Roscoe Mitchell is the rare jazz musician who also moves comfortably within the realm of contemporary classical music. It might even be said that Mitchell is a more convincing artist when working in European-influenced forms. When relying on structural and formal jazz conventions, Mitchell can often come off as stilted and unswinging. On the other hand, his forays into free-time, nontonal improvisation (both structured and unstructured) are as spontaneous and as emotionally satisfying as the best jazz. Mitchell's improvisations exercise extraordinary discipline and intellectual rigor. He's at once a patient and impulsive improviser, prone to alternating episodes of order and chaos, clarity and complexity. Mitchell is a technically superb -- if idiosyncratic -- saxophonist. His tone on alto and soprano tends to be edgy and brittle. At his most lyrical, Mitchell's saxophone lines exploit the instrument's strength as an interval-making machine; his improvised melodies often bear similarity to works by the classical composer Morton Feldman, though Mitchell's music is more overtly emotional. At his most energetic, Mitchell takes advantage of the saxophone's timbral flexibility and the horn's natural tendencies, which allow a player to play fast, scalar lines. Whether playing soft or loud, slow or fast, Mitchell's playing is invariably suffused with passion and intensity.