14 Apr
2008
14 Apr
'08
7:17 p.m.
On Mon, Apr 14, 2008 at 5:15 PM, James Courtier-Dutton
<James(a)superbug.co.uk> wrote:
Hi,
Is there a recognized method for calibrating a sound card?
e.g.
For Playback, one sends a sample .wav PCM file to the sound card, then
measure the analog output from the line-out.
If the sound card itself provides 0dB of Gain, what should be the
measured figure?
Can this be done with a simple AC volt meter?
There seems to be some debate, with regards to ALSA, as to whether the
line-out is at the correct level if one sets all the ALSA mixer controls
to 0dB.
Wouldn't this require developer access to every single device we
support? With HDA intel this would mean every make and model of
laptop and motherboard on the market.
Lee