i would say if your used to the computer arranging on a more linear overview type see everything style, its gonna be hard to switch to the mpc, but it is doable, and actually now im having quite a blast with it; but it took me awhile to adapt and im still not fully sold on editing midi notes (copying, pasting ect. )
all in all, i can work out a sketch for a beat way faster on the computer, but the mpc is just kinda fun to have a full hands on experience without just having to click buttons on a screen.
for your other question (about the audio files), im not exactly sure what your trying to say, but ill answer as best i can.
the audio tracks on an mpc (im using mpc 2500 with jjos 2xl v 2.22)
are imported from the harddrive, so you have to actually load them as a sample in your new program, then you go to the "audio file" menu, and you physically load it up to your sequence that way.
i cant remember exactly how its done, or every button push because i have only done it for 1 beat, but i do know the audio files have to be on your MPC harddrive, and then loaded up into a program or whatever; you cant stream them from a computer or something like that (if thats what you were asking)
hope some of that helps
