Today we have two video lessons, either of which is a good introduction to a pretty simple notion, which I sometimes like to call the “melody machine.” With this, I’m not suggesting some big new original conception. On the contrary, the concept I’m calling the melody machine is about as old as music itself.
If that nickname sounds a little gimmicky, it’s really not meant to be. I actually do call this device a “melody machine,” in my own thinking, part of an ongoing process of internalizing my favorite composition devices. Also, it’s fun to say, just like saying “Lollapalooza” or “Isn’t she pleasant?”
In a nutshell, this lesson shows you certain ways of using an underlying chord progression as a “thought generator” for creating melodic material.
How to Riff on Van Morrison’s Moondance – Part 1
And this related tutorial is from my Blues Piano Crash Course