Re: Which file type to choose for ...
Hi Victor and Bob!
I agree that recording audio 24 bit is a no-brainer. Also, Logic's Soft synths are good no matter tha sample rate of the project.
However, there were issues with using certain apple loops in L8 @ higher sample rates than 44.1. Just be aware of this. It's easy enough to change the project sample rate and convert the files to regular aiff/wave files though.
As for the sample rate, the higher the sample rate the lower your track count. If you're using a lot of soft synths, EXS24 instruments and meaty effects then Ram becomes an important consideration. 2GB is the minimum recommended amount of ram, and I'd definitely recommend boosting this amount to at least 4GB. Bear in mind that the operating system requires ram to carry out it's functions too...
Logic 9 (in 64-bit mode in Snow Leopard) can access more than 4GB, which again, with larger Soft synths can be of real benefit.
Bob, what audio interface you are using? Check if it supports 96k and give it a shot. If you notice the difference and your Mac's CPU is not struggling then go for 88.2 or 96....
I mention 88.2 as there have been scientific-based discussions regarding what happens to the final audio when converted from higher sample rates to 44.1 and, if my memory serves me well, there was a consensus that converting from 88.2 to 44.1 gave more accurate representation than going from 96 to 44.1... something about the divisibility and algorithms used. (Too early in the morning here for me to consider this any deeper!!)
Hope that helps