Another cool feature of the BIAB Real Drums is that they adapt to different tempos without losing the pitch; as far as I know this feature is shared only by two arrangers: the SD1 and the PA1X-pro (I think that the PA 800 can play loops in sync with a style as well, but am not sure about the time- stretching feature). The difference is that the SD1 will accept only mono loops, while the PA1X-pro will read also stereo loops. So, Al, I think that your best option could be to get another Korg...

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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.