[alsa-devel] wrong decibel data?

[James Courtier-Dutton]

On 14 June 2010 10:54, Raymond Yau <superquad.vortex2 at gmail.com> wrote:
> 2010/6/14 James Courtier-Dutton <james.dutton at gmail.com>
>> If you use "alsamixer", dB values are shown so it is easy to find the
>> 0dB "sweet spot".
>> I think it is pulse audio that hides this information when it combines
>> two alsa mixer controls into one pulseaudio control.
>>
>
>
> The base volume seem to be the software 0dB point , (no software
> gain/atten), but the user want the hardware 0dB point (no hardware
> gain/atten if the hardware can provide hardware gain
>
> This hardware 0dB point is extremely important when you want to record using
> line in and line out

alsamixer gives the hardware 0dB point.