Added in 1.9.0
/vol -mpuNvw [volume]
Sets the volume on your system for waves, midis, and mp3s (same as waves)
-m - Midi.
-p - Mp3.
-uN - Sets mute setting; 1 = on, 2 = off.
-v - Mp3 (Should be master TODO)
-w - Wave.
[volume] - Volume. (0 to 65535)
;Turn on mute /vol -vu1