A Gould documentary would have to entertain however well or ill done. The sources are interviews and film footage and media coverage from the time; respectable but not a documentary to set standards for them all. The examination of technique was rewarding. In spite of posthumous honors there’s a little uncertainty of how great or how crazy he was. It might be valid to say that Gould’s was not the truest way to interpret Bach, but enjoyable and important. Wanda Landowska arguing to Pablo Casals: “You play Bach your way and I’ll play it his way.” You can’t go wrong honoring intention, but may departure be correct? Tricky.