"Somewhere where there's silence would be good." = Why he'd like being an artist if he wasn't a musician.
"Isn't gay marriage kind of the death penalty?" = What Boy George said to him when they were discussing gay marriage and the death penalty.
"One of those titanic moments." = The election of Barack Obama (presumably "titanic," large, not "Titanic," shipwreck).
"I'm writing an opera in French"... He is, and he's a native French (and English) speaker, a consequence of Canadianness.