Recent audience gains for KUSC-FM in Los Angeles have boosted its weekly listenership to 525,800, bigger than all other public radio outlets in the market, according to diary-based Arbitron ratings reported in the Los Angeles Times. The Times attributes the growth to the live and local element of KUSC’s drive-time broadcasts and the demise last year of K-Mozart, its one-time commercial classical competitor. KUSC plans to add more live-hosted time slots next month, after the syndicated Classical Public Radio Network goes dark.