The re-working of the harmonic patterns reveals a striking difference in perception. The I IV V IV harmonic progression, so common in Cuban music, is heard in pop music all across the African continent, thanks to the influence of Cuban music. Those chords move in accordance with the basic tenets of Western music theory. However, as Gerhard Kubik points out, performers of African popular music do not necessarily perceive these progressions in the same way: "The harmonic cycle of C-F-G-F [I-IV-V-IV] prominent in Congo/Zaire popular music simply cannot be defined as a progression from tonic to subdominant to dominant and back to subdominant (on which it ends) because in the performer's appreciation they are of equal status, and not in any hierarchical order as in Western music."