REX files are pre-sliced loops, with MIDI files that play them back EXACTLY as they were recorded, except, of course, you can change the tempo with no artifacts...

It has occurred to me that most of the so-called 'Live' loops that Ketron's and others use are essentially the same thing. So if you create a style that uses these MIDI files as triggers for the loop slices, and these get imported either to a laptop sampler, or even the internal sampler of your arranger (if it has one), your arranger will now do 'live' loops even without the capability built in.

Especially for the dance crowd (but also smooth jazz, acid jazz, and even straight-ahead - there are loops in just about ANY format!) this seems a fairly simple way to add 'live' loop capability.

The only caveat is that the MIDI files to trigger the loops MUST be on a non-transposing arranger track (or all hell breaks loose!). So this is one more reason to try to pressure your arranger manufacturer into providing more than one Drum Track (which ARE non-transposing), or even better, especially for the hiphop crowd, allow a tag to make ANY track optionally non-transposing...

So, are there any out there that have tried this, yet?