“Infinity Repeating (2013 Demo)” is a previously unreleased collaboration between Daft Punk, Julian Casablancas, and Casablancas’s band The Voidz. After the release of Random Access Memories and “Instant Crush”, Casablancas confirmed in several interviews the existence of a second collaboration he had written with Daft Punk.

According to Casablancas, Thomas Bangalter caught up with him after attending a show by The Voidz, and Casablancas urged him to release the song.

Julian Casablancas Details Weird Second Daft Punk Collaboration He Wants Released — Stereogum

Daft Punk teamed with Julian Casablancas on the Random Access Memories single "Instant Crush," but according to Casablancas, that's not the only song they recorded together. During a Revolt TV segment with his band the Voidz, Casablancas mentioned that he recently saw Daft Punk's Thomas Bangalter and urged him to release the other song they [...]

The song would finally release as part of this anniversary reissue and would be hailed as the duo’s last song and last music video “ever” in the band’s press release.