The four members of Los Angeles folk-pop quartet Lavender Diamond are wildly in love with the notion of love. The band describes its music as “the original sound of love,” titled its debut full-length Imagine Our Love, and wrote songs with names such as “You Broke My Heart” and “Open Your Heart.” Cutesy as they may be, these descriptions and titles are also a tad conflicting. How can one imagine Lavender Diamond’s love as the original sound of love when the band’s sound is much more reminiscent of, say, nth-generation Belle and Sebastian sugary pop ballads? And why in God’s good name would anyone open their heart to someone who has just declared that their own heart was, in fact, broken by that particular person? Sounds like an invitation to a revenge heartbreak more than a plea for romantic reconciliation. More likely, such thematic confusion is the byproduct of Lavender Diamond’s own wide-eyed lovelorn earnestness: Sappy as it may be, the band is nothing if not heartfelt. Lavender Diamond performs with David Bazan and All Smiles at 8 p.m. at the Black Cat, 1811 14th St. NW. $12. (202) 667-7960. —-Matthew Borlik