Go into the options.rpy file and add somwhere after "init python:" the line "config.console = True". make shure to press the spacebar 4 times before pasting in the line, becuase using tab will rsolve in an error. Now you can open the console by pressing shift+O in the game. paste the following into the console and press enter:
for ch in [
"music", "sound", "voice", "movie",
"sound2", "sound3", "sound4",
"tavernmusic", "humambience", "cityambience", "miscambience",
"librarysound", "alchemistsound",
"moans", "moans2", "moans3", "oral",
"moviesound", "music2",
"memorysound1", "memorysound2"
]:
renpy.music.stop(channel=ch)
Now all music has stopped and will work normally.