The music of Syl Johnson has been sampled by everyone from the hip hop group the WU TANG CLAN to the Beastie Boys to Public Enemy and Kanye. But long before that, Johnson was tearing up stages around Chicago with his gritty brand of soul music. He had lots of respect from fellow musicians, but he never reached the heights of fame like contemporaries Al Green or Marvin Gaye. A new documentary is trying to change that. “Syl Johnson: Any Way The Wind Blows” screens Friday as part of the Chicago International Film Festival. We talk with the film’s director Rob Hatch-Miller.