For rock groove #9, I've combined the bass feels of two giants of rock: Ozzy Osbourne and Led Zeppelin. The first part of the groove is a set of absolutely straight pumping eighth notes...there's no swinging these puppies, they need to be even and rockin'! Think "Iron Man" to give you an example of the feel we're going for here.
Pay attention to the unison hits in bar 5, then going back to pumping eighth notes. In bar 17, we go to a half time reggae feel, again using a slide from the second to the major third. This groove seemingly has three different parts, and it's your job to make them all sound cohesive as a whole and make one groove out of the song.