[arch-general] OT: [arch-dev-public] polkit package upgrade patch

[Mauro Santos]

On 12-08-2012 17:11, Ralf Mardorf wrote:
> On Sun, 2012-08-12 at 18:02 +0200, Tom Gundersen wrote:
>> The second case, where the total gain should be <0dB, I would have
>> thought intuitively that doing this purely in software (especially on
>> very faint signals) would be less ideal than doing it in hw (you'd be
>> throwing away the resolution, wouldn't you?), but I'll admit that I
>> don't have the experience to talk about that with any authority.
> 
> It's a common misconception that keeping the level lower than 0dB would
> lead to less "resolution". It depends to the sampling rate and bit depth
> and less to the level control.
> 
> 

Sampling rate would not matter to level discussions since it limits only
the maximum frequency that can be properly sampled or reproduced.

For the same bit depth a lower playback output level will yield a lower
signal-to-noise or signal-to noise + distortion ratio, thus leading to
the same effect of having a DAC of less resolution playing at full
scale, so in a way you can say that for lower output levels you have
less resolution.

-- 
Mauro Santos