He is not so smart. He is not so smart also.
All orchestra instruments are to be amplified and fed to the central quad board.
The Leslie on the Hammond is to be miked in quad and isolated from the other instruments, enabling assorted mysterious ethereal effects to be generated in an 'audience-surround' mode. The ARP output is taken stereo 'direct' into the board. The player monitors himself on a small amp. The bass drum front head should be removed, as well as the bottom tom-tom heads. The player can monitor the whole mix via headphones.