I was feeling a bit nostalgic and decided to play a game or two of the old Starcraft Broodwar.  I don't like in-game music much so I tried to find a way to turn off the background music.  After scouring the internet, no one had an answer.  I guessed a few things and tried CTRL S.  It turned off the sound effects but not the music.  Going off of my latest guess, I tried CTRL-M which turned the background music off.  Thought I would post this here to help some of you all with the same issue.  GL!


Turn off in-game sounds:

CTRL-S


Turn off in-game music:

CTRL-M