From what I have read, the A4/AK doesn’t have the correct circuit design for analog FM. Or so we have been told, there have been other hidden features before. They do have a CPU for the digital controls. Now is there a DSP in there as well? Is that CPU powerful enough for any digital synthesis? Maybe FM can be added in digitally and passed through the analog filters, but once again I’m not sure the audio path was designed this way so who knows if any of that is possible. But if they can manage getting an FM machine in there like on the AR then that would be amazing.

But glad to hear you are liking the AK. This is my next planned purchase once I get some financial things lined up.