These are the music channels that come with your cable subscription, correct?
If so, it should be able to go through the TV. You could connect it separately to your receiver if you wanted to listen without the TV on. But I'm at a bit of a loss as to why you're not receiving audio on those channels.
Samsung HDTV LN40A550P3F connecting to an old stereo receiver (1990s) Yamaha RXV392. Cablevision box is connected to TV (HDMI). Have succeeded in connecting TV to receiver & speakers so that I get the TV sound coming through the speakers when I set the receiver to "Video". Connection is via grey/red cable "Audio Signal" on receiver to "audio out" on TV. But when I set the receiver to "Tuner" to hear the radio, I get no sound. I want to be able to get cablevision radio stations on the receiver. Instead of connecting the receiver to the TV should I connect it to the cablevision box?