I couldn't get the link to play continuously - to tell if what I was hearing was a true tour. To me it sounded like some of my more vocal hens. If the song gets louder, more pronounced, with a distinct repertoire of metallic sounds (bells, flutes, rolls and steel notes), then I would definitely say a male.
Could also be a young male just developing his song, or a non-songbred canary, that will never have a loud song. Had all my canaries sang quietly, I'd probably still have a lot more canaries.

Bob