There was a bug in multiplayer menu with music loop... sometimes music stops for a second and starts doubling or even multiplying... I think it happens when entering that option for classes customization.
I'm not sure if it's fixed now... I'm gonna check it tomorrow.
Yup! >>
Music loop bug<< when entering multiplayer menu option "customize equipment" is still there even after patch.
Maybe Crytek didn't know about it or they're just ignoring that issue because of bigger problems right now. I understand their effort but that happens when you hurry to take the money before you finish the product!