The California-bred songwriter Corinne West has had a career more noted in the U.K. than on native soil, but with her recent hook-up with the estimable guitarist Kelly Joe Phelps, a musical alliance has been forged that may be hard for Americana fans to ignore. With perfectly matched voices and often haunting melodies, the two perform on Friday, April 8,at the Lark Theater. 549 Magnolia Ave., Larkspur. 9pm. $20–$25. 415.389.5072.