21. Simple Audio

The Minim library in processing can be used to add sound to programs. Look in the processing examples from the edit menu. Then go to the Minim Library and select the example: PlayAFile. The code in this project will play a .mp3 audio fole that is contained in the data folder in your sketch folder.

Below is an extremely simple code example demonstrating how to create a sound based on whether the user’s mouse is pressed and is on the red ellipse.:

//Main project code
///you must include the sound file in a data folder inside your sketch folder

//import the Mimin library
import ddf.minim.*;

//declare minim object and AudiPlayer objects

Minim minim;
AudioPlayer sound_hit;


void setup(){
  size(300,300);
  //you must call the Minim constructor so it can find the audio file in the data folder
   minim=new Minim(this);  //pass a reference to the current 'sketch' to the constructor
   sound_hit= minim.loadFile("missile.mp3");
}

void draw(){
  background(255);
  fill(255,0,0);
  ellipse(width/2,height/2,40,40);
  if(mousePressed && mouseX < (width/2+20) && mouseX >(width/2-20) && mouseY <(height/2+20) && mouseY > (height/2-20)){
                ///rewind and play each time through the draw loop if mousePressed is true
                sound_hit.rewind();
                sound_hit.play();
        }

}

Here is a link to a zip file of the code so you can see how to create a data folder to hold your mp3 file.

https://utdallas.box.com/simpleAudio

Mimim Library Reference: http://code.compartmental.net/minim/

For Minim, you will use:

• loadFile()

For the AudioPlayer, you might use:

• loop()
• isLooping()
• play()
• isPlaying()
• pause()
• rewind()

There are lots of other methods, these are just a small sample, but they are the ones you’ll probably end up using.