Just over a month ago US funk group Vulfpeck released an unusual Spotify only album called Sleepify. 10 songs, around thirty seconds each, all completely silent. In an accompanying video, the group urged fans to play the album on repeat while they slept, earning the group roughly $4 US dollars per listener per night. Spotify removed the album this week. Perhaps they had underestimated just how popular Sleepify would be. Emma Smith talked with Jack Stratton, keyboardist from Vulfpeck, and started by asking why they put Sleepify up in the first place.