The Tonestar 8106 is a compact Eurorack synth voice based on a combination of the Juno 106 circuits and the ARP 2600. The voice sounds fantastic and has a single VCO, LFO, filter, VCA, and two envelopes. There is a nice feedback control that allows the output to be routed back through itself for some fun unpredictable results. The sections of this synth voice are normaled together but can be interrupted and used independently. This module is in great working condition but has some rack rash. This is the grey version.