Introducing the Spinner widget

Of course, with all this talk of sound FX we need some actual sound files. You can download sound FX from various free websites, and you can also buy premium sound effects as well. The sound effects for this app are supplied in the download bundle and are in the assets folder of the Chapter 17/Sound Demo folder. But you might like to make your own.

Making sound FX

There is an open source app called Bfxr that allows us to make our own sound FX. Here is a guide to making your own sound FX very fast using Bfxr. Grab a free copy from

Follow the simple instructions on the website to set it up. Try out a few of these things to make cool sound FX.


This is a seriously condensed tutorial. You can do so much with ...

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