The orchestra holds annual auditions for young musicians aged 16–24. A number of its members are also members of full-fledged professional orchestras such as the Siam Philharmonic Orchestra and the Bangkok Symphony Orchestra. It has twice performed in conjunction with the Siam Philharmonic Orchestra: in the Thailand premiere of Mahler's Third Symphony, and at a gala concert in front of CentralWorld in Ratchaprasong, Bangkok, the site of the 2010 troubles, as part of an event to promote "Healing through Harmony."