Re: USB audio class - kIOAudioControlUsagePassThru implementation
Re: USB audio class - kIOAudioControlUsagePassThru implementation
- Subject: Re: USB audio class - kIOAudioControlUsagePassThru implementation
- From: Daniel Mack <email@hidden>
- Date: Wed, 12 May 2010 10:00:28 +0200
On Mon, May 10, 2010 at 07:38:58PM +0200, Daniel Mack wrote:
> I'm wondering how kIOAudioControlUsagePassThru controls are supposed to
> be mapped into USB audio class compliant devices. The USB audio standard
> (v2 in my case) does not describe this kind of control selector
> specifically, so I would guess the only way is to define an extension
> unit or to use mixer elements.
>
> The AppleUSBAudioDriver seems to do other fancy things though, and I
> didn't fully get my head around yet what it really looks for in the
> descriptors. Can anyone shed some light maybe?
Any idea, anyone?
Daniel
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