[wdmaudiodev] Re: GFX changing channel count?
- From: Robert Bielik <robert.bielik@xxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Tue, 26 Aug 2014 10:07:48 +0200
Hi Matthew,
Matthew van Eerde skrev 2014-08-25 17:30:
> So the input of the GFX is 2-channel, and it outputs 4-channel, which goes to
> some hardware processing below the Kernel Streaming transition, which
> eventually folds it down to 2-channel again?
Almost. The input to the "Audio device" should be stereo, then the GFX will
upmix this to 4 channels going to the sound card (i.e. 4 physical output
channels/speakers)
So, ultimately, 4 channels are provided to the driver/soundcard, but it should
look like a stereo endpoint to the user (in Sound Control panel).
Regards
/R
>
> -----Original Message-----
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Robert Bielik
> Sent: Monday, August 25, 2014 5:26 AM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] GFX changing channel count?
>
> Hi all,
>
> Is it possible to create a GFX that changes the number of channels exposed by
> the HW driver towards the audio engine ?
>
> Requirements: A speaker endpoint with stereo output, but with GFX that
> processes those 2 channels to 4 channels going to the sound hardware.
>
> Regards
> /Robert
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