audioshapes/src/main/java/org/example/MySketch.java

package org.example;

import ddf.minim.AudioInput;
import ddf.minim.Minim;
import ddf.minim.analysis.FFT;
import processing.core.PApplet;
import processing.core.PFont;


public class MySketch extends PApplet {


    Minim minim;
    //AudioPlayer myAudio;
    AudioInput myAudio;
    FFT aFFT;

    // Variables for FFT
    int         delFFT 	= 11;
    int         aM      = 70;
    float       amp     = 30.0f;
    float       aI     	= 0.2f;
    float       aIa  		= aI;
    float       aIStep 	= 0.35f;
    float[]     aData   = new float[delFFT];


    public void settings() {
        fullScreen();
    }
   public  void setup() {
        //fullScreen();
        background(0);

     //   textFont(mono, 14);
        smooth();
        minim   = new Minim(this);
        // myAudio = minim.loadFile("music.mp3"); // must be in data folder
        // myAudio.loop();
        myAudio = minim.getLineIn(Minim.MONO);
        aFFT = new FFT(myAudio.bufferSize(), myAudio.sampleRate());
        aFFT.linAverages(delFFT);
        aFFT.window(FFT.GAUSS);
    }

    public void draw() {
        noStroke();
        fill(0, 7);
        rect(-10, -10, width+10, height+10);
        aFFT.forward(myAudio.mix);
        aDelData();
        //println(aData);
    }

    void aDelData() {
        String b = "[ ";
        String d = "] ";

        for (int i = 0; i < delFFT; ++i) {
            stroke(255,50);
            fill(233f,123f,98f);
            float partI = (aFFT.getAvg(i) * amp) * aIa;
            float tempIndexCon = constrain(partI, 0, aM);
            rect(60 + (i*35), height - 80, 39, -partI);

            fill(255);
            text(b, 40 , height - 30);
            text(d, width - 50, height - 30);
            text( i, 60 + (i*35), height - 30);
            aData[i] = tempIndexCon;
            aIa += aIStep;
        }
        aIa = aI;
    }

    public void stop() {
        myAudio.close();
        minim.stop();
        super.stop();
    }

    public static void main(String[] passedArgs) {
        String[] appletArgs = new String[] { "MySketch" };
        MySketch ms = new MySketch();
        PApplet.runSketch(appletArgs,ms);
    }
}