Comment 30 for bug 1274401

so "bass speaker playback volume" is working as expected

it is pulseaudio bug which cannot provide a bass volume control for the subwoofer similar to surround 5.1

the sound preference provide controls for 5.1 profile

1) volume
2) balance
3) bass
4) fade

but sound preference did not provide bass control for 2.1 profile

1) volume
2) bass

https://bugs.freedesktop.org/enter_bug.cgi?product=PulseAudio