====== A Taxonomy of Progressive Rock Forms ======


===== The ballad jam =====

Starts as as ballad and evolves into a jam. The jam is typically heavy. Often reprises the opening theme.

  * Trilogy
  * Thirty Years
  * Can Utility and the Coastliners
  * Take a Pebble

===== The extended ballad jam =====

Like the ballad jam but epic. The jam is definitely heavy.
  * Stairway to Heaven
  * Freebird
  * Starless

===== The suite =====

Lots of seemingly unrelated bits strung together. Can have explicit movements or not.
  * And You and I
  * Karn Evil Number 9
  * Supper's Ready

===== The instrumental =====

No words spoken.
  * where to begin ...

===== The drone =====

Typically instrumental. Literally a drone or drone via repetition.
  * Alaska (opening)
  * Aladdin's Bolero => or should there be a "The crescendo" class?