If you don’t know who Charlie Haden is, this Reto Caduff documentary about the famous jazz bassist will spend the next 84 minutes correcting that. During the ascension of jazz as a musically and socially significant form, Haden held its bottom with generosity and grace. The film is likely more fun for jazz enthusiasts already familiar with Haden’s work; for those less easily diverted by archival footage and adoring testimonies to Haden’s genius, the film’s Wikipedia-like structure and lack of dramatic arc might begin to drag a bit. Ravi Coltrane, who studied under Haden at the California Institute for the Arts, recounts how Haden was always careful to articulate the trials of trying to make a life in music. Caduff’s take is more romanticized. If Haden at any point dabbled in the industry’s seedier side, the director is too busy piling on accolades to pay any mind.