In that case you can control the start function on the Boss playing one of the internal styles in the RD 700 SX (I know that there are, just like the old RD 700 had them...)
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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.