playvol <sound_name> <volume>
Play a sound at a specified volume where "
sound_name" is the specified sound with the path from <sound/> and where "
volume" is between "0.0" and "1.0"
playvol "common\stuck1.wav" "0.8"
will play the sound "stuck1.wav" in the folder "sound/common/" at the volume of 0.8
Warning: If you trigger this command from a map in Hammer editor, never try to pass string parameters to a script function with this input. It will corrupt the VMF structure because of the nested quotation marks, which then must be removed manually with a text editor in order to recover your map.