amfmxm said:Today, according to radio-locator.com, we have more than 25 local signals available... plus another 100+ on my Sirius/XM receiver... plus another few thousand (?) via the web. Our FM stations all stream and offer smartphone apps, too.
Night and day.
Like I said, don't invest too much in HD Radio...
Like Mark, I think that's a good reason to develop HD radio. First, other than the cost of the receiver, which is rapidly becoming the same price as a non-hd receiver, it's the only expanded service that's truly free. Streaming and satellite both have costs associated with them. Further, HD can be localized where the others cannot. It will take years for enough HD receivers to enter the market to make a difference, but just like basic FM, as the cost of adding HD becomes near zero, more and more receivers will have it and sometime it'll reach critical mass. That's a while away, but I'd bet it's going to eventually happen.
I would also differentiate this from C-QUAM AM stereo in several major respects. First, I respectfully disagree that the FCC's marketplace decision was the problem with AM stereo. Those that disagree with the FCC's decision need only recall that the FCC originally select an AM stereo system by Magnavox which was universally hated by just about everyone, so they reversed themselves and said, "okay, you don't like our decision? Then you decide for yourselves". Within a couple of years, C-QUAM emerged as the defacto system and despite its problems, it worked okay. I personally installed two AM stereo stations and oversaw a second conversion from Harris to C-QUAM. There were multiple problems with AM stereo, but by far the biggest was receiver quality. I had a 1986 Z28 with a factory Delco AM stereo radio. Now, the AM stereo sounded fine on a $4,000 mod monitor in the studio, but paled considerably on my Delco radio. As far as I can tell, it sounded similar on
the vast majority of the AM Stereo receivers I tried. I have a few of them in storage somewhere. I am aware that there were some high-dollar system out there with spectacular performance, but they were rare and expensive. I still have a Sangean SR-66 walkman that I bought at an NAB show and it has pretty good AM stereo fidelity, but the FM still sounds better. In the end, it was the frequency response of AM that killed it, not the choice of which stereo system was selected. Be it Kahn or Motorola or the original Magnavox system, two channels of 4kHz audio is just 2x as bad as one.
Second, argument that AM stereo sounds as good or better than FM is moot, even if it were true. In the end, AM stereo came about 15 years too late to save AM. The die was cast when FM had superior performance at a low cost starting in the 1970s. By 1980, AM was already in a deep hole as a music medium. For AM hi-fi or stereo to have had an effect, it would have needed to be rolled out in the early 1970s to blunt the rise of FM stereo. The technology of the day made it expensive to build a hi-fi AM system, but even the cheapest of FM radios could sound good, so AM's undoing was partly a combination of lack of available, low cost, technology and starting much too late in the game. Perhaps if the FCC had been a little more farsighted and approved Kahn AM stereo in the early '60s, things would be better for AM now, but who can know for sure? Probably the technological cost of bringing Hi-Fi to AM in those days was already enough to doom the medium. Today, it could easily be a different story because new software defined radios can do things only dreamed about even 10 years ago.
For HD, the gain isn't in quality because analog FM and HD are pretty close. The HD gain is that it allows the broadcaster to offer more FM-quality local channels, for free, which benefits everyone.