Jon Johnson Report post Posted July 18, 2017 Some called it the French answer to the MiniMoog, however the RSf Expander I is an incredibly pure and powerful sounding synthesizer, due in part to its high quality components and analog morphing waveforms. It is a rack version of the Kobol keyboard synthesizer. It features 2 VCOs with sweepable, waveforms, 2 ADS envelopes, an LFO, a VCF,Noise Generator, reversible voltage processoer, decay on/off, a self-oscillating 24db low pass filter, and 1 volt Ocatve CV/Gate inputs. View full synthesizer Share this post Link to post Share on other sites
