Circular Recording in Logic 8
This is a blog post that is deffinitly here for my future reference 
What i wanted to do was record the drum Ultrabeat drum machine in logic as an audio track as opposed to midi so i could have a more dynamic drum track. As far as i know there is no out of th box feature for this in logic (if anyone knows differently please correct me) however all you need is Jack.
Jack is a little server that sits in the background and pipes audio around so you can direct audio inputs and outputs more efficiently across your software. So download and install the latest binary and launch the program that gets installed in you Applications directory. It is essential that you start the server before launching logic.
When logic is lauched change your device to output to the new jackrouter device and go onto the ‘routing’ table in the jack gui. here you can set the output of logic to also become the input for logic so if you create a new audio track in logic you can record your output from one track to the input of anouter track. Make sure that your output from the track you are recording is not being fed back into itself otherwise you will get alot of feedback very quickly.
Obviously by using jack you can if you prefer pipe your audio into another application alltogether such as audacity or something like that.