Using live audio

In the Playing audio files recipe, you've learned how to play an audio file. This recipe will teach you how to use the microphone input from your computer. This is a great feature of the Minim library and is really easy to use. You can use this as a starting point to build an art installation that responds to sound.

How to do it...

The first thing you need to do is import the minim library, declare a Minim object and an AudioInput object.

import ddf.minim.*;
import ddf.minim.signals.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
  
Minim minim;
AudioInput in;

Inside the setup() function, we'll use the getLineIn() method from the Minim class to open the default line-in, on your computer.

void setup()
{
  size( 640, 480 );
  smooth();
    
  minim = new Minim( this );
    
  in = minim.getLineIn( Minim.STEREO, 512 );
  
  background( 0 );
}

Inside the draw() function, we'll use the bufferSize() method on the AudioInput object to visualize the incoming sound. We'll...