A440 - A Core Audio "Hello World"

iPad Dev Camp Chicago is coming up this weekend, and I’m going to be giving two talks about Core Audio. One of the applications we are going to go over is called A440, a “Hello World” of Core Audio. It plays a simple a 440 Hz tone using both Audio Queue Services (AudioQueueRef and friends) and Audio Unit Processing Graph Services (AUGraph and friends). In order to keep the code as simple as possible, it does not use any of the “Public Utility” C++ APIs.

I’ve posted the code up on BitBucket if you want to check it out before hand or are unable to attend. I also hope to have a more complex and complete audio playing application ready to release by this weekend, too. Hint, it’ll have something to do with 8-bit chiptunes. So if you’re in Chicago, sign up! It’ll be fun!