JPH01101588A - Electronic wind instrument - Google Patents

Abstract

PURPOSE: To obtain a suitable wind response characteristic and to generate a playing sound intended by a player by detecting the output signal level of a press sensor means after the lapse of prescribed time when the output signal level exceeds a prescribed level and obtaining initial data. CONSTITUTION: The electronic musical instrument is provided with an initial data generating means 6 including a counting means for starting counting when an output signal from the press sensor means 1a exceeds the prescribed level, and after counting prescribed time, instructing the end of counting and capable of detecting the output signal level of the means 1a by the counting means and obtaining initial data. Musical sound parameters are controlled based upon the initial data obtained from the means 6. Consequently the electronic wind instrument capable of executing performance intended by a player, especially detecting the initial data as suitable data and controlling outputted musical sounds can be obtained.

Description

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

[Background 1] Some conventional electronic musical instruments equipped with a breath sensor have a function of varying musical sound parameters such as the volume of the generated musical sound according to the strength of the blow.
We are proposing such an electronic musical instrument (Jitsugan 1986-
120958 etc.).

By the way, in the conventional proposed technology, when the output from the breath sensor exceeds a certain level (threshold level), a sound generation instruction is issued to the sound source device, and the output level of the breath sensor at that time is used as initial data. It is designed to control the volume of the output sound.

However, the press output of the performer does not rise suddenly due to the characteristics of the sensor, and the output of the breath sensor at the timing when it exceeds the predetermined threshold level as described above is the result of the player's blowing. It means that the power is not properly expressed. Moreover, this conventional technique also has the problem that it reacts to even the slightest noise caused by breathing or the like, resulting in the player's output being contrary to the player's wishes.

[Object of the Invention] The present invention has been made in view of the above points, and is an electronic device that can perform the performance as intended by the performer, and in particular can detect initial data as appropriate and control output musical tones. The purpose is to provide wind instruments.

[Summary of the Invention] That is, in order to achieve such a goal, the present invention starts counting when the output signal from the breath sensor means exceeds a predetermined level, and after counting for a predetermined time, a counting means for instructing the end of counting; an initial data generating means for detecting the output signal level of the breath sensor means at the time when the counting means is instructed to end the counting; and an initial data generating means for obtaining initial data; The key point is that the apparatus includes a control means for controlling musical tone parameters in accordance with initial data obtained from the means.

[Example] An embodiment of the present invention will be described in detail below with reference to one drawing.

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 1f, 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 by the same applicant can be used.

The output voltage signal of this breath sensor la is A/
After being converted into a digital signal by the D converter 2, the CPU 3
given to. The CPU 3 is composed of a microprocessor and controls the overall circuit operation of the electronic wind instrument.

The CPU 3 is also provided 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 timbre 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.

With this initial data conversion table, the contents of the table are set so as to linearly change the initial data with respect to the breath strength 4. Of course, a special performance effect may be obtained by causing a non-linear change, and for simplicity, the output of the A/D converter 2 itself may be used as initial data.

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.

In addition to the audio system 8 that includes a musical tone generation circuit 7, an amplifier, and speakers installed inside the main body of the electronic wind instrument, these sound sources are provided separately, and an input section (including the press sensor 1a, CPU 3, etc. )
The electronic wind instrument may be configured as a single system by electrically connecting with the electronic wind instrument.

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

FIG. 4 is a flowchart that operates at predetermined time intervals, and may be activated by timer interaction if necessary.
The appropriate feeling (the time is shown discretely in FIG. 2, but this is the feeling) is 0.1 intestine 116C to several layers sec.

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 determined whether the key-on flag is 1 or not.

Assuming that it has now been initialized, the answer is No, and the process proceeds to step S3, where it is determined whether the timer flag is 1 or not. In this case as well, the answer is NO, and then in step 54,
It is detected whether the content of the ADIN buffer exceeds the threshold level IO for starting sound generation (see FIG. 3).

Here, if it is less than 10, it is 1. Assuming that there is no press input, the process returns to the main routine (not shown). However, if lO is exceeded as at time 1 in FIG. 3, the process proceeds from step S4 to step S5.

