All students at Fenn study vocal music, music history, and composition. In addition, there are opportunities to particpate in choral and instrumental ensembles. Boys learn to use their voices as instruments, developing strong vocal technique and singing in harmony. Students also develop music reading skills during these years. In music class, they use software programs such as GarageBand and Sibelius to compose music, and learn to play the keyboard at a fundamental level. Upper School students who select Rhythm Ensemble classes form a small guitar and percussion-based band and tackle rock, blues, and jazz pieces. Upper School students may participate in hip hop dance class. Boys may also take music composition at an advanced level.
Fenn also has an extensive co-curricular music program. Upper School are encouraged to experience the challenges and rewards of a cappella singing. Depending on their grade, boys may join the Treble Chorus, Concert and Marching Band, the Jazz Ensemble, the String Ensemble, Voicecrack A Capella, and occasionally small ensembles and chamber music. Eighth and ninth grade students can participate in the Fenn-Nashoba Brooks Musical. All band members are eligible for private lessons with skilled professional musicians.