KR950010018B1 - Metronome intensity control method of electronic musical instruments - Google Patents

Abstract

a) determining time selected by a player through a key scan; b) setting a time interval for performing sound generation in correspondence with the time selected and executing a counting operation after setting one-tune division value corresponding to the time selected as a tune division counter value; c) determining whether a sound generation counter value and the tune division counter value during the counting operation are set to thereby generate a strong sound on every tune division counter value set, but to generate a weak sound excepting for the tune division counter value, in generating a sound every time for the sound generation counter value; and d) determining whether or one-tune sound generation is completed by determining each counter value while decreasing the each counter value after generating the strong or weak sound, and returning to the b) step where the one-tune sound generation is completed according to the determining result, to thereby execute the sound generation for the next tune

Description

How to adjust the metronome sound of electronic instruments

1 is a block diagram of an electronic musical instrument equipped with a metronome sound strong and weak adjustment device of the present invention.

2 is a flowchart showing a method for adjusting the metronome sound intensity and weakness of the electronic musical instrument of the present invention.

* Explanation of symbols for main parts of the drawings

1: Function switch part 2: ROM

3: microcomputer 4: D / A converter

5: speaker

The present invention relates to a metronome sound strength and weakness control device and a method of controlling an electronic musical instrument that can adjust the strength and weakness of a metronome sound according to a change of beat like a real metronome (Metronome).

Electronic instruments equipped with a conventional metronome function can be distinguished without the beat and measure. There is a problem that the beginner performers can not play in time with the beat because the section is difficult to play while watching the score.

The present invention is to solve the conventional problems such that the metronome per word by the metronome provided in the electronic musical instrument is adjusted to strong, weak so that beginners can play without losing the beat when playing the instrument Its purpose is to describe the configuration and effect of the present invention by the accompanying drawings as follows.

First, as shown in FIG. 1, the electronic instrument to which the present invention is applied has a function switch unit 1 for inputting a metronome sound strong and weak control signal to the microcomputer 3, and a ROM 2 storing metronome sound data. And the microcomputer 3 for controlling the strength and weakness of the output sound and the ROM 2 storing the metronome sound data according to the selected time by decoding the function switch unit 1 and the sound data output to the microcomputer 3. It is composed of a D / A converter (4) for converting the analog signal to output through the speaker (5).

As shown in FIG. 1, the metronome sound strong and weak control signals performed by the apparatus of the present invention configured as described above are selected by the function switch unit 1 so that the microcomputer 3 can be controlled. Is entered.

The microcomputer (3) is the shortest note When the timer interrupt is generated, the quarter note (♩) must generate the timer interrupt 24 times, and the eighth note (♪) becomes the length of each note when the timer interrupt occurs 12 times.

Therefore, in the case of 3/8 beats, the metronome sound is generated whenever the timer interrupt is generated 12 times. If the timer interrupt is generated 36 times in total, one metronome sound is generated.

Also, in the case of 4/4 time, the metronome sound is generated whenever the timer interrupt occurs 24 times. Therefore, if the timer interrupt occurs 96 times in total, one metronome sound is generated.

Therefore, the microcomputer 3 decodes the metronome sound strong and weak signals output from the function switch unit 1, and reads the metronome sound data stored in the ROM 2 at the corresponding time (timer interrupt interval). Output it.

The output metronome sound data is converted into analog signals by the D / A converter 4 and then output through the speaker 5 so as to distinguish between strong and weak so that the notes played without reading the beat during musical instrument performance are output. will be.

That is, as shown in FIG. 2, the present invention is a first step of determining the time signature selected by the performer through a key scan, and the time interval for generating the sound in response to the selected time signature as the sound generation counter value. 2nd step of counting after setting the 1-division value corresponding to the selected beat to the measure-division counter value, and determining whether the sound generation counter value and the nodal division counter value are set values during the counting operation. The counter value generates a sound every time, but each counter value is judged by decreasing each counter value after the third process, strong or weak sound, which generates a strong sound for each set bar value, and otherwise generates a weak sound. A fourth step of determining whether or not the sound generation of the sound is completed and performing the sound generation of the next node by repeating from the second process that the sound generation of one word is completed as a result of the determination. If it made to explain in more detail as follows.

The microcomputer 3 scans the function switch 1 to determine whether the metronome switch of the function switch 1 is turned on.

If the metronome switch is turned on, it is determined whether the selected metronome beat input signal is N / 4 or N / 8 (N = 2, 3, 4, 6, 9…). Judging by the N / 4, the shortest note When the timer interrupt occurs 24 times, the sound counter is set to 24 so that the metronome sound is generated. If the N / 8 beat is determined, the sound counter is set to 12.

After that, in order to adjust the strength and weakness of the metronome, set the segment counter to N and start counting.

At this time, if the sound generation counter is the first set value (24 or 12) after the count starts, it is determined whether the measure section counter is the first set value (N). If the value is not (N), a weak sound is generated.

The shortest note (time interval) Every time the sound generation counter value is decremented, it is determined whether the sound generation counter value is "1". As a result of the judgment, if the sound generation counter value is not "1", it is judged whether the metronome switch of the function switch unit 1 is in the off state and terminates when it is off. If set to "1", the timer interrupt is reset by the first set value).

After that, it is determined whether the measure value of the measure section is “1”. If the measure measure value of the measure is “1” (one metronome sound is generated), the measure counter is set to the first set N beat so that the next measure can be distinguished. If it is not “1”, measure the counter and reduce the counter, then output the abbreviation and repeat the comparison step (= N?) Of the counter.

As described above, the present invention allows the beginner to easily play the instrument without reading the beat at the time of playing the instrument by adjusting the strength and weakness of the metronome sound according to the change of the beat like the actual metronome.

Claims (1)

The first step of judging the time signature selected by the performer through the key scan, and the time interval for performing sound generation in response to the selected time signature is set as a sound generation counter value, and the 1-division value corresponding to the selected time signature is determined. In the second process of setting the counter value and counting, it is determined whether the sound generation counter value and the node classification counter value are set values during the counting operation. In the third process of generating strong sound for each value, other than that, after counting each counter value after the strong or weak sound is generated, it is judged whether or not the sound is completed by 1 word. Metronome sound of the electronic musical instrument consisting of a fourth process of performing the sound generation of the next section repeatedly from the second process of the generation is completed, How to adjust.