SHEILA JORDAN has always thrived in uncharted territory. The NEA Jazz Master came up on the Detroit scene in the 1940s as part of a coterie of young players in thrall to the mercurial genius of Charlie Parker (who championed the young singer). She spent years developing a high-wire improvisational approach unlike anyone else on the scene, and made history with her classic 1963 debut Portrait of Sheila, Blue Note’s first album by a vocalist. The project’s pianoless instrumentation introduced Jordan’s affinity for the most stripped-down settings, particularly on “Dat Dere,” an exquisite bass/vocal duet with Steve Swallow. Over the years she’s created bandstand magic with fellow masters such as trombonist Roswell Rudd, pianist Steve Kuhn, and bassist Harvie S. Returning to the duo format she pioneered with S, Jordan is joined by bass master Cameron Brown, a relationship that dates back to the mid-1970s. After appearing on dozens of albums as a sideman with the likes of George Adams and Don Pullen, Archie Shepp, Connie Crothers, and George Russell, Brown made a late-career recording debut with 2003’s The Hear and Now (OmniTone) featuring his frequent employer, sax legend Dewey Redman.