About 30 or 40 years ago I bought a three sided LP (called Matching Tie and Handkerchief) by Monty Python’s Flying Circus. One side had two sets of parallel grooves and, depending on which groove the needle landed in, you could hear one of two sets of comedy sketches. There was no mention of this on the album cover; it was just to mess with your mind.
About 30 or 40 years ago I bought a three sided LP (called Matching Tie and Handkerchief) by Monty Python’s Flying Circus. One side had two sets of parallel grooves and, depending on which groove the needle landed in, you could hear one of two sets of comedy sketches. There was no mention of this on the album cover; it was just to mess with your mind.