Emphasizing minimalist electronic compositions, Petaluma’s Vespertine Orchestra (in fact, a duo) put their classical training to use to create eerily dark and intriguing pop. Partners Sadie Sonntag and Jesus Contreras do it all. Both music teachers are comfortable in many genres, combining mezzo-soprano voice and multi-instrumental mastery in songs that carry a throwback new wave sound seamlessly into the new century of electro-pop-influenced music. The Vespertine Orchestra play Saturday, Feb. 22, at Clear Heart Gallery. 90 Jessie Lane, Petaluma. 7pm. $20. 707.322.0009.