Marguerite,
Here I give you a few ensemble works by american composers including harp.
In 2007, the american composer Adrienne Albert composed Between the dark and daylight, a three-movement work for flute, violin, viola, cello and harp (Nightdreams, Lullaby, and Daydreams)
Ryan Carter
American composer originally from Wisconsin. Spirals (2005) for flute, harp, and vcl.
Alan Hovaness – Garden of Adonis (flute & harp)
Alexandra du Bois
American composer. L’Arc des Étoiles (Arc of the Stars) (2007) for flute, harp and percussion (7’)
George Crumb:
-Ancient Voices of Children (1970), for mezzo-soprano, boy soprano, oboe, mandolin, harp, amplified piano (and toy piano), and percussion (three players)
-Federico’s Little Songs for Children. Soprano, flute/piccolo/alto flute/bass flute, and harp
-Quest for guitar, soprano saxophone, harp, double bass, and percussion (two players)
Hope it helps you. Regards,
Zoraida Avila