Yamaha CS-5. A classic monophonic analogue synthesizer from the 70's. One voice, no midi, no effects.
Very cool for a vertex-color low poly type game! The keys are not separate, in case anyone is wondering.
I made a hipoly version first, with separate keys, but the mesh is a mess. Reworking it now.
Very nice... unfortunately it has degenerate bases and generates an error in the unreal engine...