The Pocket Operator series is a fun and portable way to make electronic music, and the PO-28 is perfect for the fan of crazy bleeps and dings and other sounds you might find in a vintage arcade. It's hard to describe a sound set, but picture this: it's 1982 and a brand new magic video game cabinet has arrived at the local amusement arcade. Somehow the machine is stuck in sound debug mode. Now you're getting the idea.