I don't know... I wish this was 100% true, because I think that playing a style together with a wav or mp3 file is the best way to make it sound really authentic, but I don't trust much Ketron from this point of view. They have great ideas, but implement them poorly; just to make an example, right now SD1 owners from U.S. are sending their units to AJ to install a (much needed) expansion kit. Why Ketron didn't think of that in the first place? It's like they always leave things unfinished.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.