Bands compete for the chance to win $1,000 worth of recording time from OG7 Studios, gift certificates and cold, hard cash.  Doors open at The Rock, 136 N. Park Ave., at 6:30 p.m. on April 16 and 6 p.m., April 17 for the Wildcard to the Finals follow-up.  Tickets are $7 in advance and $9 at the door.  Both shows are all-ages, with an I.D.-required bar.  Call 629-9211 or visit www.rocktucson.com for more information.