
What JJ has done with the new JJOSXL 3.xx is awesome for liive work. you guys have to RTFM and make sure all your terminology is in check.
Thirdlip, you did not look very hard sorry
http://www7a.biglobe.ne.jp/~mpc1000/os2xl/padmode.htmRTFM again
lets assume you are playing live and you want a mix of samples and midi sequences or midi messages.
Thirdlip wrote: I don't use pre-arranged sequences, but record and overdub sequences on numerous tracks live on-stage and some of them are sample-based and some are CC control of other devices.
WTF your playing over a backing track huh? not very cool if you wanna change your set up live....very borring. So IMHO I strongly suggest you learn to use the midi sequencer instead. But back to the problem. I can see three different ways to solve your problem. SETS are related to Pad Mode Assign settings. As you have noticed there is the ability to assign a midi cc or program change to a pad, but this stops acting as normal ie hit pad and it plays a sample depending on program or a midi note in midi mode.
So do you get it now?This new 'Pad Assign Mode' makes the PADs behaviour change And the best thing is i can make a track of a string of midi cc, say make a 2 bar sweep of my microkorgs filter cutoff and then make a pattern from it, assign to a pad and then when playing live i can hit that pad and WWWOSSHHH...

another pad can be assigned a midi program change, so when i hit that pad it changes microkorg patch program. And so on. Oh and this is while The MPC1000 is playing a dozen tracks of drums and vocals and playing sequences to multiple synths as well. But how can you play samples to??? RTFM (i just having a laugh with all the RTFMs

but its true)
So here is first solution - Notice the PAD BANKS. Be honest do you have every one of those 64 pads assigned to 64 samples? If you do copy a bank to a new program, so as to free up a bank. There, now you have a place for your 16 midi functions assigned the way you want. hit Pad Bank buttons and switch live
Second solution - As said before, above, you can switch sets live or turn them of or on live. Go down to Pad assign there next to the Pad number, Hit WINDOW. Hey presto you have the Pad Mode Assign List window. Go to across to [Set No.] and change your set
THird solution is same as second but use on/off function in this Pad Mode Assign List window [F2]
There you all been schooled. I hope you get it and above helps.