Introduce minim library to my code

namitap

Greeting everyone!

I got done with this sketch a while ago and wished to introduce a minim file. Any further information upon music visualisation and functions and libraries with respect to audio visualisation will help. Thanks :)

    ArrayList<PVector>allVectors;

    float wanderSpeed = 3.6;
    int numSteps = 14;

    float lineHue = 2.0;
    float lineSat = 0.0;
    float lineBright = 1.5;
    float colorTrigger = 0.982;

    boolean autoplay = true;

    void setup()
    {
      size(1600, 900);
      colorMode(HSB, 1.0, 1.0, 1.0, 1.0);
      background(0.0);
      noFill();

      createLine();
      randomizeColor();
    }

    void draw()
    {
      strokeWeight(1.01);
      //randomize color
      if (random (0, 1)>colorTrigger)randomizeColor();

      stroke(lineHue, lineSat, lineBright, 0.09);
      fill(255);

      //draw bottom line

      beginShape();
      for (int i = 0; i <allVectors.size (); i++)
      {
        PVector vector = allVectors.get(i);
        if (i == 0) curveVertex(vector.x, vector.y);
        curveVertex(vector.x, vector.y);
        if (i == allVectors.size()-1) curveVertex(vector.x,vector.y);

        vector.x +=random(-wanderSpeed, wanderSpeed);
        vector.y +=random(-wanderSpeed, wanderSpeed);
        vector.y -=0.1;

        if (i == 0) vector.x = 0;
        if (i == allVectors.size()-1) vector.x = width;
      }
      endShape();

      checkAutoplay();
    }


    void checkAutoplay()
    {
      if (autoplay)
      {
        // reset if line has left screen
        for (int i = 0; i<allVectors.size (); i++)
        {
          PVector vector = allVectors.get(i);
          if (vector.y < height) return;
        }
        // reset if boundary check didn't exit functiion
        reset();
      }
    }


    void createLine()
    {
      allVectors = new ArrayList<PVector>();

      for (int i=0; i<=numSteps; i++)
      {
        PVector vector = new PVector(i * width/numSteps, height/2);
        allVectors.add(vector);
      }
    }

    void randomizeColor()
    {
      lineHue = random(0, 1);
      lineSat = random(0, 1);
      lineBright = random(0,1);
    }

    void reset()
    {
      background(0.0);
      createLine();
      randomizeColor();
      wanderSpeed = random(0.3, 2.0);
      numSteps = (int)random(1, 20);
      colorTrigger = random(0.99, 0.9999);
    }

Chrisir

download and install the lib

http://code.compartmental.net/tools/minim/

see

http://code.compartmental.net/minim/

import ddf.minim.*;

Minim minim;

AudioPlayer groove = null;

void setup() {
  size(512, 200, P3D);
  minim = new Minim(this);
  groove = minim.loadFile("groove.mp3", 2048);
  if (groove==null) {
    println ("failed"); 
    exit();
  } else {
    groove.loop();
  } // else
}

void draw() {

  background(0);
  stroke(255);

  if (groove!=null) {
    for (int i = 0; i < groove.bufferSize () - 1; i++) {
      line(i, 50  + groove.left.get(i)*50, i+1, 50  + groove.left.get(i+1)*50);
      line(i, 150 + groove.right.get(i)*50, i+1, 150 + groove.right.get(i+1)*50);
    } // for
  } // if
}
//

namitap

Hey, Chrisir. Thanks alot! Will look upon it and get back to you. While I just thought isn't minim an existing library by default in the Processing framework?

GoToLoop

...isn't Minim an existing library by default in the Processing framework?

It certainly is! And both Processing 1 & 2 comes w/ it bundled already!
For Processing 3 we can get it from its internal library download manager instead.
Manually downloading a library should only be used as a last recourse!
I simply don't get why @Chrisir would "advise" the latter as an "answer"! @-)

Chrisir

I am not sure whether the inbuild sound is the same in all functionality as minim (if so the documentation is very shallow) - also I didn't find minim in the list of the lib manager - nvm

namitap

Hey @Chrisir, I did look into that code

    import ddf.minim.*;

    Minim minim;

    AudioPlayer tame = null;

    void setup()
    {
      size(512, 200, P3D);
      minim = new Minim(this);
      tame = minim.loadFile("tame.mp3", 2048);
      if (tame == null)
      {
        println("hailed");
        exit();
      } else
      {
        tame.loop();
      }//else
    }

    void draw()
    {
      background(255);
      stroke(0);
      if (tame != null)
      {
        for (int i = 0; i<tame.bufferSize () - 1; i++)
        {
          line(i, 50 + tame.left.get(i)*50, i+1, 50 = tame.left.get(i + 1)*50);
          line(i, 150 + tame.right.get(i)*50, i+1, 50 = tame.right.get(i + 1)*50);
        }// for
        println("value of i", i);
      }
    }

As it turns out to be, an error is displayed stating "The left - hand side of the assignment must be a variable"

Am I missing something here?

koogs

typos on lines 30 and 31. compare with chrisir's code.

namitap

Error : java.lang.NullPointer exception

when told to compile and run the sketch

:/

namitap

Hey guys, so I'm little puzzled what library I will go ahead to incorporate music visualisation. Would I go ahead with minim or FFT or both?

Chrisir

FFT is part of minim