"We would reject things for being too "dramatic." In the context of this story, it would be easy for things to feel too melodramatic, and we wanted it to be kitchen sink-y. But when it came to the song for Llewyn’s audition scene, that’s something we had trouble with: What’s he gonna play for his important audition for this music manager? Those songs are every bit as character-defining as much as the dialogue is, and we didn’t know what the song in that scene would be."
from Vulture’s “The Toughest Scene I Wrote: The Coen Brothers on Inside Llewyn Davis”