The Texas State Jazz Bones and Hill Country Jazz Bones are the jazz trombone ensembles of the Trombone Studio. The groups consist of 5 trombones and rhythm section. Both ensembles serve as a subset to the Trombone Choir program. Admission into the jazz trombone ensembles is by audition only. The Texas State Jazz Trombone Ensembles performed at the 2011 Big 12 Trombone Conference, 2012 TMEA Convention and the 2013 International Trombone Festival. . The Hill Country Jazz Bones were named winners of the American Trombone Workshop's National Jazz Trombone Ensemble Competition and Runner-Up for the International Trombone Association's Kai Winding Jazz Trombone Ensemble Competition. Both groups have performed with acclaimed jazz artists including John Fedchock, Michael Davis, Jiggs Whigham and Michael Dease.