int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 2;      // select the pin for the LED
float sensorValue = 0;  // variable to store the value coming from the sensor

MIDIEvent e1 = {0x09, 0x90, 60, 64};
MIDIEvent e2 = {0x08, 0x80, 60, 0};


void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT);  
  digitalWrite(ledPin, LOW);  
  //Serial.begin(9600);
}

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);  
  // turn the ledPin on
  if(sensorValue>50)
  {
    delayMicroseconds(2000);
    //sensorValue = analogRead(sensorPin)*(4850/1023.); 
    sensorValue = analogRead(sensorPin)/8; 
    MIDIEvent e1 = {0x09, 0x90, 60, sensorValue};
    MIDIUSB.write(e1);
    //Serial.println(sensorValue);
    delay(50);
    MIDIUSB.write(e2); 
    digitalWrite(ledPin, HIGH); 
    digitalWrite(ledPin, LOW);  
  }
  // stop the program for <sensorValue> milliseconds:

}