Variations of the Microdexed FM Synth by Codeberg-dcoredump - using a PCM5102A module, and 6N137 for the Midi input, and Microdexed Touch FM Synth by Codeberg-positionhigh - it replaced the 2.8 inch LCD with a 3.2 inch sized LCD, used full-sized Midi in and out sockets, and a 6N137 for the Midi input.
In addition four Circle-based Raspberry Pi synths were made: Three Raspberry Pi 3B+ and 3B synth variations of the miniDexed FM Synth (which is an 8 x DX7) synth, by Probonopd, two using a using a Waveshare WM8960 DAC Hat and one with a PCM5102A DAC module, and all three with a 6N137 MidiIn DIN socket, and one with a Pico PC USBMidi Interface. A fourth MT32-Pi synth using a Raspberry 3A+ and WM8960 DAC was assembled on a breadboard.
The Zynthian Open Synth Platform also use both the Dexed (Microdexed and Minidexed) and Fluidsynth (MT32-Pi) synth engines, but is based on a more traditional low-latency, almost RT, operating system, similar to Patchbox OS.
