Cleaned up version of minim spectrum analyze example using averages

simplespectrumanalyze.pde

import ddf.minim.analysis.*;
import ddf.minim.*;

Minim minim;  
AudioPlayer jingle;
FFT fftLin;

float height3;
float height23;
float spectrumScale = 4;

PFont font;

void setup() {
  size(512, 480);
  height3 = height/3;
  height23 = 2*height/3;
  minim = new Minim(this);
  jingle = minim.loadFile("jingle.mp3", 1024);
  jingle.loop();
  fftLin = new FFT( jingle.bufferSize(), jingle.sampleRate() );
  // calculate the averages by grouping frequency bands linearly. use 30 averages.
  fftLin.linAverages( 30 );

  rectMode(CORNERS);
  font = loadFont("ArialMT-12.vlw");
}

void draw() {
  background(0);
  textFont(font);
  textSize( 18 );
  float centerFrequency = 0;
  fftLin.forward( jingle.mix );
  noStroke();

  int w = int( width/fftLin.avgSize() );
  for (int i = 0; i < fftLin.avgSize(); i++)
  {
    fill(255);
    // draw a rectangle for each average, multiply the value by spectrumScale so we can see it better
    rect(i*w, height23, i*w + w, height23 - fftLin.getAvg(i)*spectrumScale);
    //rect(x,y,w,h);
  }
  // ------------------
  // eg KICKS
  
  float kickVal = fftLin.getAvg(0)*30;
  
  if( kickVal > 128) {
    fill(255,0,0);
    println("KICK!");
  } else {
    fill(255);
  }
  ellipse(width/2, 200, kickVal,kickVal);
  
}