Aaron Hettinga arranges and performs as a freelance trombonist, bass guitarist and low brass multi-instrumentalist out of Grand Rapids, Michigan.

He is a musician with a diverse range of experiences in the world of music. After over 30 years of experience in the use of Finale music notation software in practice and consultation, he also maintains this website to promote his musical services.

A published arranger, Aaron’s notated work has additionally appeared in performance on the concert stage, in worship services, the International Trombone Association Journal, and in various academic papers and scholarly works.

Let Aaron know when you need something specially prepared for your event. In addition to the works for sale on this site, he's written arrangements for ensembles including Full Orchestra, Wind Ensemble/Concert Band, Jazz/Big Band, Combo, Vocal Ensemble, Chorus and various-sized horn sections.

Staff Arrangers

  • George Ferencz taught music theory and arranging at the University of Wisconsin-Whitewater, and his piano-vocal arranging for Hal Leonard includes the Broadway folios for Wicked, Avenue Q, Urinetown, and The King and I. He’s best known for his Robert Russell Bennett research, and is editor of Bennett’s memoir, The Broadway Sound (pub. 1999).

  • Caleb Elzinga is a professional saxophone player from the Michigan midwest. He studied jazz saxophone through graduate school and has been an active member in his musical community from a young age. Caleb has played with a variety of bands of every genre, including reggae, pop, jazz, and gospel. Writing and arranging became a focal point post university and remains a staple in his musicians umbrella of ability. Having played in many horn sections, clarity has always been the greatest asset. He arranges for Lighthouse Full Life Center Church and the Blue Water Kings. Caleb is currently on the road with Joe Hertler and the Rainbow Seekers.

  • Allsen taught courses in Music History, World Music and Interdisciplinary Arts at the University of Wisconsin-Whitewater. He also performed on bass trombone for nearly 30 seasons with the Madison Symphony Orchestra. Most of his arrangements and compositions have been created for the Glenwood Moravian Trombone Choir, a group he cofounded in 1983—he is still co-director of the group.

  • Steve Ash is the son of a music teacher mom and agriculture teacher dad. He stayed the course and completed a double major in soil and crop science and trombone performance. Steve's day gig as a research scientist supports his passion of tromboning, composing, and arranging music. Steve is a member and co-director of the Glenwood Moravian Trombone Choir. He especially enjoys performing Gospel and Big Band swing music. When not at his day job or doing something music, Steve can be found exercising, gardening, and enjoying the outdoors.