Yes you can.
You can take the low tech (cheap approach) and use just the twisted pair. The problem you may run into is hum and some level loss? but it never hurts to try (I have't). Keep pairs grouped per channel and make sure you group the grounds at each end. The problem is you may get a ground loop between the 2 sources which is why I provide the option below.
Or you spend a few bucks and get something the link below, this that actually give you audio and video over twisted pair with some level of expected performance.
http://www.hometech.com/audio/tpaudio.html
JamesO