[wdmaudiodev] Re: Multiple Audio Devices
- From: "Perry, Chris" <Chris_Perry@xxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 22 Mar 2006 17:34:45 -0500
Tim,
I am presently working on multi-channel output and record capabilities
and I can successfully use multiple devices
without a problem provided I use callback events for filling or emptying
the audio buffers or threads that let other threads
execute if they are waiting on something. I think it's fundamental in
that you must let Windows messages get processed
and other threads have a chance to run for this to work. I have found
that it is often necessary to raise thread priority to
guarantee glitch-free audio.
Chris Perry
Bose Corporation
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Roberts
Sent: Wednesday, March 22, 2006 4:48 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Multiple Audio Devices
We have a (potential) client who complains that he cannot drive two
separate audio cards simultaneously from two separate processes. He
says that when one process goes foreground, audio from the other process
stops.
Before we agree to help them with this, I wanted to ask if there were
any architectural reasons for this. I rather strongly suspect it is a
coding error on their part, but I may be out of touch.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
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