How can I change the audio output device in Objective-C?

I'm building a simple Cocoa app and I want to direct th开发者_JS百科e audio output to a specific device, instead of the system selected one. I know some apps, like Skype, let you select where to send the output to. How do they do this?

I tried the MTCoreAudio framework but I can't even compile my app (or their AudioMonitor demo) with it included and the errors aren't helpful (_objc_fatal). Are there any complete examples that I can learn from? So far my searches haven't turned anything up.

Thanks!

The CAPlayThrough example on the Mac Dev Center Sample Code library shows how to list all of the available input and output devices, and select a default device from a menu.

Have you looked through the sample code on http://developer.apple.com ?

Look at these projects http://developer.apple.com/mac/library/navigation/index.html?section=Resource+Types&topic=Sample+Code

Namely the DefaultAudioUnit project.

I should say that working with Core Audio is more challenging than Cocoa. Most of the API's are C-based (I find that harder). You should read the Core Audio programming guide as well to get a sense of how the audio system is put together.