A cool feature in Native Instruments' Kontakt 2 is DFD, which stands for Direct From Disk, another way of saying you're streaming audio off your hard drive rather than keeping all the data in RAM. DFD is great if you don't have gobs of extra RAM available, but there's one thing that you can't do when using this feature: Reversing audio playback. So backward samples aren't possible, nor are backward loops. So if you're doing a little piece of music inspired by The Beatles or maybe Jimi Hendrix, you'll want to keep it in mind. Because DFD always loads a small part of the sample's (or loop's) beginning into RAM and (at least for now) there's no way to tell it to load from the end of the audio.