Derek Turner interviews Canadian rock titan EDGAR BREAU Q. Canada’s musical heritage is as varied as its landscape – from the Celtic-and French-infused “music of the maritimes”, via Portia White, Oscar Peterson, Paul Anka, Neil Young, Steppenwolf, Leonard Cohen and Joni Mitchell, to M.O.R. mega-acts like Rush, Bryan Adams, Céline Dion, Michael Bublé, and Justin…