In my experience, as mentioned above, the more you load in the more it happens. It can get to a point though that after the audio being choppy for like 5 seconds, it then stops, and the in-game sounds/music is muted for like another 5 seconds. Also interestingly enough, if you force exit the game while it's happening, the audio will still play for it's remainder even with the game closed. I even tried restarting during that time, and the audio still played during that.
edit: restarting the PC I meant, in case that was not clear