I assume you have the USB input showing up in the "Options/Device Order" window, and the proper input selected for the track. I had understood that 32-bit is compatible with 24, and in fact I feed ADAT lightpipe at 24-bit into Adobe Audition's 32-bit, and back out again for playback, as a matter of course. I have also used the USB inputs from a Tascam US428 at 24-bit without any difficulties. I've never used a POD XT but the whole point of standards is that everything plays nice together. That makes me wonder whether it's a routing, rather than a conversion, problem. Make sure the inputs are showing up in the Windows mixer, and are not muted, and then trace the inputs through Options on the Audition toolbar. I experienced an 8-channel soundcard that wouldn't record on more than 2 tracks, which I finally traced to my having unticked the box for "Try As WDM" for the first 2 tracks, but not for the other 6! In other words, a little thought and investigation should help you find the point where the signal is disappearing. One of the challenges of the software is that there are so many places you can run afoul if you don't know exactly where everything goes. I the case I mentioned, I blamed the mixer...until I noticed that the control panel for the sound card clearly showed signal on all channels! Good luck.