They should be in the guide. Lineups vary by location. Select the blue "Programming" tab at the top of this page, then the "Channel Lineup" dropdown, and enter your location information to see a list of channels -- usually the music stuff is near the end.
It may not list each individual channel. My lineup gives the channel range.
801-845 MUSIC CHOICE
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Thank you Queen-Evie. Not checking the date on posts is a bad habit I seem to make a lot, Duh. In any case I finally found them by simply clicking around on the channel numbers larger than the TV listings. In my area they seem to start around the 900's and I am now listening to some relaxing classical music.
Thank you very much. I would encourage Comcast to make these listings more readibly accessible to customers for their convenience and even advertise their music offerings more widely, because for people like me who rarely ever watch any television at all except for the local news, the music channels are more important than the television offerings which are a vast wasteland, as Newton Minnow (then the FCC chairman) said several generations ago. I'm probably one of the few people old enough to even remember that statement, haha.