Instrumental Duet,Viola,Violin - Level 3 - Digital Download SKU: A0.1309889 By Iron & Wine. By Sam Beam. Arranged by K. Speck. Film/TV,Folk,Pop,Singer/Songwriter,Wedding. 4 pages. K. Speck #899035. Published by K. Speck (A0.1309889). Flightless Bird, American Mouth by Iron & Wine, VIOLIN AND VIOLA DUET. Arranged by K. Speck (@kspeckmusic). Key- Eb major. This is the original key. Score- 2 pages, Violin - 1 page, Viola - 1 page.