UNSC Symphony Orchestra
From Halopedia, the Halo wiki
The UNSC Symphony Orchestra (or UNSCSO for short) is a instrument ensemble/group of over 100 members. All members are presumably part of the UNSC Defense Force [1].
In 2556, they performed a piece of music in the UNSC Symphony Hall as a tribute to Master Chief Petty Officer John-117's heroism during the Battle of Earth and the Battle of Installation 00. Beyond that, very little is known about the symphony orchestra.
