Lament for Trombone and Organ by composer Jeremy Niles Kempton is a serious and lyrical work of about six minutes in length for advanced performers
Here is an excerpt from the ITA Journal review of this work:
Danish National Symphony Orchestra
Recommended for advanced performers
a vast array of textures and string effects were pioneered by this adventurous composer
Sauer - Practice With Bach for the Alto Trombone, Volume III Original Composition Lament for Trombone and OrganRalph Sauer's landmark new work, Practice With Bach for the Alto Trombone, Volume III, will challenge your technique and musicality with demanding new tudes. Based on the keyboard works of J. S. Bach, each of the three volumes is available in five different versions Alto Trombone, Tenor Trombone, Bass Trombone, Euphonium, and Tuba. Each version is customized for the individual instrument (choice of key, range, ornaments, etc.). Volume Three contains