"When you listen to someone sing from inside their head, their same mix, and you listen to their voice as loud as they like it, or the track of the band as low as they like it, you can really hear all of the nuances and the mistakes if there are any."

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Also, getting the chance to play a supporting part meant that I didn't have to do as much as the protagonist, such as running around telling the story. [As the protagonist] you push the story whereas, paradoxically, as a character part, you have a chance to explore some of the nuance and some of the more complicated aspects of a character.

— Ben Affleck