A Grateful Dead fan — someone with way too much time on his hands, no doubt — has assembled a bizarre document of the band’s legendary 1977 tour.

Using shows available on Archive.org, Michael David Murphy‘s 90-minute piece, which is called “Tuning ’77,” consists solely of the Dead tuning up and talking. No actual songs are heard.

Murphy says the file is “a seamless audio supercut of an entire year of the Grateful Dead tuning their instruments, live on stage. Chronologically sequenced, this remix incorporates every publicly available recording from 1977, examining the divide between audience expectation and performance anxiety.” If you have the time and are brave, check out “Tuning ’77” on Archive.org.

This isn’t the first time non-song live recordings have been assembled into one big piece. In 1991, Neil Young released Arc as part of the deluxe version of Weld, his live album with Crazy Horse. The 40-minute disc consisted of drawn out song endings — just the endings — edited together. The first instance of this was probably Having Fun With Elvis on Stage, an Elvis Presley album solely consisting of stage banter.