It appears digitally on October 27, via their own label Nadie Sound, with a physical release on November 24. Several tracks include Red Hot Chili Peppers bassist Flea, who reported he took part "for love, that's all."

The lineup came as a surprise for Mars Volta fans, who believed Rodriguez-Lopez and Bixler-Zavala had fallen out when the band imploded. But they've insisted Antemasque is "not a side gig."