A few weeks of solid work on maxYMiser has yielded "maxYMiser FM" with major advancements:

Four fresh timer effect routines!!
* squarewave FM timer effect
* buzzer FM timer effect
* syncsquare timer effect (with research from Tat/Avena and Ben/OVR)
* syncbuzzer FM timer effect

* marvellous "FMergency" example music from YQN/Hemoroids
* buzzer wave selectable in mixer sequence
* sequences extended from 31 to 63 steps
* minor bug fixes and improvement

Not all the new effects work properly on emulators, details in the manual.