Here’s a tutorial and some source code I put together for loading, caching, and streaming audio from Amazon Cloudfront into Unity and Unity iPhone. It lets you keep those gi-normous backing audio files out of your core game distribution, but then persists them to your players’ local systems after the first request; it also manages iPhone playback through a native player (but controlled from your Unity script) to work around some Unity AudioSource issues on the iPhone.

Although the iPhone audio playback mechanism is native, it doesn’t require a plugin from Unity, so it ought to work with Unity iPhone Basic (although I believe plugins are expected to be available for free once 3 is out of beta). Anyway, some of that code originally came from the awesome power that is Jeff Murray at Psychic Parrot Games (http://psychicparrotgames.com/) who in turn was inspired (I think) by a tutorial from the amazing guys at Blurst (http://blurst.com).

I updated the objective-c and added a bunch of things, so obviously anything that breaks is my fault, not theirs.

Here’s a zip archive containing the source files and documentation. After you extract it, open the index.html file in the docs directory for all the details.

It’s free for any kind of use you like, commercial or otherwise, and you can make any changes to it that you desire (standard BSD license, to be specific).

MusicLoader_Unity.zip