In Blender 2.9, on adding location drivers to the origin of a Curve,
there is no animation even though the location values are generated by baking sound to fcurves.
Also using a Hook driver to drive the curves creates no animation. Even trying with a Cube, gives no result.
Also, there is an Error - "Invalid python expression". Since the location values are derived from sound, there is no option to link the driver "var" to this value. I tried using "self", but no result.
How to resolve this?