The head Foo Fighter traced through his personal and professional history and the musical connection throughout, starting with a 1975 K-Tel compilation album that featured the Edgar Winter Group's "Frankenstein."

"It was a riff; I gave it all up for a f**king riff," said Grohl. "Interestingly enough, though, that song is completely instrumental; there's no vocal. It's drums, guitars, keyboards, percussion � each getting a solo in the song. No vocals. But what I heard in all of those solos were voices � the voices of each musician: their personalities, their technique, their feel � the sound of people playing music with other people. It made me want to play music with other people, too."