Box set of unreleased material, compiled to celebrate Hans-Joachim Roedelius’s 90th birthday, and now available across four CDs. Most of the music on ‘90’ comes from the two-track Revox tapes (1968 - 80). Working with his Echolette tape delay and Farfisa organ - the equipment on which Achim recorded his beloved ‘Selbstportrait’ records and much of the seminalwork with Dieter Moebius and Michael Rother - the Revox tapes document the processes and sounds that continue to inspire generations of music lovers and sonic adventurers