33 lines
573 B
Arduino
33 lines
573 B
Arduino
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const int button_pin = 2;
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const int sound_pin = 9;
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bool is_playing = false;
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int button_prev= LOW;
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float freq = 440;
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float midiToFreq(int midi){
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return 440.*pow(2.,(midi-69.)/12.);
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}
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void setup() {
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pinMode(button_pin,INPUT);
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pinMode(sound_pin, OUTPUT);
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}
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void loop() {
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auto button_state = digitalRead(button_pin);
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if(button_prev == LOW && button_state==HIGH){
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is_playing = !is_playing;
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freq = midiToFreq(random(65,100));
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}
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if(is_playing){
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tone(sound_pin,freq);
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}else{
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noTone(sound_pin);
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}
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delay(20);
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button_prev = button_state;
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}
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