The Mellotron exposed. This is a very rare view, as the lid can only ever be opened briefly, lest one allow the magic gnomes to escape. The gnomes are responsible for attending to the Mellotron’s exquisitely complex and fragile mechanisms—the choral escarpment, the tape deflangeulator, and so forth—and without their continual, minute adjustments the entire device comes to a clangorous and quite permanent stop. 

Little-known music trivia fact: It is this sound—that of a Mellotron with its gnomes escaped sounding its cataclysmically dissonant death rattle—that you hear at the end of The Beatles’ “A Day in The Life”. Not, as is often claimed, that of three pianos and a harmonium. (Which is itself an impossibility, since harmoniums are internally maintained by garden sprites, who, as everyone knows, patently refuse to work near any object that begins with the letter “p”.)