[alsa-devel] wrong decibel data?

Nicolo' Chieffo nicolo.chieffo at gmail.com
Sat Apr 3 12:48:33 CEST 2010

I don't think that any specific debug is needed. pulseaudio developers
just told that you have to declare -200 dB when the sound is disabled,
that's it.
Is this a difficult thing to do? which files must be touched?

On Sat, Apr 3, 2010 at 12:09 PM, Colin Guthrie <gmane at colin.guthr.ie> wrote:
> 'Twas brillig, and Nicolo' Chieffo at 02/04/10 21:25 did gyre and gimble:
>> I just had a discussion with pulseaudio developers in which they told
>> me that if the speakers don't emit any audio when the ALSA volume is
>> 0%, then the correct gain value should be -inf dB (a value lower than
>> -200 for pulseaudio means mute). Unfortunately my card has -48 dB.
>> They also said that if with -47.25 dB (which is what I get with ALSA
>> volume set to 2%) I can hear audio even if it's very very low, at -48
>> dB I should still be able to hear something (the scale is
>> logarithmic).
>> Their request is to change to -200 the gain reported from my card
>> driver when the ALSA volume is set to 0%.
>> Thanks
> FWIW, I've got the same/similar h/w with a cutoff at 14% in PA as you
> have. I've been meaning to get this fixed for a while, but I'm
> incredibly lazy with certain things that don't bother me practically, so
> haven't followed it up yet.
> Thanks for getting the ball rolling :)
> If any specific debug is needed here, feel free to ask.
> Col
> --
> Colin Guthrie
> gmane(at)colin.guthr.ie
> http://colin.guthr.ie/
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