The Remixing Studio
The Remixing Studio in XPro has all the features of regular Studio and StudioPro and a lot more. (See the product pages for those products for basic functionality)

XPro adds the concept of 'platters'. These are four groups of 8 tracks each, for a total of 32 Tracks you can load. This is twice the amount of DM2, and Pro. You can save any platter as a set. Load 4 different platters and use the cross-fader to move continuously from one to another.

Auto-W.A.R.P. allows you to set various patterns and control W.A.R.P auto-matically. Punch-in Record allows you to Record in real-time, and then go back over and over to make various additons or changes. You can re-record just the W.A.R.P, or any specific track.