Hi SteveKane,
you will have to manually set the audio you don't want to play.
Create a global variable called 'mute'
if mute = 1, stop are the music manually.
Then on start of layout if mute = 1, stop selected music.
If that doesn't work, where you have the audio. (when the player die)
PlayerHealth = 0
Mute = 0
play audio 'dead'
that would prevent the audio from playing as mute is set to 1.
Hope that works