This maintenance completely updated the sound system of the infield. A set of RIVAGE PM5 digital mixing system was newly configured in the hall of the Opera House as the main mixer, and a CL5 was equipped as the standby Mixing console, and shared the input signals of all Rio series interface boxes with RIVAGE PM5 system. In addition, a CL1 digital Mixing console is configured in the concert hall, and a QL1 digital Mixing console is installed in the small theater.