April 5, Danforth Music Hall By Clark Kingsbury The first thing to remember about Canadian musician k-os: he’s not a rapper. I mean, he raps, and he has identified himself as a rapper in the past, but rapping is such a small part of his musical arsenal that it would be a disservice to cling to that label. And when he arrives at the Danforth Music Hall April 5th, patrons should expect far more than a typical rap show. k-os, whose name plays on the acronym K.O.S. (Knowledge Of Self), has been floating around the Canadian music scene for well over a decade now. In the early-to-mid-nineties he released a…