Part way through a match my sound keeps randomly changing, it suddenly just switches to something that sounds a bit like War Tapes (it's not actual War Tapes but sounds similar). Then after a random amount of time it just switches back to normal??!!
I don't know if this is a BF problem or a problem with my setup but none of my setup settings have changed are are very unlikely to change mid game while I'm not even in Windows.
I use a Sound blaster sound card and decent stereo headphones and my sound card software is always set to the Neutral sound profile. And all my windows sound settings look fine (Audio enhancements off). It's like something is changing the sound profile temporarily, it sounds a bit like when your ears pop or need to pop, it's just a weird change.