[alsa-devel] wrong decibel data?

James Courtier-Dutton james.dutton at gmail.com
Mon Jun 14 10:56:15 CEST 2010

On 14 June 2010 09:33, Colin Guthrie <gmane at colin.guthr.ie> wrote:
> 'Twas brillig, and Raymond Yau at 14/06/10 01:25 did gyre and gimble:
>> if your sound card have ac97 codec ., you can use audacity to record the
>> output from hw:0,0 and you will see clipping occur when you set "PCM" volume
>> above 0dB
> So the standard response is "don't do that then" :)
> That's why the base volume is shown to the user via GUIs so that they
> can gauge the best point on the slider to use. Currently there is no
> indication with alsa sliders at which point the 0dB "sweet spot" lies.

What do you mean.
If you use "alsamixer", dB values are shown so it is easy to find the
0dB "sweet spot".
I think it is pulse audio that hides this information when it combines
two alsa mixer controls into one pulseaudio control.

More information about the Alsa-devel mailing list