Cable Box Digital 5.1 converted to Digital Stereo


The cable company broadcasts quite a few all music channels and I would like to play that digital output into my Dac.

But, it seems the digital output is only in 5.1 and won't work with my Dac.
Is there any device that can decode (convert)the 5.1 Digital to a 2.0 Digital?
128x128ozzy
Kr4, Thanks for your comments.
The HDMI signal is going to my TV.

More info:
I own a Tascam DA-300 recorder. With this recorder, I could record hours of uninterrupted music then edit what I would like to keep to an external hardrive.

So, I guess my question now becomes is there any way to convert the Dolby digital to stereo PCM?
if your tv has an optical output it will most likely deliver a 24/48k stereo PCM signal to the DAC.....

Cable boxes have 2 menus for adjustment, a user menu and a service menu. Sometimes the adjustment mentioned by Labtec is in the service menu, and you will need a code to access it. Here is an example accessing a service menu. Your cable company will not likely give you the code to access the service menu, however, a search using your cable box name and model may find it.
My Comcast box will only output dolby bitstream, even if I set it to stereo in the main audio menu and in the setup menu that is invoked by pressing menu with the unit off....Comcast had no idea how to help me so fortunately my TV's dac downmixes to stereo pcm. Good luck, maybe you'll talk to a rep that's knowledgeable.

Give the tv optical output a try if so equipped. I am using optical to my NAD M51 dac and tv and netflix have never sounded better.
Thanks, I will try the optical output. However, my Dac or the Tascam recorder does not have an optical input. But, I do have an optical converter to RCA coaxial.
I'll give it try this weekend.