After the ceremony the groom went outside to watch some Mariachis. The Groom's wireless mic was still on and he walked out of range causing alot static with intermittent Mariachi music in the L channel. I had a shotgun mic on the other channel (R). I just need to adjust the volume in certain places on the wireless mic channel (L). I have searched the internet for 2 days looking for the right answer and couldn't find it. I can't be the only person that has ever had this problem. Anyway, can anyone explain how to use key frames on the left audio channel ? Thanks!