No Beethoven, no loot

Now THIS is a great idea. Although the Moonlight Sonata is awfully well known; they might be able to pick it out, or find someone who can. Wouldn’t it make more sense to program the code with, say, a Prokofiev piano concerto? What piece would you key your lock to? And don’t you love the very serious questions we tackle here at Ain’t Baroque, Ltd?