I disabled the microphone and the problem was still there. And it’s a distortion that’s actually in time with the music, so it seems like it’s the signal. To try and describe it better, I’d say the closest thing is almost a speaker with a blown cone, or one where the wire is a little loose–you can tell it’s music by the rhythm but it doesn’t sound great. Sorry if that doesn’t help. And again, it’s only with headphones. If worse comes to worse I can always turn DPS off, but I’d rather not. Thanks for your suggestions so far.