Mind Maintenance lands mere months after Joshua Abrams, who appears here on guembri, released the latest instalment from his Natural Information Society collective, Descension (Out Of Our Constrictions). Like that album, Mind Maintenance is all about “ecstatic minimalism”. But things are pared back yet further: with Abrams accompanied only by Chad Taylor on mbira, the nine songs here are relentlessly circular, patterns locking in gently and then slowly straying into different kinds of sync. There’s a lightness and a freshness of tone that embraces the properties of both guembri and mbira: buzzing, burring, possessed of an astral timbre.