing the sound source to produce sound;
Identifying the performance operation pattern based on the number and timing of performance operations detected by the sensor within a predetermined time; and
Corresponding to the identified performance operation pattern, controlling parameters of a musical tone to be generated;
A program that executes