[wdmaudiodev] Re: USB microphone volume
- From: Larry Osterman <Larry.Osterman@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 23 Oct 2009 23:09:55 +0000
The Vista+ software volume should be attenuation only, so it shouldn't ever be
able to introduce clipping/distortion.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Yanto Suryono
Sent: Friday, October 23, 2009 3:57 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] USB microphone volume
Hi,
I have a USB audio class device that uses usbaudio.sys.
The device has an audio input with no feature unit to control the input volume.
It reports its input terminal as microphone input but actually it is a line
input.
With WinXP everything was fine since with the lack of hardware volume the
microphone volume in volume controller was greyed out.
However, with Win7, the device input, detected as microphone input now has a
volume slider, which I suspect is a software volume (since the hardware does
not support any volume setting). The problem is that the software volume
introduces a big gain that the recorded line input will be distorted with
volume set at anything above 2 (out of 100). This leaves usable volume setting
at 0 (mute) or 1 only, which is not good at all.
Does anyone have the same/similar problem?
What is the best solution for dealing with this kind of problem?
Is there any registry setting to disable this software volume (if it is) ?
Thanks
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