Record sleeve design for Mark Fell's album Intra, published by Boomkat Editions. Intra consists of rhythmic cadences performed by Drumming Grupo De Percussão on the Sixxen metallophone system: a set of six microtonally tuned instruments originally conceived by the Greek polymath Iannis Xenakis. The sleeve is printed with a metallic copper spot colour on gloss board with black inner sleeve.