I figured it out I AM AN IDIOT, I never turned my unit from internal mics to line in!!!! OMG I just did the cure show last night and the same thing happened to me. It was from me putting the unit in and out of my case and it was getting muffled. Well at least I know now and the cure show came out great because I at least kept the unit of the case for over an hour. Pretty amazing how good the built in mics are on this Sony. Oh well live and learn. Always more shows to tape coming up.
Thanks guys and sorry for wasting your time.
No time wasted here. It's a pretty steep learning curve, getting this taping stuff down. I taped a few weeks back, really excited, realised halfway through I was plugged into the mic-in rather than line-in. Gutted. You live and learn, though. I can barely listen to the first recording I made, but after a year I'm getting some I'm really proud of.
One thing I'm learning now is to leave everything the hell alone once I've started recording. Might mean the volume coming out a little low sometimes, but there are so many buttons everywhere.... all too easy to turn on the bass roll-off, or nudge volume, switch internal mic power off, etc etc.