FUGUE – J.S. Bach, Toccata and Fugue in D minor BWV 565 (complete, ~8.6 min, loops).

LFO = clock (128 Hz). Turn its FREQ knob to change tempo.
Seq++ holds all 3650 notes. Space bar / Run button starts and stops.
Organ Three drawbars = organ stops.
Sum LEVEL = master volume.
If silent: pick your output device on the Audio module.