[wdmaudiodev] Re: GFX/LFX fullduplex support.

  • From: pete c <prchan_0779@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Fri, 5 Sep 2008 12:05:27 -0700 (PDT)

just a curious is your clients AEC available for the public purchase as a 
software driver, 
id like to experiement with a commercial AEC my built in AEC that comes with my 
dell laptop doesnt seem to work very well. 

--- On Fri, 9/5/08, Tim Roberts <timr@xxxxxxxxx> wrote:

From: Tim Roberts <timr@xxxxxxxxx>
Subject: [wdmaudiodev] Re: GFX/LFX fullduplex support.
To: wdmaudiodev@xxxxxxxxxxxxx
Date: Friday, September 5, 2008, 12:10 PM

pete c wrote: 

ive been experiementing with a GFX-render and an LFX-capture APO framework, 
they run smoothly with not much going on in the Vista OS background; however 
once other apps/services begin running simultaneously the GFX/LFX drift is much 
more drastic almost as if higher priority tasks in Vista are prempting the 
GFX-render process; and the LFX-capture begins to overrun the GFX-render side 
which is not good for AEC. Is there anyway to set kernel priorities to the 
GFX/LFX processes (like in an RTOS) or does this depend on the parent Audio 
Graph process priority level?
The audio graph runs in a separate system process, and already runs at a raised 
priority.  Besides, you should know that raising the priority won't solve the 
problem.  It just delays it.

You need to be able to handle this skew.

How are you sending the data from the render end back to the capture end?
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.


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