What you want to do is very easy in a DAW and since you have RB you should do it there. Place each prerecorded instrument on a separate track. That is one track for the bass, one for a guitar, etc. Then either mute the ones that you don't need or solo the one you do need.

I hope this helps you.


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64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware