Woodwind Ensemble,Woodwind Trio Clarinet - Level 1 - Digital Download SKU: A0.964930 Composed by Traditional Carol. Arranged by Douglas Wattson. Christian,Christmas,Concert,Spiritual. 5 pages. Douglas Wattson #6572971. Published by Douglas Wattson (A0.964930). O Christmas Tree (German: O Tannenbaum) is a German song based on a folk theme. The authorship of this beautiful Christmas carol is attributed to Melchior Franck, who composed it in the 16th century.