Watch the Flat the 6th online guitar lesson by Kenny Wessel from Shades of Jazz
The first altered pentatonic we'll look at is the major pentatonic with a b6. If we start with an Eb major pentatonic scale (Eb, F, G, Bb, C), we can alter it, in this case, by lowering the 6th (C) by a half step. The pitches now are Eb, F, G, Bb, B. This new scale has a root, 2, 3, 5 and b6 (or b13) and we can refer to it as an Eb major b6 pentatonic scale. We can use this scale over an Eb7 chord and get a b13 to use as a color, but in the next section we'll explore an even more interesting application for this new mode.