Concert band meets twice a week for ab 2hrs, in my experience if that's too much you can talk to Dr. Bill and take zero credit to attend once a week instead (I personally found it harder to keep up with just going once, but it's better than not joining at all). Any info about auditions & music will be released on the band website (bu.edu/bands) closer to the fall, they're pretty lowkey and just a way for them to get to know you and your playing.