Boston Casting announced that an open audition will be held Oct. 1 to find on-air talent for 1510 WMEX-AM. The talk-radio station is seeking a host to add to its lineup, and anyone interested should prepare a 2-minute segment about any topic and bring your headshot and resume to the audition, which will be from 10 a.m. to 3 p.m. at 308 Victory Road at Marina Bay in Quincy. For more information, visit www.1510WMEX.com and www.bostoncasting.com.