OPL available on Linux. Could be interesting on Organelle

it’s not ARM so will not work on an Organelle.

but its open source (or appears to be) , so could be built

but it should be noted, this is a fork of this old/unmaintained project

which in turn was forked to this

which could be a better porting option since its also supports things like LV2

When I saw it I thought it was related to VOPM, but that is 4 operator and an emulator of the YM2151 used in CX5, FB01 etc, but it isn’t, I think