This is something I worked on for quite a while. I have a Casio CT-370 keyboard from 1987 that I use on a lot of my recordings, it was used extensively on the albums Atlantis Falls and Polybius. I took the synth and sampled every single sound inside on all 5 octaves the keyboard has and painstakingly made them into an sf2 file using Swami on Linux.
I went through and recreated every single preset on the synth, as well as all of the percussion sounds. In addition to that, I created 16 of my own presets using samples from the synth. All of the music in the above vid are from the soundfont.
Now this synth can be used freely in the world of MIDI and is completely cross platform. Sf2 files, or Soundfonts, are an old way of collecting multiple samples into one file and can be played in any Soundfont player on Windows, Mac or Linux. LMMS features a great sf2 player, and Linux has Fluidsynth, others exist for both Mac and Windows that are free of charge. You can now add a full Casio CT-370 to your arsenal of sounds!
There was a lot of buzz about the Korg Electribe 2, but lets not forget the older Korg Electribes were some serious music makers, especially when at the hands of a skilled user! I stumbled across this performance by christolikid les oreilles libres that is quite banging. His insane hyperactive beats are mesmerizing and he uses the sampling features of the Electribe incredibly well!
The Electribe SX EX-1 was a somewhat strange unit in that it had two vacuum tubes visible through the front panel that were attached to the amplifier section. This was a pretty strange marketing tact since “tube snynths” were a thing like…. never. But still, there definitely does seem to be a rather warm tone to the EX-1.
While searching for some Kawai K1 soundfonts (since I no longer own my K1) I stumbled across this super-cool album on Archive.org of spacey synth jams made entirely with K1 sounds. I still haven’t located a free K1 soundfont, but this album gives me something fun to listen to in the meantime.