HD Radio Background: HD radio is as unnecessary as it is cool. HD radio is supposed to have better sound quality relative to non-HD radios, though I can't quite pick up the difference. HD radio's key benefit is that it provides users with MORE access to their favorite local stations. "Huh?," you may say. Well, most of your local favorites also have other stations that are only available in HD (for example, 93.1 AND 93.12, etc.). While these 'extra' HD stations may thematically align with their terrestrial brethren, these other 'only available in HD' stations do not carry advertising...