Logic does have a good internal path. However, the program George is using to achieve that result isn't Logic. I actually didn't get the name of it. But it came with his audio interface which is an RME.

As for Audacity - I've never used it. I'm guessing their audio engine isn't very good. Which would explain why it's clipping when it hits red.

Jody Whitesides
A Funky Audio Lap Dance For Your Ears!