At least on the AM side, HD (IBOC) is a disaster... A TOTAL disaster. The old C-QuAM/Motorola AM Stereo was worlds better than this failed experiment, which creates massive interference to adjacent stations and reduces the audio response on AM to that of a phone line. Add the fact that you almost have to *see* the towers to get a lock in HD mode on all but the biggest blowtorch stations. AM HD is so bad that there has actually been an increasing number of stations going to AM stereo while HD continues to lose stations.
I accept the fact that our current FCC aren't the sharpest tools in the shed, but if it wasn't for the money and politics involved, HD/IBOC on AM would have been a footnote in radio history years ago. The interference potential was foretold years before the FCC approved it's use. What they don't seem to get through their thick heads is that AM HD will *never* work, because of the inherent noise floor on the AM band. Analog is still usable even with the noise while HD can't lock if there is interference. Extreme FAIL!
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