Mason Jennings has a tradition of playing First Avenue’s Mainroom at least once every December. The 41-year-old singer-songwriter has kept busy since his 1997 debut album and victory in City Pages’ Picked to Click poll two years later; he keeps releasing albums with varying sonic identities at a steady clip: 2004’s Use Your Voice and 2010’s The Flood showed what Jennings could accomplish with just his voice and acoustic guitar, 2011’s Minnesota was piano-centric, and 2009’s Blood of Man was more rock-oriented. His latest, this year’s Wild Dark Metal, gets the job done in various ways, whether it’s with something smooth and steady (the poppy melodies of “Old Daze,” the elegant fingerpicking of “Future King”) or something more aggressive (the shadowy and Nebraska-esque “Everglades,” the rollicking “Two Dollar Man”). It may not bring anything revelatory to the table, but it’s one of Jennings’ strongest albums overall, reaffirming his status as one of our state’s most consistent troubadours. Dusty Heart opens.