[alsa-devel] Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII

James Courtier-Dutton james.dutton at gmail.com
Thu Feb 18 11:11:02 CET 2010

On 18 February 2010 06:15, Raymond Yau <superquad.vortex2 at gmail.com> wrote:
> VLC media player has a slider from 0% to 300% , so the user are easily to
> know  100% is the point which there is no software gain and no software
> autentation

I would have thought that VLC should have used dB for the gain.
In that case 100% == 0dB.
What would 50% be?  -6dB ?
As sound volumes are not linear, they are exponential, the dB
logarithmic scale is the best one to use.

The 0dB point is fairly easy for a user to understand.
I find it easier to understand that %

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