Comment 12 for bug 1534929

Without pulseaudio volume level is detected correctly. (I 've changed default card in /etc/asound.conf, then ran `speaker-test -c6 -twav` and set volume in alsamixer to 3 per centages)
With pulseaudio:
1) Headset is loud, even on lowest possible volume level
2) If I set volume below 35 per centages (below -27 db) the output becomes silent immediately.
3) On some computers, there is possibility to change analog mode to digital (S/PDIF). With digital mode it becomes calmer: the loudest volume level produces low volume, it is the same as 35% of analog mode, and the lowest volume level may be still determined.

Tested with latest versions (ubuntu xenial):
Version 7.1
kernel 4.4

cat /proc/asound/card3/pcm0p/info
card: 3
device: 0
subdevice: 0
stream: PLAYBACK
id: USB Audio
name: USB Audio
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1