In this step S5, the above-mentioned timer flag 1 is set, 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, step 31-
Execute 33. Then, in step S3, a determination of YES is made this time, and the process proceeds to step S6.
Now, it is determined whether the count value of the above-mentioned counter is 5 or not. Since the current count is 1, the result is NO and 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 5l-32→S3→S6→S7 are repeated, and when the counter value reaches 5, step S6
The process then proceeds to step S8.

In step S8, the output of the A/D converter 2 at that time,
That is, the initial data conversion table 6 is accessed based on the value of the ADIN buffer. In the example in Figure 3, A
Since the content of the DIN buffer is 120, 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 Fig. 3, the answer is No, but in the case of an unexpected input by the performer due to noise etc., the press output changes as shown by the dotted line in Fig. 3, and in that case, the judgment is YES in step S9. In the following step 310, both the timer flag and the count value of the counter are set to 0 for initial setting.

Now, in this case, the process advances from step S9 to step S11, and the CPU 3 detects the operation of the pitch switch 4,
Obtain scale information (of course, it is desirable to obtain it before the processing in step 511 from the viewpoint of responsiveness of the press), together with the above initial data and after-data that is expressed by the A/D converter 2 output itself. The musical tone generating circuit 7 is instructed to generate a corresponding musical tone.

Then, in step 312, 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 (with the timbre S changed if necessary), and the performer receives the musical tone signal from the audio system 8. You will be able to get it.

After that, the process proceeds to steps S1→S2→313 at each time, and it is judged whether the content of the ADIN buffer has become below the value of 5, which is the muting level.

If NO, the process advances from step 313 to step S14, where A is used to vary the volume (if necessary, effects such as timbre and vibrato) according to the press output level at that time.
The data in the DIN buffer is sent to the musical tone generation circuit 7 as after data.

After that, 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.

After that, it continues to be generated as a musical tone with a volume and tone that changes depending on the after data. For example, if you want to generate a piano-like sound, there is no need to obtain after-data and change the tone parameters after the sound starts.If the system is simple, you do not need to consider after-data. However, if a high-grade system is to be constructed, a conversion table for obtaining after-sales data may be provided in the same way as the initial data conversion table 6 for obtaining initial data.

When it is detected in step 313 that the output of the A/D converter 2 has decreased to the mute level, 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. Then, step 51
At step 6, the key-on flag is set to 0, and at step 317, 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 that matches the player's press input can be obtained, and furthermore, it is possible to prevent musical tones from being erroneously generated due to noise caused by breathing or the like.

Furthermore, the initial data conversion table 6 allows the relationship between breath strength and 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 multiple types may be provided and used selectively according to tone selection, etc. It can be of various types, such as a clarinet type or a clarinet type.

[Effects of the Invention] As explained above, according to the present invention, after a predetermined period of time has elapsed after the output signal level of the press sensor means exceeds a predetermined level, the output signal level of the press sensor means at that point in time is detected. Since the initial data is obtained using the same method, it is possible to obtain suitable wind response characteristics and to generate the performance sound intended by the performer.

[Brief explanation of the drawing]

The drawings show one 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 a diagram showing the output state of the press sensor. The figure shown in FIG. 4 is a flowchart for explaining the operation of this embodiment. la...Breath sensor, 3...CPU
, 6... Initial data conversion table, 7.
...Musical sound generation circuit. Patent Applicant Casio Computer Co., Ltd. Figure 1 e Figure 3) Ran Figure 2 Initiation ~ Lua Itta Replacement Tagle

Claims (2)

[Claims] (1) In an electronic wind instrument having a wind response function, a breath sensor means is provided in the wind performance input section and detects the player's wind performance input, and when the output signal from this breath sensor means exceeds a predetermined level. a counting means that starts counting and instructs to end the counting after counting for a predetermined time; and a counting means that detects the output signal level of the breath sensor means at the time when the counting means is instructed to end the counting; An electronic wind instrument comprising: initial data generation means for obtaining initial data; and control means for controlling musical tone parameters in accordance with the initial data obtained from the initial data generation means. (2) The electronic wind instrument reprinted in claim 1, wherein the initial data generation means includes conversion table means for converting the output signal from the breath sensor means into the initial data.