[wdmaudiodev] Re: Loopback capture
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 24 Mar 2014 16:22:52 +0000
Can you run DxDiag, "Save All Information", and send me the results off-list?
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of ambrish dantrey
Sent: Friday, March 21, 2014 3:27 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Loopback capture
Got it. It is a bug in Microsoft API:
http://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/c7ba0a04-46ce-43ff-ad15-ce8932c00171/loopback-recording-causes-digital-stuttering?forum=windowspro-audiodevelopment
Is there a KB article on it? This should atleast be mentioned on MSDN page for
loopback recording.
Thanks,
Ambrish
On Fri, Mar 21, 2014 at 6:19 PM, ambrish dantrey
<a4ambrish@xxxxxxxxx<mailto:a4ambrish@xxxxxxxxx>> wrote:
Adding a subject
On Fri, Mar 21, 2014 at 6:18 PM, ambrish dantrey
<a4ambrish@xxxxxxxxx<mailto:a4ambrish@xxxxxxxxx>> wrote:
I am running into some very strange issue with loopback capture
1) Open a loopback capture stream on default audio endpoint (headphones)
2) Play audio using WMP. This audio gets captured in loopback stream
3) Terminate audio playback using ctrl+w shortcut.
At this stage, you'll get a buzzing sound from my headphones.
This buzzing sound will go away only after I terminate loopback capture.
Does anyone have any idea on how loopback capture can affect audio going out on
the device?
I am using sample code at and modified it to not stop capture when flags are
non-zero.
http://blogs.msdn.com/b/matthew_van_eerde/archive/2008/12/16/sample-wasapi-loopback-capture-record-what-you-hear.aspx
Thanks
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