David Letterman on WAGO Ball State University, from 1969

Now a recording of a 21-year-old Letterman’s April Fools Day 1969 broadcast has surfaced on the “non-profit digital library” Internet Archive. And although the sound quality isn’t great (what do you expect from a 40 year old college radio recording?) this broadcast time capsule shows Letterman’s absurdist sense of humor in its infancy.

Read more from the A.V. Club.