JPH0432394B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an airflow responsive electronic musical instrument having a wind response function that generates desired musical tones in response to a player's wind performance.

[Background] In conventional electronic musical instruments equipped with breath sensors,
Some instruments have a function of varying musical tone parameters such as the volume of the generated musical tone according to the strength of the blowing. The applicant of this patent has also proposed this type of electronic wind instrument (for example, the one described in Japanese Patent Application Laid-Open No. 1-77091).

In the case of the conventional electronic wind instrument according to this proposal, when the output value of the detection signal detected by the breath sensor means exceeds a preset setting value, based on the difference value between the detection output values before and after that point, Initial response data at the time when the musical tones start to be produced is generated, and the volume at the time when the musical tones start to be produced is determined based on this initial response data.

However, in the case of such conventional electronic musical instruments, even if the blower suddenly increases the blowing force immediately after starting to play, if the response characteristics of the breath sensor are not sufficient, the sound will start to be generated at a sufficiently loud volume. As a result, there was a problem in that it was not possible to start generating musical tones at a loud volume that corresponded to the wind player's intention at the time of starting the performance.

In addition, in the case of the conventional electronic musical instrument mentioned above, when the output value of the output signal from the breath sensor exceeds a preset value, in response, it immediately instructs the sound source device to start producing sound. Therefore, when a slight noise-like breath sensor output signal occurs due to breathing, etc.,
In immediate response to this breath sensor output signal,
There was a problem in that an inconvenient situation could occur in which unnecessary musical tones were generated.

[Purpose of the Invention] This invention has been made in view of the above-mentioned conventional problems, and aims to solve the performance intention of a wind player who wants to start generating musical tones at a high volume from the moment the player starts playing. , it is possible to accurately reflect the volume at the time when the musical sound to be generated starts to be generated, and also to immediately respond to a slight noisy breath sensor output signal due to breathing, etc.
To provide an airflow responsive electronic musical instrument capable of preventing the inconvenient situation of generating unnecessary musical sounds.

The present invention also provides an airflow responsive electronic device that can set the blowing force (playing style) of the performer at the time when the player starts playing and the volume at the time when the musical tone starts to be produced in a proportional or inversely proportional relationship. The other purpose is to obtain a musical instrument.

[Summary of the Invention] In order to achieve such an object, the present invention provides an output value detection method that detects when the output value of the detection signal sequentially output from the air flow state detection means reaches a predetermined set value. When detected by the means, the output value of the detection signal detected by the air flow state detecting means is converted into corresponding response data by the response data conversion table means at a point in time when a predetermined period of time has elapsed since the detection time. The key point is that the musical tone characteristic indicating means is configured to instruct the characteristics of the musical tone to be generated in accordance with the converted response data.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the overall circuit configuration of the electronic wind instrument. 1 is the blowing input section of this electronic wind instrument, and when you blow into it through the mouse 1b, the breath sensor 1a, which is an internal wind sensor, detects the strength of your breath. The speed of the airflow is detected.

As the breath sensor 1a, for example, the one described in Japanese Patent Laid-Open No. 57-4209 filed by the same applicant can be used.

The output voltage signal of the breath sensor 1a is converted into a digital signal by the A/D converter 2, and then provided to the CPU 3. This CPU 3 consists of a microprocessor and controls the overall circuit operation of this electronic wind instrument.

The CPU 3 is also supplied with the output of a pitch switch 4 and a tone switch 5, which are comprised of a plurality of switches. That is, by selectively operating the pitch switch 4, the pitch of the output musical tone is determined, and by selectively operating the timbre switch 5, the tone color of the output musical tone is determined. Furthermore, a switch for specifying an effect or the like may be provided.

Based on the digital signal from the A/D converter 2, the CPU 3 accesses the initial data conversion table 6 to obtain initial data. An example of this initial data conversion table 6 is shown in FIG. The contents of this initial data conversion table 6 are as follows: The A/D that indicates the strength of breath starts from the point when the preset threshold level "10" is exceeded.
It is set so that as the output value of the digital signal from the converter 2 increases, the table output value increases almost linearly. That is, in the case of this embodiment, the contents of the initial data conversion table 6 are such that the magnitude of the output value of the digital signal from the A/D converter 2 indicating the strength of breath and the table output value are approximately proportional to each other. It is set so that Of course, it is not limited to this,
The contents of the initial data conversion table 6 are such that as the output value of the digital signal from the A/D converter 2 that indicates the strength of breath increases, the table output value decreases, The sound may be set to change non-linearly, such as increasing in volume from a certain point, thereby producing a special performance effect at the time the sound starts.

