Topic caused me to revisit the VOPM plugin, and then I found this goldmine:
https://www.kvraudio.com/forum/viewtopic.php?t=277864
I cannot get VOPM to be stable In Renoise unfortunately , However I much prefer the sound of Aly james ‘FM Drive’ - have you tried this ? YM2612 Vst including the PCM channel ! You even get a VGM to TFI tool !