Honoring Agustí Fernández's 70th birthday, this 7-CD box set captures his innovative artistry through live and studio collaborations with performers including Barry Guy, John Butcher, Lucía Martínez, &c., recorded across global venues, showcasing his mastery of the piano, free improvisation, and profound creative dialogue with fellow improvisers.

Using multiphonics, extended techniques and an intuitive sense of drama and narrative, Barcelona alto and baritone saxophonist Don Malfon takes his listeners on an 8-part journey of "Mutable" solo performances, using every inch of his horn (including inserting resonant objects), his body, tongue and breath to investigate the outer limits of his instruments.