- 3 digital pitch reference tones for tuning analog synths, generated by an Arduino nano. (pretty stable)
- 5V reference for having constant current
- 2 passive attenuators
- 1-3 multiple
The Arduino code:
void setup() {
}
void loop() {noTone(5);
tone(5, 440, 117);
delay(117);noTone(6);
tone(6, 880, 117);
delay(117);noTone(9);
tone(9, 1760, 117);
delay(117);noTone(11);
tone(9, 1760, 117);
delay(117);
}
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