Lisa B. Kelley + If, Bwana

A two-week festival curated by composer, improviser and Deep Listening guru Pauline Oliveros continues with sets from two close collaborators. Al Margolis, the multifarious force behind long-running electroacoustic project If, Bwana, offers a configuration of voices, strings and laptop at 8pm, then sticks around to join vocalist Lisa B. Kelley in Oliveros's The Witness at 10pm.