with audio-only simulcasts on 87.7 FM.
Not an FM "simulcast" at all - ALL ch 6's do this, due to 87.7 being right around the audio carrier for ch 6. The FM band legally does NOT go down past 88.1, you know...
Try it & see - if you have a channel 6 from either cable or antenna & hook it up to an FM radio, if the radio goes down to 87.7, you'll be picking up the audio for that ch 6. I used to listen to the audio for WPSD-TV 6, NBC Paducah in my car when I went to SIU-Carbondale.