Up for sale is a custom 4 octive, 2 channel MIDI to CV Converter microcontroller. It has 2x 5v gates and 2x midi note to cv outs. With its easy-to-use interface, it allows for seamless conversion of MIDI signals to CV signals over 3.8 octives Schematic is provided and is a very simple circuit. This allows you to control old analog synths, or anything needing varying voltage that can be triggered through midi/py midi.
eBay