Dave Grohl says that when recording the Foo Fighters' new album he explored the "regional relevance of music".
Travelling to various cities in America to record tracks for 'Sonic Highways', the singer tried to explore the history of each area in the process.
He explained: "Basically, the process is we come to a city and we spend a week and we start recording an instrumental, because I interview all of these different musicians from that city.
"I talk about the regional relevance of the music from that city, the cultural influence, that 'made-for-the-sound' of the music.
"There's no way that you can tell the history of a city's music in one hour, so we have to do it in a way that relates to the band and goes from point A to point B and becomes a song."
In an extended trailer for the TV series filmed during the series he says: "I thought rather than just go into a studio and make another record, we could go all over the country and make a record where each song was recorded in a different studio."
A number of famous faces also appear on the show to jam with the rockers and discuss their hometowns, including Pharrell Williams, Dolly Parton and Willie Nelson.
Each episode of the eight-parter will feature a new city and song, and ends with a performance of that specific tune.
"Mostly we wanted to pick cities that meant something to us." said Dave's bandmate Pat Smear.
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