FM Keys
A four-operator FM keyboard with no filter.
Two synth voices. One expressive sound.
One played note reaches both synthesis engines. Move horizontally to balance their character; move vertically to shape how strongly they speak.
Start with a factory sound and play. The individual FM and analog controls stay available when you want to shape either layer more precisely.
Start from a named sound, then adjust the instrument to make it yours.
A sketch of the signal path, in the order of the parameter groups.