Then, the CPU 3 operates an internal buffer (the ADIN buffer described later is shown as an example in the figure, but is not limited to this) and an arithmetic logic circuit, and sends various control information to the musical tone generation circuit 7. , controls the generation of musical tone signals corresponding to performance operations.

The musical tone signal from the musical tone generating circuit 7 becomes an audio output in the audio system 8.

Furthermore, there is a musical tone generation circuit 7 inside the main body of the electronic wind instrument.
In addition to providing an audio system 8 including an amplifier, speaker, etc., these sound source parts are separated and electrically connected to the input part (including the breath sensor 1a, CPU 3, etc.) via a line, etc.
An electronic wind instrument may be configured as a single system.

Next, the operation of this embodiment will be explained with reference to FIG. 3, which shows the changing state of the breather, and FIG. 4, which is a flowchart.

FIG. 4 is a flowchart that operates at predetermined time intervals, and may be activated by a timer interrupt if necessary. The interval (the time is shown discretely in Figure 2, but the interval) is 0.1 msec ~
Several milliseconds is appropriate.

First, in step S1, the sensor output from the A/D converter 2 is set to the ADIN buffer in the CPU 3. Next, in step S2, it is checked whether the key-on flag is 1 or not.

If it is initialized now, NO
Proceeds to step S3, and the timer flag becomes 1.
I wonder if it's true or not. In this case as well, the determination is NO, and then in S4 it is detected whether the content of the ADIN buffer exceeds the threshold level of 10 for starting sound generation (see FIG. 3).

Here, if the number is less than 10, it is assumed that there is no breath input and the process returns to the main routine (not shown).
If the number exceeds 10 as shown in the figure, the process goes from step S4 to step S5.

In this step S5, the above-mentioned timer flag is set to 1, and the count value of the software counter inside the CPU 3 is set to 1. After that, the process returns to the main routine.

Next, at time 2 in FIG. 2, steps S1 to S3 described above are executed. Then, in step S3, a YES judgment is made this time, and the process then proceeds to step S6.
In step S6, it is checked whether the count value of the above-mentioned counter is 5 or not. Since it is now 1,
If NO, the process goes from step S6 to step S7, increments the count value by 1, and returns to the main routine.

In this way, steps S1→S2→S3→S6→S7 are repeated, and when the counter value reaches 5, the process advances from step S6 to step S8.

In step S8, the current A/D converter 2
The initial data conversion table 6 is accessed by the output of , that is, the value of the ADIN buffer.
In the example shown in Figure 3, the content of the ADIN buffer is 120, so the initial data is 124.

Then, in step S9, it is determined whether the initial data obtained as described above is 0 or not. Now, in the case of the solid line in Figure 3, the answer is NO, but
In the case of an unexpected input by the performer due to noise, etc., the breath output changes as shown by the dotted line in Figure 3. In this case, a YES judgment is made in step S9, and in the following step S10, the timer flag and counter are set for initial setting. Both count values are set to 0.

Now, in this case, the steps start from step S9.
Proceeding to S11, the CPU 3 detects the operation of the pitch switch 4 and obtains scale information (of course, this step
It is desirable to obtain this before processing S11 from the viewpoint of breath responsiveness), the above initial data,
Together with the after data expressed by the output of the A/D converter 2 itself, the musical tone generating circuit 7 is instructed to generate a corresponding musical tone.

Then, in step S12, the key-on flag is set to 1, and the timer flag is set to 0.

In this way, the musical tone generation circuit 7 starts generating a musical tone signal of the corresponding pitch at a volume that reflects the initial data (the tone color is also varied if necessary), and the performance sound is output from the audio system 8. You will be able to get it.

After that, step S1 → S2 → S13 at each time
Proceed to and check whether the contents of the ADIN buffer have fallen below the value of 5, which is the muting level.

If NO, proceed from step S13 to step S14, and adjust the volume according to the breath output level at that time (if necessary, add effects such as tone and vibrato).
The ADIN buffer data is sent as after data to the tone generation circuit 7 in order to vary the value, and then the process returns to the main routine.

