St. Agnes works together with neighboring Strake Jesuit to form the St. Agnes/Strake Jesuit Orchestra. Throughout the year, the orchestra plays at school functions, liturgies and festivals for both schools.
Chamber Orchestra rehearses 7 - 7:45 a.m. It is a year-long class.  

Two times a week, the chamber orchestra combines efforts with selected members from the band to form the full symphony orchestra. Students enrolled in orchestral winds and percussion rehearse on Mondays at 7 a.m. and Thursdays from 3:05 to 3:50 p.m.

The orchestra practices at Strake Jesuit and are led by Guillermo Hernandez-Ching.