soundPlayer.txt

#include <Audio.h>
float t=0;
float sinusoid=0;
int F_ROOT=440;
int F_FIFTH=660;
short magnitude=1024;
const long fileSize=32768;
const long length = 1024;

short wave[fileSize];
short buffer[length];


long ind=0;

void setup() {
 
//set AnalogWrite Resolution here to 10 bits -- future work
 Audio.begin(44100, 100);
pinMode(DAC1, OUTPUT);
pinMode(DAC0, OUTPUT);
analogWriteResolution(12);

//make the sound file for the root of chord
for(long i=0;i<fileSize;i++ /*increment t as well here based on experimentally determined looptime*/){
  wave[i] = short(.4*magnitude*sin(2*3.141592654*F_ROOT*t)+magnitude);

   
     wave[i] += short(.2*magnitude*sin(2*2*3.141592654*F_ROOT*t+70)+magnitude);
     wave[i] += short(.7*magnitude*sin(3*2*3.141592654*F_ROOT*t+25)+magnitude);
     wave[i] += short(.3*magnitude*sin(5*2*3.141592654*F_ROOT*t+500)+magnitude);

     t+=.0000226;    
}

}

void loop() {
  
  
  if(ind>=fileSize-length-1)
    ind=0;
  
  //simulates reading the buffer from a sound file
  for(int i=0; i<length; i++){
    buffer[i] = wave[ind+i];
    
    //buffer[i] += wave_THIRD[ind+i];
    //FIFTH[i] = wave_FIFTH[ind+i];
  }
  
 
  //play the sampled sine wave
  //to do: Measure this looptime
 
    int volume = 1024;
    Audio.prepare(buffer, length, volume);
    Audio.write(buffer, length);
  
  //keeps track of where in the sound file you are
  ind += length;
  
  
}
//short* makeWave(int f)
//{
// for(long i=0;i<fileSize;i++ /*increment t as well here based on experimentally determined looptime*/){
//  wave[i] = short(.4*magnitude*sin(2*3.141592654*f*t)+magnitude);
//
//   
//     wave[i] += short(.2*magnitude*sin(2*2*3.141592654*F_ROOT*t+70)+magnitude);
//     wave[i] += short(.7*magnitude*sin(3*2*3.141592654*F_ROOT*t+25)+magnitude);
//     wave[i] += short(.3*magnitude*sin(5*2*3.141592654*F_ROOT*t+500)+magnitude);
//
//     t+=.0000226;    
//     return &wave;
//} 
//}