There was some project to use/fork MAME to emulate a bunch of digital synths, running the original ROMs with a GUI to replicate the original controls? Some of t

There was some project to use/fork MAME to emulate a bunch of digital synths, running the original ROMs with a GUI to replicate the original controls? Some of those might have GM support with far better sounds than any consumer hardware, and in theory that emulator could be wired up to some PC emulator with MIDI output support?