To get complete response
pacmd list-sinks
To get short response
pactl list short sinks
pacmd set-default-sink "SINKNAME"
pacmd set-default-source "SOURCENAME"
pacmd set-sink-volume index volume
Volume control values are
65536
- 100%0
- mute
OR, bit more intuitive way to set proper volumn can be
0x10000
- 100%0x7500
- 75%0x0
= 0%
pacmd set-source-volume index volume
Note: Changing the output sink through the command line interface can only take effect if stream target device reading is disabled. This can be done by editing the corresponding line in /etc/pulse/default.pa to:
load-module module-stream-restore restore_device=false
pulseaudio -k