[alsa-devel] What does 0dB refer to? (Logitech USB Speakers)

Rene Herman rene.herman at keyaccess.nl
Tue Apr 15 00:47:37 CEST 2008

On 14-04-08 19:24, Lennart Poettering wrote:

> Good joke. ALSA applies quirks an fixes in drivers all the
> time. Calling that "hiding the hardware" is stupid.

Fixes require a bug. The only bug here is in your brain.

> The dB scale is a _relative_ scale. To make any sense there needs to be

No, it is not. 0 dB is the value where no on-card amplification takes place. 
  If that seems to turn out louder from one card to the next even with the 
same equipment behind that line-out then that's unfortunate and we could fix 
it per-card defaults. What we definitely cannot do is redefine 0 dB to mean 
something else as you were suggesting for my cs4236 because you can be damn 
sure _I_ want to know the value where no onboard amplification or 
attenuation takes place. I control volume on the external amp hooked up to 
the card.


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