An anonymous reader writes "Levy Lorenzo managed to build a MIDI sequencer that is powered and operated by hamsters. The hamsters work in teams of two to control melody and rhythm, and Markov chains are used to modify the hamster-based inputs. The sample MP3 sounds pretty good."
From the article: "The MIDI sequencer intelligently produced melodies by manipulating the musical elements of rhythm and note-choice. Guided by inputs based on hamster movements, Markov chains were used to perform such beat and note computations. In culmination, 3 simultaneous voices were produced spanning 3 octaves and 3 rhythmic tiers."