Bass Lessons - Basic 12 Bar Blues In A - The Walking Bass Bass Tab - BLUES - Basic 12 Bar Blues in A - the Walking Bass by: Chunky C This just so happens to be done in the key of A but you can play this in any key you like by following the same pattern for the chosen key. Building Your Own Jazz Bass Lines Overview & Purpose The purpose of this presentation is to learn how to create bass lines from a set of chord changes. Eventually, I was able to come up with a walking bass and rhythm at the same time. This is the pattern of scale degrees 1 2 3 5 applied to the C Dorian scale. So for an ascending line over the Cm7 I can play C D Eb G. So Cm7 to F7 is movement by 4th because we have the root notes moving from C to F. In this lesson I’ll demonstrate how I approach playing walking bass lines and chords at the same time. The function of the bass is to provide the foundation for the harmony of the given tune. Walking Bass for Jazz and Blues is a complete method to help beginners master each element of Blues and Jazz walking bass.