sample tone generator, with Griffen Tech knob (or whatever)

Griffen_Knob_sample.pde

/*
  This is a sample sketch I made to work with the Griffen Tech knob. 
  You can alter it to use any input.
  The sounds are all generated with the sine wave generator in Processing.
  Steve Lambert November 24, 2015
*/

float sineFreq = 440;
float sineFreqPast = 440; 
float sineAmp = 1;

import processing.sound.*;
SinOsc sine;

void setup() {
  size(640, 360);
  background(255);
  println("sineAmp: " + sineAmp); 
  // Create the sine oscillator.
  sine = new SinOsc(this);
  sine.play();
}

void draw() {  
    //int i = 1;
    //if (sineFreqPast == sineFreq){
      //if (sineAmp >= .1) {
      ////sineAmp = 1 - (sineAmp * .1);
      //sineAmp = sineAmp - 1;
      //sine.amp(sineAmp * .1);
      //println("bongo " + i + " sineAmp " + sineAmp);
      //}
    //} else {
    //  if (sineAmp <= 9){
    //  sineAmp = sineAmp + 1;
    //  sine.amp(sineAmp * .1);
    //  println("bingo " + i + " sineAmp " + sineAmp);
    //  }
    //}
    
    sine.freq(sineFreq);
    sine.amp(sineAmp);
    sineFreqPast = sineFreq;
    //if (sineAmp <= .9) {
    //  for (int i = 10; i > 0; i--)
    //  sine.amp(i*.1);
    //}
      
}

void mouseWheel(MouseEvent event) {
    //if (sineAmp == 0) {
    //  for (int i = 10; i < 0; i++){
    //  sineAmp = (i*.1);
    //  sine.amp(sineAmp);
    //  }
    //}
  float e = event.getCount();
  sineFreq = sineFreq + e;
  println("sineFreq: " + sineFreq + " e: " + e + " sineAmp: " + sineAmp);
  
}