This is a sample-based audio player that uses OpenAL. A "sound bank" can have multiple samples, each covering one or more notes. This allows you to implement a full instrument with only a few samples. It's like SoundFonts but simpler.
The sounds in this demo project were taken from Fluid R3 by Frank Wen, a freely distributable SoundFont.
Requires Xcode 4.3 or better.