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Foo Fighters fans are getting their first taste of the band's upcoming HBO documentary series.  The network unveiled a teaser this weekend, which features frontman Dave Grohl explaining where they got the title, "Sonic Highways." 

The series follows Grohl and the band as they record the new Foo Fighters album in eight different cities around the country.  And in addition to spending time in eight iconic recording studios, they also explore what gives each city its musical character.  "Sonic Highways" and the still-untitled Foo Fighters album are both due out in the fall.