I was pleased last year when I added and HD Radio module to my car stereo. There were several sub-channels available in Tucson and 3 stations on AM that broadcast in HD Stereo. I've noticed the stations dropping the subchannels slowly and realized today that there is only one FM station that continues to broadcast a sub-channel. On the AM side, there remains one station broadcasting music (and it sounds great). So it appears that the Tucson market is no longer utilizing the HD spectrum. I've travelled through Phoenix and Los Angeles and enjoy listening to the variety that is still available. So is your market growing HD stations or are you losing them?