Jazz musician Dee Dee Bridgewater and actor Keith David talk about their love of and journeys in jazz ahead of the weekend’s performances. Grammy-winning saxophonist and NEA Jazz Master Branford Marsalis will lead the way at the 15th annual Pittsburgh International Jazz Festival. Marsalis and his quartet of talented young lions — pianist Joey Calderazzo, drummer Justin Faulkner and bassist Eric Revis. — will perform selections from their new album “Belonging,” their rousing reinterpretation of Keith Jarrett’s monumental 1974 LP of the same title.