iyiyi said:
In spite of digital radio's current troubles, analog radio is dead for those reasons. Time for people to deal with the changes ahead!
I couldn't disagree more. It may make more sense to convert the analog sound waves we hear into digital form for transporting over broad data pipes like the internet, or encoding onto massive data structures like Blu-Ray or 4k digital projection units for movie houses. But for listening on the go, in the car, or in the office or on a portable, analog radio is still our best option.
In its current guises with FM stereo and AM limited to 10 kHz it may lack the wide dynamic range and quiet noise floor of a digital audio signal, but it manages to convey the analog sounds we hear with our analog ears well enough for most casual users. It's true that digital CAN improve this, and no doubt if we could have allocated an FM-like band to all-digital broadcasting with a sufficiently robust system we might be turning a page in history at this point.
But we didn't.
Radio insisted on keeping its valuable spectrum by not wanting to dilute things with "another band". That's a technical limitation that has forced us into this kludgy IBOC system we have, that, frankly, is impressive that it almost works at all.
So what's the lesson here? Yes, digital
can do better. But only with
sufficient bandwidth, which the FM & AM bands lack, which is why HD sounds so poor compared to the audio we get from movies and TV shows and even some internet streams these days. If only the 700 MHz spectrum was available a decade ago, radio could have had a great place to 'relocate' with sufficient spectrum to allow for us to migrate FM and AM together to equal footing on non-multiplexed/shared systems just like we have now. But who would actually support this? No one wants the added competition of equality…
The other lesson is that radio really screwed this one up. HD radio, as much as I want to love it, has been an evolutionary cul-de-sac for the industry. Because they were too afraid of having a "new digital" band to possibly compete with (one that, in all reality, could probably never be easily allocated with the spectrum resources of the 90s anyway) they wound up losing control of the battle completely, ceding the future to internet delivery via smartphones which mostly don't have radios in them at all in the US. By being protectionist and anti-competitive, radio has managed to lose the position as the controlling source of easy to obtain free music and information. It's now just another button on the virtual display in your dash board.
As it stands, analog FM and AM radio are our best bets for the medium. The so-called innovations of HD could be done in the analog domain, anyway: PAD data, tagging songs, improved fidelity through better processing at the studio & transmitter.