I was driving the car with the HD radio today (my newer car, a Toyota, doesn't have it). I was fooling around with the HD and saw 4 channels on 105.1. The main and HD-2 and HD-3 were various forms of country, and the HD-4 was mostly older pop and soul (sort of like what the KTWV currently plays)
Audio quality was a bit worse than Sirius XM. If some station ran all eight HD channels, what would they sound like? Telephone quality? Two-way radio?
I tried a few other stations:
93.1 (Jack FM) had some sort of music format, I forget what it was....
94.7 (KTWV the Wave) played "smooth jazz" (the original KTWV format)
101.1 (KRTH) had KNX news and a music format (not the 50s oldies it used to have)
107.5 (KLVE) had two signals. One in Armenian, the other in (I think) Farsi... (the Korean station is gone)
I didn't get a chance to see if the Mormon format on 100.3 survived the sale to EMF, though....