Normally Smithfield Fair (SF) is revered for vocal harmonies, yet on its 30th album, the Baton Rouge–based folk collective does an about face and showcases its instrumental side over the course of 24 tunes and 57 minutes. Roughly two-thirds of the tunes were culled from SF’s bountiful discography.

A half-dozen make their debut, including “Tugg, the Bull Terrier” with its boogie guitar and catchy accordion riffs. Three others were extracted from larger bodies of previously released work and rechristened as their own entities.

Regardless of source, bundling these instrumentals together allows SF’s instrumental virtuosity and keen compositional abilities to be more salient. Several tracks feature Dudley-Brian Smith’s acoustic guitar mastery (“An Ancient Tune”) and breathtaking finger-picking (“Perseverance”). Additionally, the arrangements are often clever.

“The March of Time” starts with a sinister guitar part and thackety rhythms before Jan’s accordion seizes control and soars to triumphant heights. And like it began, the foreboding guitar part returns, only to end the composition softly. Several accordion-fueled melodies are celebratory or processional in nature. Percussion plays a big role as well, sometimes with a touch of mysticism or clanking objects for a snappy beat.

Though this is an album of surprises, “Snow Child,” a gorgeous, introspective piano composition, is perhaps its biggest. At the outset, Jan commands hair-raising attention by striking a few high ivories before rolling gently along. Admittedly, it’s not her natural instrument to compose on, but like the rest of this, it sounds just as inspired and natural.