Does this mean his music is magic? Is Tarquin, in fact, a Bard?

His answer to "are bards underpowered" is along the lines of earthly power: with their knowledge of dramatic convention, they should be ruling the world by now. (Like Tarquin.) He thinks they are low on real-world political power. (Unlike Tarquin.) Nale went out of his way not to be one.

Is there a moment where someone else whistles and it's not in black?