Brass Ensemble Horn,Trombone,Trumpet,Tuba - Level 4 - Digital Download SKU: A0.1320186 Composed by Dennis Bathory-Kitsz. Arranged by Dennis Bathory-Kitsz. 21st Century,Christmas,Folk,Traditional. 62 pages. Westleaf Edition #908694. Published by Westleaf Edition (A0.1320186). The Basque Christmas-giver Olentzero, a kind of Santa Claus, has inspired many folk stories and songs. Olentzero! is a warm introduction and lively arrangement for brass (4331) and 3 percussion. This arrangement follows the original varying time signatures of 5/8, 2/4, and 6/8.