Hi all. I trained on Pro Tools but have dabbled with Logic a little in the last few years. It's been quite a while since I've done much playing or recording but I'm trying to get back into it again.

I'm having a bit of an issue with a logic project I could do with some pointers on (hope this is the right forum). I have a small project (soft drums, three guitar tracks using built in modelling and a soft synth) that has started freaking out when I try to record on the third guitar track - existing content plays back but play head is stuck and there's a loud MYEEHHHHH sound like an angry cat (meters peak, resources spike).

The project was created on a previous HDD that was starting to fail (audio recorded using internal audio), so I put it down to a disk write issue, however I've now replaced the drive (Seagate hybrid 500GB, new spec, clean install, new user) but same problem. I've also tried creating a new project and copying over the MIDI/audio, and using my recently repaired M-Box instead of internal audio, but issue still persists.

Machine is a mid-2010 2.4GHz Core 2 Duo 13" MBP with 8GB RAM, running Mountain Lion/Logic 9 Express (all SW up to date). I know it's not an optimal setup as the CPU isn't the fastest, HDD isn't ideal for recording and my M-Box is long in the tooth, but it should be fine for my needs and I've also done a quick bit of test guitar recording on the Lilly Allen demo track. No issues there so I'm wondering if there's some corruption causing the problem.

Any suggestions for troubleshooting would be appreciated. Thanks.