Dear man singing at the Canal St. subway stop:

You are terrible.

Not only are you singing so quiet that it's practically mumbling, but you have your microphone turned down so low we can barely even hear it over the mumbling itself. You need to learn some new songs, all the actual lyrics to said songs, find a better subway stop than an empty Chinatown stop at 10 PM and finally: become better at singing.

Sincerely,
Jon