At their best, duos are a uniquely formidable type of creative chemistry. Whether Simon & Garfunkel or Pet Shop Boys, Steely Dan or Soft Cell, an alchemical magic occurs when two simpatico minds go in pursuit of a singular result. Torquil Campbell and Chris Dumont have been making music together since the late 1990s, quite some time before the former achieved worldwide success as singer in Canadian quintet Stars.