Using maxiPitchShift on a sample

Step 0 - Set up your sample

var audio = new maximJs.maxiAudio();

function setup() {
  audio.play = playLoop;
  audio.init();
  sound = new maximJs.maxiSample();
  audio.loadSample("assets/piano.mp3", sound);
}

function playLoop() {
  if(sound.isReady()) {
    this.output = sound.play();
  } else {
    this.output = 0;
  }
}

Step 1 - Create a pitchShift object as a global variable

var pitchShifter = new maximJs.maxiPitchShift();

Step 2 - Create a conditional which only happens once, in the play loop

In this conditional, we will set the sample of our pitchShifter object. We will use boolean logic to ensure this is only triggered once.

// GLOBAL
var samplePlayerSet = false;

function playLoop() {
  if(!samplePlayerSet) {
    pitchShifter.setSample(sound);
    samplePlayerSet = true;
  }

  if(sound.isReady()) {
    this.output = sound.play();  
  } else {
    this.output = 0;
  }
}

Step 3 - Play the pitchShifter object

function playLoop() {
  if(!samplePlayerSet) {
    pitchShifter.setSample(sound);
    samplePlayerSet = true;
  }

  if(sound.isReady()) {
    this.output = pitchShifter.play(0.5, 0.1, 2, 0);  
  } else {
    this.output = 0;
  }
}

The value underlined is the only one which matters for a basic pitch shift. It sets the pitch relative to the usual pitch of the sample, where 1 is normal, 0.5 is half and 2 is double.