Despite knowing her ethereal voice from Stars and Broken Social Scene, we weren’t terribly excited for Amy Millan’s solo performance at the Black Cat on Saturday. From listening to her debut solo album, Honey frrom the Tombs, we already knew that her music 1. would be more alt-country than mood-rock and 2. would be much quieter and less dynamic than her more high-profile groups. We were only semi-right on both accounts. While she certainly brought…