An album’s credits can speak volumes, not just about who plays on a record but how the weight of creation is divided across artists. On When Will the Blues Leave, captured at a 1999 live concert at the Aula Magna di Trevano in Switzerland, the equal billing of Paul Bley, Gary Peacock and Paul Motian forecasts the equal contributions that each musician plays in shaping the group’s sonic geometry. From the moment Motian’s sticks slink across the kit like a tango dancer at the outset of Bley’s “Mazatlan,” spurring his bandmates into dervish-like activity, the dynamics are set for the trio’s mutating music.
That music can feel organic and pulsating, constantly evolving like primordial matter, but also rigid and strongly defined like a hypercube or M.C. Escher lithograph. The group achieves the heights of this state on “Moor,” a Peacock original that sees the three each attempt to stretch the melody and cadence into differing, parallel abstractions. On the title track (an Ornette Coleman composition), Bley’s piano work eventually takes on a spiraling, almost illusory quality as his hands scramble up and down the keyboard.