AudioInput File Frequency Reader

import beads.*;
import org.jaudiolibs.beads.*;
import java.util.Arrays;
import java.io.*;
import java.net.URL;
import javax.sound.sampled.*;
import java.io.File;
AudioContext ac;
Frequency f;
PowerSpectrum ps;
Glide fGlide;
float averageFrequency = 400.0;
void setup() {
frameRate(200);
size(600,600);
ac = new AudioContext();
File inputFile = new File("/Users/johnwaldo/Downloads/2-11 Stop.wav");
Noise n = new Noise(ac);
String audioFileName = inputFile.getAbsolutePath();
SamplePlayer player = new SamplePlayer(ac, SampleManager.sample(audioFileName));
Gain g = new Gain(ac, 2,2);
g.addInput(player);
ac.out.addInput(g);
ShortFrameSegmenter sfs = new ShortFrameSegmenter(ac);
sfs.addInput(ac.out);
FFT fft = new FFT();
sfs.addListener(fft);
ps = new PowerSpectrum();
fft.addListener(ps);
ac.out.addDependent(sfs);
ac.start();
}

color fore = color(255, 102, 204);
color c = color(140, 200, 90);
color back = color(0,0,0);

void draw() {
  background(back);
  stroke(fore);
  if(ps == null) return;
  float[] features = ps.getFeatures();
  if(features != null) {
    //scan across the pixels
    for(int i = 0; i < width; i++) {
      int featureIndex = i * features.length / width;
      int vOffset = height - 1 - Math.min((int)(features[featureIndex] * height), height - 1);
      line(i,height,i,vOffset);
    }
  }
}