Doc McKinney, the Minneapolis-born, Toronto-living producer and manager who's worked with Lucy Pearl, The Weeknd, Drake, Young Buck, Esthero and thestand4rd spoke with us about brands and music — he had a reluctant hand in the Hamburger Helper mixtape that popped off in the spring — Canadian hip-hop past and present, the ways having kids affected his business and his art, the ideal circumstances for collaboration, Spongebob, Lee Scratch Perry, Janet Jackson, the pitfalls of interviews and J Dilla.