A string of lights surrounds the audience outside The Tank during a performance by vocal group Roomful of Teeth. 

(Photo: CPR/Brad Turner)

Grammy-winning vocal group Roomful of Teeth headed to the northwest corner of Colorado this summer to perform at an unusual venue. 

As CPR News recently reported, "The Tank" is a 60-foot-tall, metal storage unit on a hilltop outside Rangely that boasts freakishly great acoustics inside. The singers in Roomful of Teeth recorded their entire performance there on an evening in June. CPR Classical will broadcast the one-of-a-kind concert on a special edition of Music Forward, our weekly show exploring contemporary classical music.

Hear the performance at 7 p.m. on Saturday, Sept. 23, or 7 p.m Sunday, Sept. 24. 

The nine members of Roomful of Teeth rehearse and record inside The Tank in Rangely, Colo.

(Brad Turner/CPR)

The performance included music by composers Michael Harrison, Jessica Meyer, Caleb Burhans, Merrill Garbus, and others. 

Roomful of Teeth's visit to The Tank marked a milestone for the unique venue. The Tank's supporters raised thousands of dollars in recent years to convert it to a performance venue and recording studio. 

The vocal group spent several days in Rangely rehearsing and making recordings. For a taste of the unusual sound inside The Tank, check out this rehearsal audio of Judah Adashi's "My Heart Comes Undone, recorded during a rainstorm. Raindrops pelt The Tank's metal walls, creating swells of white noise that blend with the singing.

Roomful of Teeth sings Judah Adashi's "My Heart Comes Undone" in The Tank in Rangely while a rainstorm batters the outside of the structure.

 For more from Roomful of Teeth, check out their exclusive performance of Caroline Shaw's "This Might Also Be A Form of Dreaming" on our Centennial Sounds podcast, featuring Colorado performances of music by 21st-century composers.

Or watch footage of the group singing music by Shaw and Ted Hearne in the CPR Performance Studio:

Roomful of Teeth performs "Allemande" by Caroline Shaw live in the CPR Performance Studio on March 9, 2015. It's the first movement in Shaw's Pulitzer Prize-winning Partita for Eight Voices.

Roomful of Teeth performs "Passacaglia" by Caroline Shaw live in the CPR Performance Studio on March 9, 2015. It's the fourth movement in Shaw's Pulitzer Prize-winning Partita for Eight Voices.

Roomful of Teeth sings "Letter To My Father," a movement from "Coloring Book" by Ted Hearne. Recorded Jan. 17, 2017, in the CPR Performance Studio.