Gregory Alan Isakov at the Ogden Theatre in Denver (photos)

Just as their first song was fading to a close, Mandolin Orange's Emily Frantz looked at the sold out Ogden Theatre and said, "I knew there were going to be 1600 of you here tonight, I just didn't know you were all going to be listening." And for the rest of the Thursday night, that's what the audience did, they listened, with rapt attention to a night of soaring folk music.