The Foo Fighters' "Sonic Highways" (Roswell/RCA) project is much more than an album. It's like a doctoral thesis that rocks.
The companion series on HBO, which was directed by singer- drummer-guitarist Dave Grohl, traces the process of recording the album in music hot spots around the country. Each of the album's eight songs was recorded in a different city, with local artists involved and, theoretically, the local flavor...
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