[wdmaudiodev] Re: Mono recording from a stereo endpoint on Windows 7
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 20 Apr 2011 16:42:30 +0000
OK, so you're definitely getting a stereo pin opened. What apps are you using
to record? I ask because it may make a difference what API the app is using
(for example, there's no way to open a mono stream in WASAPI on a device that
only supports stereo.)
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Jeff Pages
Sent: Monday, April 18, 2011 4:17 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Mono recording from a stereo endpoint on Windows 7
Matthew wrote:
>What formats does your device support... in particular, in the Sound
control panel, what are the entries on the Advanced tab under "Default Format"
for your device? And which is selected?
The device supports 2-channel (stereo) recording at the usual range of sampling
rates, with 16-bit or 24-bit resolution, with the default format set to
2-channel, 24-bit, 48kHz. The same thing happens when I set the default to
16-bit.
I've also noticed the same thing with the inbuilt HD sound port on the
motherboard - when an application records in a mono format, only the left
channel is recorded, not (L+R)/2 which you'd normally expect and which happens
on XP.
Jeff
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Jeff Pages
Sent: Thursday, April 14, 2011 11:12 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Mono recording from a stereo endpoint on Windows 7
I've just noticed in Windows 7 that when an application opens a stereo capture
endpoint in mono, it only receives the left channel instead of the expected L+R
mix which happened in XP. Is this by design, and if so, is there any way of
making the audio engine do an L+R mix when recording mono?
Or do I have to create a virtual mono-mix endpoint in my driver?
Jeff
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