What made Kurt Cobain/Nirvana so revolutionary in the sub cultural popularity

Nirvana was the band that took all those influences from the late '80s and turned it into a movement. Suddenly everyone was listening to and buying the sound of real bands playing music, and that was incredibly inspiring to a band like Better Than Ezra touring around the South in our van.

Hopes this helps!

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)