Yes, but it depends on what connectors you have on the surround sound unit.
Can you connect C31 to surround sound to TV all via HDMI?
If not does your surround sound have a digital coax audio connection, or an optical audio connection (you would need an adapter at the C31 to use that)/
If not and your surround sound needs red/white audio, you would need the 10-pin connector adapter on the C31 (make sure you get the COMPOSITE adapter)