tone keyboard

[johnwasser]

  boolean noButtonPressed = true;
 for(int i = 0; i < sizeof(btnVals); i++){
    Serial.println(btnVals[0]);
    if(btnVals[i] == 0) {
      tone(speaker, mel[i]);
      noButtonPressed = false;
    }
  }
  if (noButtonPressed)
    noTone(speaker);