I dont know if anyone has experienced this yet, but it really bothers me. So i like to record some rough acoustic guitar tracks through garage band just using the internal mic on my MBP. It actually doesn't sound to bad normally. But when i was doing it last night for some reason, after i would record it i would listen back to it, and about 5 seconds after sounding fine the sound quality totally lowers and sounds horrible. It happens every time i record now. I have no clue what it could be. I tried looking in setting and everything i dont know if anyone else has experienced this?