Does anyone know how American Idol auditions are supposed to work (St. Louis Season 11)?

I know there's a certain number of rounds... does anyone know when the
rounds after round 1 will be? I know that the first one is on Tuesday
but if I were to make it through the first one I would like to know
when the second one is. It won't be on Wednesday because Keith Urban
is performing at the Scottrade Center that night... Thanks for your
help!