// Original Version

int sensorValue;
int sensorLow = 1023;
int sensorHigh = 0;
const int ledPin = 13;

void setup() {
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
  while (millis() < 5000) {
  
    sensorValue = analogRead(A0);
    if (sensorValue > sensorHigh) {
      sensorHigh = sensorValue;
    }

    if (sensorValue < sensorLow) {
      sensorLow = sensorValue;
    }
  }

  digitalWrite(ledPin, LOW);
}

void loop() {
  sensorValue = analogRead(A0);
  int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
  tone(8, pitch, 20);

  delay(10);
}

// Potentiometer version 

int sensorValue;
int sensorLow = 1023;
int sensorHigh = 10;
const int ledPin = 13;

int const potPin = A0; // analog pin used to connect the potentiometer
int potVal;  // variable to read the value from the analog pin


void setup() {
 

  while (millis() < 5000) {
  
    sensorValue = analogRead(13);
    if (sensorValue > sensorLow) {
      sensorLow = sensorValue;
    }
    
    if (sensorValue < sensorHigh) {
      sensorHigh = sensorValue;
    }
  }
  digitalWrite(ledPin, LOW);
}

void loop() {
  potVal = analogRead(potPin); // read the value of the potentiometer
  // print out the value to the Serial Monitor
  Serial.print("potVal: ");
  Serial.print(potVal);
  sensorValue = analogRead(A0);
  int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
  tone(A0, pitch, 50);

  delay(100);
}