Vintage YAMAHA EMT-1 FM Sound Expander Midi Synth Untested as found

Casio GZ-50M GM Midi Sound Module

MIDI Serial Interface (3.3v) (Raspberry Pi, ESP32 Breakout Board)

Vintage Synthesizer Pasco Scientific

KORG 03R/W 1U Rack Sound Module Synthesizer Working Tested New Battery

Roland SN-U01-05R Orchestral Strings Data Card for U-110 U-20 U-220 D-70

RARE Roland rackmount GR-50 PN-GR50-02 DATA ROM Sound Library Card

Novation CIRCUIT Groove Box Synthesizer Drum Machine