It’s an in-studio live-concert double-header as Jenna Mammina and her pop band, The Charmers, perform in the KPFA studio at 10 p.m., and dynamic veteran singer-songwriter Dirk Hamilton commands the mic at 11 p.m., with Tony Ferro engineering. Both acts will preview their upcoming shows in Berkeley: Jenna & the Charmers at the Freight & Salvage Coffeehouse on November 1, and Dirk Hamilton at The Back Room on October 28.