I suppose I did leave out the fact that it is a USB Audio Device and that I want to find it's AudioDeviceID. AFAIK I need the AudioDevice UID in order to accomplish this. When I refer to UID below I mean an AudioDevice UID. — Dominic FeiraFounder, Static Z Software Do not post admin requests to the list. They will be ignored. Coreaudio-api mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: This email sent to email@hidden References: >Finding a hidden device kIOAudioEngineIsHiddenKey kAudioDevicePropertyIsHidden (From: dominic <email@hidden>) >Re: Finding a hidden device kIOAudioEngineIsHiddenKey kAudioDevicePropertyIsHidden (From: Brian Willoughby <email@hidden>) >Re: Finding a hidden device kIOAudioEngineIsHiddenKey kAudioDevicePropertyIsHidden (From: dominic <email@hidden>) Prev by Date: Re: Finding a hidden device kIOAudioEngineIsHiddenKey kAudioDevicePropertyIsHidden Next by Date: Re: AVAssetReader crashing under 10.8.2 Previous by thread: Re: Finding a hidden device kIOAudioEngineIsHiddenKey kAudioDevicePropertyIsHidden Next by thread: AVAudioSessionMediaServicesWereLostNotification in iOS 7? Index(es): Date Thread