sineBuffer

float t=0;
float sinusoid=0;
int F_ROOT=440;
int F_FIFTH=660;
short magnitude=256/2;
const long fileSize=65536/2;
const long length = 1024;

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


long ind=0;

void setup() {
 
//set AnalogWrite Resolution here to 10 bits -- future work

pinMode(DAC1, OUTPUT);
pinMode(DAC0, OUTPUT);

//
//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(magnitude*sin(2*3.141592654*F_ROOT*t)+magnitude);
}

}

void loop() {
  
  
  if(ind>fileSize){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
  for(int i=0; i<length; i++){
      analogWrite(DAC0,buffer[i]);
      //analogWrite(DAC1,FIFTH[i])
  }
  
  //keeps track of where in the sound file you are
  ind += length;
  
  
}