Great advice from master musician Kenny Werner.
“Moving slow enough for the hands to feel like they are aware of where to go next.
This sets up a platform for one to increase the speed the next time around.
Because one is moving slow enough to to program the hands to know… and to remember which finger goes where without one having to remind them.
It is only by creating this auto-muscle memory that one can play clearly and economically even as the tempo increases.”