PORTLAND — Musical couples, including well-known fiddler Lissa Schneckenburger and double bassist Corey DiMario, will play songs of love in celebration of Valentine’s Day on Saturday, Feb. 11, at One Longfellow Square.

The “Sweethearts Night Out” concert will also feature roots musicians Darol Anger and Emy Phelps, and Brittany Haas and Kai Welch. They will present a musical evening of both the sweet and the scary side of romance, from their perspective as couples.

Besides capturing the driving rhythm and carefree joy of dance tunes with her skillful fiddle playing, Schneckenburger is known for her winsome, sweet voice.

DiMario, a member of the Lissa Schneckenburger Band, has played in prestigious venues around the United States with such notable performers as Liz Carroll and McCoy Tyner.

Respected among modern fiddlers for his versatility and depth, Anger has helped drive the evolution of the contemporary string band through his involvement with numerous ensembles such as his Republic Of Strings, the Turtle Island String Quartet, the David Grisman Quintet and Montreux.

Singer and guitarist Phelps has performed throughout the Northwest for many years. She was a founding member of the Ashland, Oregon, band Borderline. She has shared the stage with Ricky Scaggs, Bruce Hornsby, The Nashville Bluegrass Band Duke McVinnie, Willis Alan Ramsey and The Sally Van Meter Band. She has performed at the prestigious New Music America Festival in Philadelphia, The North BY Northwest Singer-Songwriters Festival, Wintergrass Bluegrass Festival and the Northwest Folk Life Festival in Seattle.

Haas is a member of the Boston-based alternative bluegrass band Crooked Still. Her first CD, “Brittany Haas,” released on Ook records in 2004, includes guest musicians Bruce Molsky, Anger, Todd Sickafoose, Mike Marshall and her sister, cellist Natalie Haas. Her repertoire focuses on Appalachian mountain music played on the five-string fiddle.

A multi-instrumental, Welch is also a singer-songwriter and producer. Over the last year, he collaborated on the Abigail Washburn album “City Of Refuge,” a combination of old-time and indie-pop music.

Tickets to the 8 p.m. concert are $20 advance/$23 at the door.