pavolctrld

out  # DONE
v{sink},{vol},{db},{mute}  # volume change
f{idx}                     # default (fallback) sink change
s{idx},{name},{desc}       # sink add / first connect
x{idx}                     # sink remove

in
s56    # set the editing sink to 56
s      # set the editing sink to the default sink
v50    # set vol 50%
v+5    # inc vol 5%
v-5.2  # dec vol -5.2%
d-1.2  # dec vol 1.2dB
m0     # unmute
m1     # mute
f      # make the current sink the default (fallback) sink
f35    # make sink 35 the default (fallback) sink