Britta Phillips never saw herself as a solo artist. “I love being in a group,” the Luna bassist says. But over the last four years, she’s quietly been working on her debut album “Luck or Magic,” which premieres below on Speakeasy today.

The 10-song set is a mix of five originals and five covers, including Fleetwood Mac’s “Landslide,” Evie Sands’s “One Fine Summer Morning,” and Dennis Wilson’s “Fallin’ in Love.”

Phillips...