I have the 37PFL6606H and connected it to my oldish Sony DVD recorder with surround sound system. TV is connected via Scart to the DVD recorder, the the sound system is connected via an optical cable. The surround sounds works when playing a DVD but not when I want to listen to a concert on TV via the surround sound. The recorder does not have an HDMI connector, the TV does not have an optical in option. What is the best way of connecting the surround sound to the TV?

The USB port is taken with a Wifi dongle for netTV

Look forward to hearing a solution to this.
Thanks