Flute Duet Flute - Level 3 - Digital Download SKU: A0.1336493 Composed by Franz Xaver Gruber and Josef Mohr. Arranged by Erica Wong Ping Lun. Chamber,Christian,Christmas,Classical,Holiday. Score. 6 pages. Erica Wong Ping Lun #922259. Published by Erica Wong Ping Lun (A0.1336493). Celebrate the holidays with an expressive arrangement of this classic Christmas song. The melody soars in the first flute while the second flute provides interesting counterpoint. Complete score and parts are included.