With audio issues, I would recommend trying a couple troubleshooting steps:
1) Try going to your cable box's audio settings, and look for an option to "Optimize Audio". I've seen this work a number of times!
2) If that doesn't help, or there is no option to optimize audio, we'll want to find where the problem is coming from. What I would do is take the A/V cables you have running from the cable box to the Slingbox, and run them from the cable box to the TV, and see if audio works there. If not, you know is coming from either the cables, or the cable box itself (you can try a different set of cables to check).
Hope this helps!
Thanks Evan, i checked the cable boxes audio settings. No "optimize" feature. i am running a standard connection because the Joey I am using from dish network is not equipped with green blue and red connections. My audio from the TV to cable box works fine with red and white audio connections. I read somewhere about firmware updates? could this be the issue, and if so would that resolve the issue?
If it is a firmware thing, giving the Slingbox a factory reset, and repeating the setup process should fix that. Here is our article on a factory reset for reference:
Did you run those same cables (the ones that don't seem to be giving sound for your Slingbox) from the cable box to the TV?