int photo = A0;
int photoVal;

float freq_C = 261.63;
float freq_D = 293.66;
float freq_E = 329.63;
float freq_F = 349.23;
float freq_G = 392.00;
float freq_A = 440.0;
float freq_B = 493.88;

int noteDur = 500;

void setup() {
  // put your setup code here, to run once:

  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  photoVal = map(analogRead(photo), 150, 500, 0, 6);
  Serial.println(analogRead(photo));
  switch (photoVal) {
    case 0:
      tone(8, freq_C);
      break;
    case 1:
      tone(8, freq_D);
      break;
    case 2:
      tone(8, freq_E);
      break;
    case 3:
      tone(8, freq_F);
      break;
    case 4:
      tone(8, freq_G);
      break;
    case 5:
      tone(8, freq_A);
      break;
    case 6:
      tone(8, freq_B);
      break;
  }
//  tone(8, photoVal);
  delay(10);

}