Digital Optical To Xlr How Do I Convert 5.1 Into 6 Analog Channels For Mixing Board?

How do I convert 5.1 into 6 analog channels for mixing board? - digital optical to xlr

I have a small theater with 24-channel board that my PA controls. Not only does his live show, but DVD movies and TV. I have the 5.1 digital audio signal into 6 analog channels to convert. Anyone know a piece of art that carries digital audio (optical or HDMI) and can spit out 6 analog line (RCA or XLR)?