Are there any shortcuts for the volume command?

Yes, you can use ";loudness" as a shorthand.

What rank do I need to use the volume command?

You need the Admin rank or higher in HD Admin to use this command.

Type ;volume [Volume] in the chat while playing a game with HD Admin installed.

No, this command only works in games that have the HD Admin plugin installed by the game developer.

HD Admin Admin

The volume command changes the volume the current song is played back at.

This command changes the volume the current song is played back at.

;volume [Volume]

Example: ;volume 2

This command changes the volume the current song is played back at. Run this command from the in-game chat by typing ;volume.