Cable TV digital music

Every now and then, I like to listen to my cable tv music channells thru my stereo, It gives me exposure to music I wouldn't otherwise hear. I'm just wondering if there is any way to improve the sound quality coming from the cable tv digital source.
My system is: Cary 306/200 cdp, Audio Research LS 15 pre amp, BW N802 speakers.
thanks,
joeb