Precise hertz

[DaveGuenther]

Allow floating point frequencies for tone method

[DaveGuenther]

Hi Connor,

The volume library is awesome! I forgot to include a code example of using the overloaded tone method. Here is an example that demonstrates use of both the integer and floating point tone methods:

#include "Volume.h" // Include the Volume library

Volume vol; // Audio output is plugged into pin 5 and Gnd

void setup()
{
  vol.begin(); // After calling this, delay() and delayMicroseconds will no longer work
               // correctly! Instead, use vol.delay() and vol.delayMicroseconds() for
               // the correct timing

  vol.setMasterVolume(1.00); 
  vol.delay(500);
}

bool run_song=true;
float notes[107] = {

  130.81, //C3
  138.59, //C#3/Db3
  146.83, //D3
  155.56, //D#3/Eb3
  164.81, //E3
  174.61, //F3
  185.00, //F#3/Gb3
  196.00, //G3
  207.65, //G#3/Ab3
  220.00, //A3
  233.08, //A#3/Bb3
  246.94, //B3


};

void play(float frequency){
  //This function demonstrates that vol.tone accepts 
  //floating point frequencies variables
  int v = 255;
  while (v>0){
      vol.tone(frequency, v);
      vol.delay(3);
      v-=2;
  }
}

void play(int frequency){
  //This function demonstrates that vol.tone accepts
  //integer based frequencies
  int v = 255;
  while (v>0){
      vol.tone(frequency, v);
      vol.delay(3);
      v-=2;
  }
}

void loop() {
  if (run_song){
    // Play integer based freqneucies
    for (int i=0;i<=12;i++){
      play(int(notes[i]));
      delay(500);
    }

    //play floating point frequencies
    for (int i=0;i<=12;i++){
      play(notes[i]);
      delay(500);
    }
    run_song=false;
  }
}