HP 3314A Function Generator Easter Egg - Hallelujah Chorus

Hook up speaker (preferably amplified) to Function Out BNC jack. While holding down blue (shift), "SW/TR INTVL", and "START FREQ" buttons simultaneously, turn on power, then release the buttons. Unit plays entire Hellelujah Chorus (from Handel's Messiah) in multi-part harmony, and when concluded displays "END" on the digital display.