PitchWheel

PitchWheel.pde

//import ddf.minim.spi.*;
import ddf.minim.signals.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
//import ddf.minim.ugens.*;
//import ddf.minim.effects.*;

//final int[] noteFreqs = {31,33,35,37,39,41,44,46,49,52,55,58,62,65,69,73,78,82,87,93,98,104,110,117,123,131,139,147,156,165,175,185,196,208,220,233,247,262,277,294,311,330,349,370,392,415,440,466,494,523,554,587,622,659,698,740,784,831,880,932,988,1047,1109,1175,1245,1319,1397,1480,1568,1661,1760,1865,1976,2093,2217,2349,2489,2637,2794,2960,3136,3322,3520,3729,3951,4186,4435,4699,4978};
//final String[] noteNames = {"NOTE_B0","NOTE_C1","NOTE_CS1","NOTE_D1","NOTE_DS1","NOTE_E1","NOTE_F1","NOTE_FS1","NOTE_G1","NOTE_GS1","NOTE_A1","NOTE_AS1","NOTE_B1","NOTE_C2","NOTE_CS2","NOTE_D2","NOTE_DS2","NOTE_E2","NOTE_F2","NOTE_FS2","NOTE_G2","NOTE_GS2","NOTE_A2","NOTE_AS2","NOTE_B2","NOTE_C3","NOTE_CS3","NOTE_D3","NOTE_DS3","NOTE_E3","NOTE_F3","NOTE_FS3","NOTE_G3","NOTE_GS3","NOTE_A3","NOTE_AS3","NOTE_B3","NOTE_C4","NOTE_CS4","NOTE_D4","NOTE_DS4","NOTE_E4","NOTE_F4","NOTE_FS4","NOTE_G4","NOTE_GS4","NOTE_A4","NOTE_AS4","NOTE_B4","NOTE_C5","NOTE_CS5","NOTE_D5","NOTE_DS5","NOTE_E5","NOTE_F5","NOTE_FS5","NOTE_G5","NOTE_GS5","NOTE_A5","NOTE_AS5","NOTE_B5","NOTE_C6","NOTE_CS6","NOTE_D6","NOTE_DS6","NOTE_E6","NOTE_F6","NOTE_FS6","NOTE_G6","NOTE_GS6","NOTE_A6","NOTE_AS6","NOTE_B6","NOTE_C7","NOTE_CS7","NOTE_D7","NOTE_DS7","NOTE_E7","NOTE_F7","NOTE_FS7","NOTE_G7","NOTE_GS7","NOTE_A7","NOTE_AS7","NOTE_B7","NOTE_C8","NOTE_CS8","NOTE_D8","NOTE_DS8"};
final int[] noteFreqs = {31,33,37,41,44,49,55,62,65,73,82,87,98,110,123,131,147,165,175,196,220,247,262,294,330,349,392,440,494,523,587,659,698,784,880,988,1047,1175,1319,1397,1568,1760,1976,2093,2349,2637,2794,3136,3520,3951,4186,4699};
final String[] noteNames = {"B0","C1","D1","E1","F1","G1","A1","B1","C2","D2","E2","F2","G2","A2","B2","C3","D3","E3","F3","G3","A3","B3","C4","D4","E4","F4","G4","A4","B4","C5","D5","E5","F5","G5","A5","B5","C6","D6","E6","F6","G6","A6","B6","C7","D7","E7","F7","G7","A7","B7","C8","D8"};
final String[] majorScale = {"C4","D","E","F","G","A","B","C5"};


Minim minim;
AudioInput input;
FFT fft;
pitchDetector pd;
boolean switched = false;


void setup() {
  size(300, 200);
  frameRate(18);

  minim = new Minim(this);
  input = minim.getLineIn(Minim.STEREO, 512);
  fft = new FFT(input.bufferSize(), input.sampleRate());
  pd = new pitchDetector();
  input.addEffect(pd);
}

void draw () {  
  background(0);
  fft.forward(input.mix);
  stroke(255, 0, 0, 128);

  for (int i = 0; i < fft.specSize(); i++)
  {
    line(i, height, i, height - fft.getBand(i)*4);
  }
  float p = pd.getPitch();
  float m = getMaxFFT();
  text("Freq: "+p+" "+getNote(p)+
        "\nMax: "+m+ " "+getNote(m), width/3, height/3);
}

void stop () {
  // the AudioInput you got from Minim.getLineIn()
  input.close();
  minim.stop();
  // check that this works: "You might also close an audio class during execution of your program in order to free the resources it has."
  super.stop();
}


float getMaxFFT() {
  int m = 0;
  float maxVal = 0;
  for (int i = 0; i < fft.specSize(); i++) {
    float f = fft.getBand(i);
    if (f > maxVal) {
      maxVal=f;
      m=i;
    }
  }
  return fft.indexToFreq(m);
}


String getNote (float f){
  for (int i = 0; i< noteFreqs.length -1 ; i++ ){
    if (f > noteFreqs[i] && f < noteFreqs[i+1]){
     if ( f > (noteFreqs[i] + noteFreqs[i+1])/2f) { //TODO Change to nonlinear according to B*2^(n/12)
      return noteNames[i+1];
     } else{
     return noteNames[i];
     }
    }
  }
  return ("B0");
}