It’s the 50th anniversary season of the Los Angeles Chamber Orchestra and the festivities include premieres, stellar soloists, including 94 year-old pianist Menahem Pressler later this month, and two major new initiatives. This ensemble our own Jim Svejda has dubbed “America’s finest chamber orchestra” has launched an ambitious plan to help diversify its ranks: the West Coast’s first fellowship program for gifted musicians from under-represented communities. It’s a partnership with the Inner City Youth Orchestra of LA and the USC Thornton School of Music. And next month concertmaster Margaret Batjer unveils LACO’s new chamber series, “Mozart and Brahms In Focus”. Batjer tells me the choice of Mozart is a no-brainer: his music represents the peak of the repertoire. Oh, and Margaret Batjer says, Beethoven and Schubert fans? Don’t panic! Their music will pop up on the series, too.