I have had problems with some Ketron SD2 alternative Bank patches when using RB - most frequently with Bank 2. The alternative Bank setting works from the start but reverts to the GM patch number if for any reason the song is stopped or there is a long silence. This becomes a problem when say Clarinet Patch 99 Bank 2 reverts to GM patch 99 Crystal. I have suspected the Ketron itself, RB or even the Edirol USB Midi connection for not retaining the correct Bank number without a resolution. The Midi solution is to repeat the patch coding in the Event List where required. For BIAB, I stick to the GM Bank only. For studio work in RB, I convert all tracks to Audio.