Listen to Protomartyr's '580 Memories'
You're right, this isn't exactly a new song: Protomartyr's '580 Memories' was already published by Joyful Noise in 2015, as part of their limited edition Flexi-Disc Series. It just appeared online however, as it's also included in a new compilation from Hardly Art, called 'Hardly Released: Bedroom Recordings, Demos, Rarities, Unreleased, and Widely Ignored Material'. Listen to the song below.
Protomartyr performs at Le Guess Who? 2017 as part of the program curated by Basilica Soundscape, also featuring Jenny Hval, Prurient, Greg Fox, Liu Fang, and a poetry reading by Meredith Graves (Perfect Pussy).