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

Lennart Poettering mznyfn at 0pointer.de
Wed Feb 17 14:01:55 CET 2010

On Wed, 17.02.10 11:17, Mark Brown (broonie at opensource.wolfsonmicro.com) wrote:

> On Wed, Feb 17, 2010 at 12:56:58AM +0100, Lennart Poettering wrote:
> > Nah. I actually don't need this value for PulseAudio. In PulseAudio I
> > chose to shift all scales so that maximum amplification becomes 0 dB,
> > so that the UIs are similar to how most hifi racks do it, and which I
> Interesting.  The hifi equipment I've dealt with typically doesn't
> present any units at all in the UI outside of level monitors.

My old Yamaha hifi rack had a volume dial where the max was labeled 0
dB and the min setting was -inf dB. My new Yamaha shows the dB level
on an LCD screen whever you touch the volume dial, and it too goes
from -inf dB to 0 dB. I kinda assumed that stereos from other
manufacturers would do the exact same thing, but tbh never checked.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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