Therefore, the musical tone generation circuit 7 starts generating musical tones with the volume and tone according to the initial data, and thereafter continues to generate musical tones with the volume and tone that change depending on the after data. If, for example, a piano-like sound is to be generated, there is no need to obtain after data and change the tone parameters after the sound generation starts. Also, if it is a simple system, there is no need to consider after-sales data, and if you are building a high-class system, you can use the conversion table for obtaining after-sales data as well as the initial data conversion table 6 for obtaining initial data. may be provided.

Then, in step S13, the A/
When it is detected that the output of the D converter 2 has decreased, the process proceeds to step S15, where key-off information is sent to the musical tone generation circuit 7, and the generation of the musical tone is stopped.
After that, the key-on flag is set to 0 in step S16.
Then, in step S17, the after data is set to 0 and an instruction is given to the musical tone generation circuit 7.

As a result, the musical tone is muted and the entire system is initialized.

As described above, according to this embodiment, a response characteristic matching the breath input of the performer can be obtained, and furthermore, it is possible to prevent musical tones from being erroneously generated due to noise caused by breath or the like.

Furthermore, the initial data conversion table 6 allows the relationship between the breath strength and the initial data to be appropriate (for example, having linear responsiveness).

In the above embodiment, only one type of initial data conversion table 6 is provided, but a plurality of types may be provided and used selectively according to tone color selection, etc.

Further, the shape of the wind instrument can be various, such as a saxophone type or a clarinet type.

[Effects of the Invention] As explained above, according to the present invention, the output value detection means can detect that the output values of the detection signals sequentially output from the air flow state detection means have reached a predetermined set value. When detected, at the time when a predetermined period of time has passed from the detection point,
The output value of the detection signal detected by the airflow state detection means is converted into corresponding response data by the response data conversion table means and outputted, and the output value is generated according to the converted response data. Since the characteristics of the musical tone to be played are indicated by the musical tone characteristic indicating means, for example, the performance intention of the blow player at the time of starting the blowing (the intention to generate the musical tone at a high volume from the time of starting the blowing) can be determined by It is possible to accurately reflect the characteristics of the musical sound (for example, the volume) at the time when the sound starts to be generated, and also to immediately respond to the slight noise-like breath sensor output signal caused by breathing, etc., and to generate unnecessary musical sounds. In addition to being able to prevent the inconvenient situation of storage, the output value detection means can also detect that the output values of the detection signals sequentially output from the air flow state detection means have reached a predetermined set value. When detected, the output value of the detection signal detected by the airflow state detection means is converted into corresponding response data by the response data conversion table means at a point in time when a predetermined time has elapsed from the detection time. According to the converted response data, the characteristic of the musical tone to be generated is instructed by the musical tone characteristic indicating means. ) can be set in a proportional or inversely proportional relationship to the volume of the sound at the time the musical tone begins to be produced. The effect is that musical tones can be started to be generated at a volume that is small or inversely proportional to the volume.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an overall circuit configuration diagram, FIG. 2 is a diagram showing the contents of the initial data conversion table 6 in FIG. 1, and FIG. 3 is an output state of the breath sensor. FIG. 4 is a flowchart for explaining the operation of this embodiment. 1a... Breath sensor, 3... CPU, 6...
Initial data conversion table, 7... musical tone generation circuit.

Claims (1)

[Claims] 1. Air flow state detection means that sequentially detects the state of the air fluid and sequentially outputs corresponding detection signals; output value detection means for detecting that the output value of the detection signal has reached the set value; At the point in time that has passed,
response data conversion table means for converting the output value of the detection signal detected from the air flow state detection means into corresponding response data and sequentially outputting the response data; Accordingly, an airflow responsive electronic musical instrument is provided, comprising: musical tone characteristic indicating means for indicating the characteristic of musical tone to be generated. 2. Claim 1, wherein the musical tone characteristic instructing means instructs at least one characteristic of the volume or timbre of the musical tone to be generated in accordance with the response data converted by the response data conversion table means. The airflow responsive electronic musical instrument described above. 3. The air flow state detection means includes fluid detection sensor means that sequentially detects the state of the air fluid and sequentially outputs corresponding analog electrical signals, and sequentially detects the analog electrical signals sequentially output from the fluid detection sensor means. , convert it into a corresponding digital signal,
2. The airflow responsive electronic musical instrument according to claim 1, further comprising analog/digital conversion means for sequentially outputting said detection signals. 4. The air flow responsive electronic musical instrument according to claim 1, wherein the air flow state detection means comprises fluid pressure detection means that sequentially detects the fluid pressure state of the air fluid and sequentially outputs detection signals corresponding thereto. .