[alsa-devel] wrong decibel data?

Lennart Poettering mznyfn at 0pointer.de
Mon Jun 14 20:38:23 CEST 2010


On Mon, 14.06.10 16:45, Raymond Yau (superquad.vortex2 at gmail.com) wrote:

> The correct way is to provide the real ALSA 's 0dB point (Playback volume)
> for the user of AC97 sound card so that they can record without any
> distortion using line in with the loopback cable connected to line out.

Jeez, man, I explained that in my original reply.

If I may quote myself:

   'On top of that most volume controls should then mark the ALSA 0dB
   point as "base" volume on the slider, at what PA then calls -y dB.

   That way we will expose 0dB as maximum hw amplitude uniformly on all
   sound cards and have a special point on the slider that is hinted to be
   the "comfort" point.

   This is all explained on
   http://pulseaudio.org/wiki/WritingVolumeControlUIs#BaseVolumes'

See? It's all explained there. We still show the ALSA 0dB point on our
sliders, we just don't call it "0dB" but "base volume".

Lennart

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


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