Hey there... I'm about the only regular here that uses the AW4416... you'll need to track down a program called "AW extract" which can be found at download sites with a bit of googling. It's freeware.
You back your song up to CD(s) in the AW4416, then pop the CD(s) in your computer, and run AW extract and it will pull all the individual track files out and plonk them wherever you tell it to. You can then easily import them into your DAW software and edit away.
It's a very old program, and takes its time but it works just fine and is, to the best of my knowledge, the only way to get your individual track files out of the AW4416. No input device required. I should say that this only works on PC. There is no Mac version (I believe...).
Let me know if you can't find the aw extract program - I may have the original file somewhere.
Luck...