[alsa-devel] wrong decibel data?

Colin Guthrie gmane at colin.guthr.ie
Thu Jun 10 18:11:21 CEST 2010

'Twas brillig, and Raymond Yau at 10/06/10 04:16 did gyre and gimble:
> Can you explain how PA handle the volume controls of ac97 codec ?
> PCM -34.5dB to +*12* dB
> Master -46.5dB to 0dB
> The total dB range (PCM + MASTER) is -81dB to +*12*dB
> Most user concern about recording without distrotion. (i.e. best result when
> Capture Volume at 0dB , PCM and Master Volume at 0dB ) and they need where
> are 0dB points

I'm not 100% sure how this is handled, but I know it's not ignored.
You'll have to ask Lennart directly or dig in the code to see for sure.



Colin Guthrie

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