Getting your Trinity Audio player ready... This weekend features concerts with Melvin Seals & JGB, Jazz at the Ballroom and the California Pops Orchestra; the unique multimedia piece “Bahaya” at Earthwise Productions; a celebration of Mexican music and dance with Fiesta Sonora at Stanford; a look at all things aviation with Palo Alto Airport Day; and the return of the Great Glass Pumpkin Patch to the Palo Alto Art Center.