To me it means the music that starts playing when you activate acceleration gate into a mission or whatever, or the combat music that starts playing when you enter an anomaly.
I dont want to hear it. You gave me an option to disable it that doesnt work. Why?
It works, have it off since inception of this feature. Sometimes settings get messed when using the log off log on again feature and/or switching chars. Try disable /enable sound with the main switch, this usually resets all sounds.