Just a month after "American Idol" winner Jordin Sparks was showered with confetti on the Kodak Theatre stage in Los Angeles, the top-rated Fox series is gearing up for Season 7 auditions.

San Diego, a first-time audition site, will kick off the seven-city tour July 30. New audition cities Omaha, Charleston, S.C., and Philadelphia join Dallas, Atlanta and Miami on the tour, which last year attracted 100,000 hopefuls, according to Fox estimates.

"We do like to see America," executive producer Nigel Lythgoe says of the annual search for vocal talent. Smaller cities, such as Charleston or an earlier site, Greensboro, N.C., "produce some wonderful stuff."

The tryouts will start a week earlier than last season because producers also will be conducting auditions for a new Fox reality series, "The Search for the Next Great American Band."

Atlanta, Charleston, Dallas and Miami may bolster "Idol's" typically strong Southern flavor. Last season's finale, in which Arizona's Jordin bested Washington state's Blake Lewis, was the first without a singer from the South, which provides one of the largest fan bases.

Whether any city will perform as well as Season 6's Seattle, much maligned by judge Simon Cowell, remains to be seen. (Jordin and Lewis auditioned in Seattle.)

"It's amazing, isn't it?" Lythgoe says. "Everything was condemned about Seattle ... and out of it came Sanjaya (Malakar), the two finalists and the songwriters" who wrote Jordin's finale single.

After battling the elements in some earlier seasons, "Idol" will hold most auditions indoors, save for Qualcomm Stadium in San Diego and Dallas' Texas Stadium, which has a partial roof covering.

As with past audition tours, "Idol" producers will narrow each city's field to 300 to 400 of the best and worst singers. Lythgoe and co-executive producer Ken Warwick will then cull to about 120 per city to sing to judges Cowell, Paula Abdul and Randy Jackson.

Producers want to find a way to make sure more good singers make it through the initial auditions and the Hollywood round and into the final 24. "Too many slipped through the net," Lythgoe says, adding no big changes are planned.

Last season, Tuesday and Wednesday episodes (29.5 million viewers and 30 million, respectively) were TV's top two shows, although Tuesday was 5 percent below Season 5's record number. Wednesdays matched Season 5, also a series high.

Auditions are open to singers 16 to 28 years old as of July 28. Details are at americanidol.com.

'IDOL' AUDITION SITES

Season 7 auditions schedule: