The Roland RAP-10 was basically a Roland SC-7 with some added audio capabilities.
This is driver version 2.2, provided by Roland on February 7th, 1996.Download Roland RAP-10 driver for Win3.1, Win95
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I would say that the House of Synth is indeed a great place to get your vintage synthesizers from...I would recommend it even for my mother in law :) Thank for giving me the opportunity to get such a great piece of machinery!!!