Tocadiscos caja de ritmos

#define led 13  
#define buzzer 11
#define analogPin A0

uint16_t analogVal;

void setup () {
  pinMode (led, OUTPUT);
  pinMode (buzzer, OUTPUT);
  Serial.begin(9600);
}

void loop () {
  analogVal = analogRead(analogPin);
  analogVal -= 640;
  

  Serial.print("0, "); Serial.print("300, "); 
  Serial.println(analogVal);
  if (analogVal > 50) {
    digitalWrite(led, HIGH);
    digitalWrite(buzzer, HIGH);
  }
  else {
    digitalWrite(led, LOW);
    digitalWrite(buzzer, LOW);
  }
  delayMicroseconds(1000);
}