“Though support for the feature was added to iTunes 7.4, iTunes Tagging remains one of the least-understood expansions of the iPod ecosystem—arguably, for good reason,” Jeremy Horwitz reports for iLounge.
“Developed by Apple and implemented in new iPod speaker systems by companies such as Polk Audio and JBL, iTunes Tagging enables an HD Radio tuner to record information about the currently playing track, save it to an iPod, and let the iPod’s user easily find that track in the iTunes Store for purchase,” Horwitz reports.
Horwitz takes a look at how iTunes Tagging works with Polk Audio’s new i-Sonic ES2, iTunes 7.6, and an iPod classic and explains, “Ultimately, iTunes Tagging’s obscurity is likely attributable to the high prices of HD Radio tuners, the lack of iPod family-wide compatibility, and the fact that the feature sidesteps what people would actually want—the ability to use iPods’ recording features to actually store songs—in favor of storing tags and pushing people towards purchases of iTunes Store music. But if this feature is something that interests you, it does work, albeit with a few small kinks. “
Full article here.