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| Arduino midi octapad piezo |
MIDI octapad
Connect 8 pizzo plate to analog input pins
Use hairless-midiserial software
MidiYokeSetup
FL Studio
*/
#define LED 02
#define PIEZ_CNT 8
#define DRUM_CHANEL 8
#define ANOTHER_MUTE_PIN_
#define SHOW_
#define CRASH 0
// #define CRASHC 54
#define PIN_CRASH_STOP 9
#define OPEN_HAT 90
//#define OPENING_HAT 200
#define KANAL_HAT 1
#define KNOPKA_HAT 100
// Threshold values for detecting kicks from multiple piezoelectric sensors
int kick_threshold[PIEZ_CNT] = {200, 200, 200, 200, 200, 600, 200, 200};
// Time duration for muting kicks from each sensor
long kick_mute_time[PIEZ_CNT] = {60000, 50000, 50000, 50000, 50000, 50000, 50000, 50000};
// Musical notes corresponding to each piezoelectric sensor
byte kick_note[PIEZ_CNT] = {10, 20, 30, 40, 50, 60, 70, 80};
// Mute status for each sensor (1 for muted, 0 for unmuted)
bool mute[PIEZ_CNT] = {1, 1, 1, 1, 1, 1, 1, 1};
// Analog input pins connected to the piezoelectric sensors
const uint8_t kick_pin[PIEZ_CNT] = {A0, A1, A2, A3, A4, A5, A6, A7};
#ifdef ANOTHER_MUTE_PIN
// Additional pins for muting, if defined
const uint8_t stop_pin[PIEZ_CNT] = {A0, A1, A2, A
void noteOn(int channel, int note, int velocity) {
Serial.write( (0x90 | channel) );
Serial.write(note);
Serial.write(velocity);
}
void noteOff(int channel, int note, int velocity) {
Serial.write( (0x80 | channel) );
Serial.write(note);
Serial.write(velocity);
}
void setup() {
Serial.begin(115200);
//Serial.begin(31250);
pinMode(LED, OUTPUT);
pinMode(PIN_CRASH_STOP, INPUT);
pinMode(KNOPKA_HAT, INPUT);
digitalWrite(LED, LOW);
for (byte i = 0; i < PIEZ_CNT; i++) {
digitalWrite(kick_pin[i], LOW);
pinMode(kick_pin[i], INPUT);
#ifdef ANOTHER_MUTE
void setup() {
// Configure ADC Control Register A to set ADPS2 and clear ADPS1 and ADPS0
ADCSRA |= (1 << ADPS2);
ADCSRA &= ~((1 << ADPS1) | (1 << ADPS0));
}
void loop() {
// Check if CRASH is not muted and the CRASH_STOP pin is LOW
if (!mute[CRASH] && digitalRead(PIN_CRASH_STOP) == LOW) {
noteOn(DRUM_CHANNEL, kick_note[CRASH], 0);
}
// Decrement piez_idx or reset it to PIEZ_CNT-1
if (piez_idx > 0) {
piez_idx--;
} else {
piez_idx = PIEZ_CNT - 1;
}
// Read analog value from kick_pin[piez_idx]
int adc = analogRead(kick_pin[piez_idx]);
// Check if adc value exceeds the threshold
if (adc > kick_threshold[piez_idx]) {
if (tm[piez_idx] == 0) {
tm[piez_idx] = micros() + 2000;
kick_val[piez_idx] = 0;
digitalWrite(LED, HIGH);
tm_led = millis() + 10;
}
}
// Handle LED turning off after a delay
if (tm_led > 0 && millis() > tm_led) {
tm_led = 0;
digitalWrite(LED, LOW);
}
// Check if it's time to trigger a note
if (tm[piez_idx] > 0 && micros() > tm[piez_idx]) {
if (mute[piez_idx]) {
mute[piez_idx] = false;
velocity = 127;
if (velocity > 127) {
velocity = 127;
}
// Check if piez_idx is KANAL_HAT and the button is pressed
if (piez_idx == KANAL_HAT && digitalRead(KNOPKA_HAT) == LOW) {
// Handle special case
} else {
noteOn(DRUM_CHANNEL, kick_note[piez_idx], velocity);
}
tm[piez_idx] += kick_mute_time[piez_idx];
// Configure pin mode based on conditional compilation
#ifdef ANOTHER_MUTE_PIN
pinMode(stop_pin[piez_idx], OUTPUT);
#else
pinMode(kick_pin[piez_idx], OUTPUT);
#endif
// Handle optional serial output
#ifdef SHOW
cnt++;
velocity = kick_val[piez_idx];
Serial.print("IDX=");
Serial.print(chan);
Serial.print(" Vel=");
Serial.print(velocity);
Serial.print(" cnt=");
Serial.println(note);
#endif
}
}
// Update kick_val if adc value is greater
if (kick_val[piez_idx] < adc) {
kick_val[piez_idx] = adc;
}
// Reset tm[piez_idx] and mute[piez_idx] if it's time
if (micros() > tm[piez_idx]) {
tm[piez_idx] = 0;
mute[piez_idx] = true;
// Configure pin mode based on conditional compilation
#ifdef ANOTHER_MUTE_PIN
pinMode(stop_pin[piez_idx], INPUT);
#else
pinMode(kick_pin[piez_idx], INPUT);
#endif
}
}
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