The John Adams High School instrumental music program has approximately 90 wind, and percussion musicians who participate in various performing groups. These groups include the Marching Band, Wind Ensemble, Symphonic Band, and Jazz Bands. There is also a Flag Corps who perform with the Marching Band.

The music department strives for excellence in all areas of its performing ensembles and stresses the importance of learning and enjoying music as a part of a student's well-rounded education.