Maceo Parker’s blue notes in a James Brown classic

I got interested in tuning theory because of the blues. The first instrument I learned to play well was the harmonica, and an essential part of blues harmonica is bending notes to make them go flat. The same is true for blues guitar, though there you are bending notes sharp rather than flat. For several …

The minor key universe

In a previous post, I suggested that we think of an expanded major key universe that includes the major scale, Mixolydian mode, Lydian mode, and maybe also Mixolydian b6. In this post, I present a similar approach to minor keys, by extending the logic of Western European tonal theory to cover some additional minor scale …

Identifying tritone substitutions

This is one of those jazz theory ideas that gets explained endlessly online and in texts and is relatively rare in a typical American’s listening experience. But when you do hear it, it does sound cool. I made an interactive explainer, because as with so many jazz theory concepts, tritone substitutions make more sense when …

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 …