The twelve bar blues

This week in the Song Factory, we begin talking about the conventions of the blues. One central convention is the twelve-bar form. It’s so closely associated with the blues generally that jazz musicians use the term “a blues” to mean any tune using the twelve-bar form. However, it is surprisingly difficult to define what the …

Led Zeppelin and the folkloric integrity of the blues

There is a fascinating moment in “When The Levee Breaks” by Led Zeppelin where Robert Plant plays a very flat ninth on the harmonica. I love this note, because there is so much music theory and history encoded within it. Listen at 0:41. Before we can get into the details of this note and what …