Satan playing the pipe, the Organ with legs and fingers, is it the hardest instrument?

it can be, there are harder instruments to learn to play, as far as stringed, fretless have a different sound than fretted, brass the trombone is memorizing the position of the slide. Organs would be all the knobs pedals and keys.

I do love the sound of a pipe organ played by an experienced organist, such a powerful sound