Learning Processing: A Beginner's Guide to Programming Images ...

Sound 387
check and see if a sound is playing before you call the play( ) function. Sonia has a nice function called
isPlaying( ) which does exactly this, returning true or false. We want to play the sound if it is not already
playing, that is,
if (!dingdong.isPlaying()) {
dingdong.play();
}
Exercise 20-3: Expand the Doorbell class to animate (perhaps moving its location and
changing its size randomly) only while its sound is playing. Create an array of fi ve Doorbell
objects. Here is part of a function to add to the Doorbell class:
void jiggle() {
}
if (_________________)) {
}
x += ____________;
y += ____________;
_________________;
With Minim instead of Sonia, very little changes. Instead of a Sample object, we have an AudioPlayer
object. Th e following example includes the solutions for Exercises 20-2 and 20-3 (but uses the Minim
code, rather than Sonia). It does not implement an array, however.
Example 20-3: Doorbell with Minim
import ddf.minim.*;
Remember, “!” means not!
// A doorbell object (that will trigger the sound)
Doorbell doorbell;
void setup() {
size(200,200);
// start up Minim
Minim.start(this);
// Create a new doorbell
doorbell = new Doorbell(150,100,32, "dingdong.wav");
smooth();
}