Not too much buzz yet about the 'Audio Key' function. This strikes me as being functionally similar to the PSR S950's audio multipads... Except you can have seven of them (rather than four) and that they use keys rather than buttons to trigger.
So far, in the OFFICIAL ad copy, there's no mention of whether these are tempo synced and can loop (being able to loop would be a huge improvement over the S950's audio multipad feature). There's an awful lot of conjecture, but I am not coming off the fence until I see the manual (not out yet).
But, if Roland for once got it right, and had them loop and be synced, that's an incredible feature. Finally, the melding of audio loops and MIDI styles (noticed how Roland have mostly quit using 'styles' and are moving to saying 'rhythms' nowadays? LOL Wouldn't want to remind the kids about this being an 'arranger' now, would we?!). The .WAV's do get leaded in per Performance, so that's quite cool.
It's the little stuff flying under the radar that often turns out to be the game changer...
BTW, I know Ketron have been able to do this for a while, but it's new at this price point.
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An arranger is just a tool. What matters is what you build with it..!