The Imperial March, but it's coming from Vader's chest control panel.

This funny 4.25 minutes YouTube video shows "The Imperial March but it's coming from Vader's chest control panel -- Darth Vader isn’t just feared - he’s a sonic menace with his own built-in soundtrack. His chest control panel? Turns out it’s also a cassette deck, blasting The Imperial March on an endless loop. With every step he rides the sheer power of his own theme, an unstoppable force.... Until he meets his match..."