You know that popular joke about Stephenie Meyer slamming her head on her computer keyboard and producing the Twilight novels? Well, Zoë Keating can make better music by putting her feet on her keyboard while playing the cello. And that’s no joke. Fans have built a cult following around one-woman-orchestra Keating, who’s created an enterprise from live shows and self-released albums. She’s performed and recorded with Imogen Heap, Amanda Palmer, Tears for Fears and John Vanderslice, to name but a few, and her grassroots practices have led her to speak regularly on artist-empowerment. Set the weekend off right when Keating performs on Friday, July 19, at the Napa Valley Opera House. 1030 Main St., Napa. $25—$30. 8pm. 707.226.7372.