Hello
I am currently working on a MIDI theremin project by using a HC-SR04 sensor. I have found a code online that uploads fine, but i have no MIDI output on Garageband or Ableton. I have everything connected correctly, so i am just confused on why this is not working at all.
The code that i am using is shown below ;
#include <MIDI.h>
int pingPin = 13;
int inPin = 12;
long duration;
int cm_new = 20;
int cm_old = 20;
int sens = 5; // sensivity range when to launch a new note
void setup() {
Serial.begin(31250); // MIDI Begin
pinMode(pingPin, OUTPUT); // setup the Pins
pinMode(inPin, INPUT); // setup the Pins
}
void loop()
{
// The PING is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(10);
digitalWrite(pingPin, LOW);
duration = pulseIn(inPin, HIGH); // the singal from the Sensor is measured. The length of the pulse describes the distance form an object to the sensor.
cm_new = map(constrain(duration, 20, 3000), 50, 2000, 96, 48); // contrain --> set a threshold to cut values of the sensor that are to far away of to short (20 .. 3000) MAP --> Map the sensor range to a note values vom 96 (A high C) to 48 (a low C)
if (cm_new != cm_old) // only if a new sensor value is detected, a new nite will be send. IF the object stays stable infront of the sensor, no note will be send.
{
MIDI.sendNoteOff(cm_old,0,1); // Stop the old note
MIDI.sendNoteOn(cm_new,127,1); // Send a new Note (pitch , velocity 127, on channel 1)
cm_old = cm_new;
}
delay(30); // for staiblity
}
Any help would be greatly appreciated,
Thank you 