[alsa-devel] [BUG] Bad decibel data on C-Media USB sound card

[Allen M.]

Raymond Yau wrote:

>Does this number of steps remain the same when your starting volume are
not at 151?
>Your value 77 seem quite different from  alsamixertest

recording a sine wave with an amplitude of 1 in Audacity at step 151 shows
that the recorded
value is amplitude 0.885. Does this indicates some loss? The loopback cable
I am using
is 2 meters in length, is the resistance of the cable is too high?