Re: USB audio class - kIOAudioControlUsagePassThru implementation
Re: USB audio class - kIOAudioControlUsagePassThru implementation
- Subject: Re: USB audio class - kIOAudioControlUsagePassThru implementation
- From: Brett George <email@hidden>
- Date: Thu, 20 May 2010 09:07:03 -0700
On May 12, 2010, at 1:00 AM, Daniel Mack wrote:
> 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?
I would recommend posting this to the USB group.
Brett.
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