The Orange County Youth Symphony will present its summer orchestra camp concert at 7:30 p.m. in the Monroe-Woodbury High School Auditorium on Saturday, Aug. 14. The program includes “Sinfonia No. 9 in C Major” by Felix Mendelssohn and “Serenade in G Major, K. 525, Eine kleine Nachtmusik” by W.A. Mozart. “Concertino for String Orchestra” by Huadong Lu will premiere at this concert. General admission is $15; $6 for seniors and students.