exploring modes via pentatonics

OK, so if you've been reading this blog I understand that at this point you're rolling your eyes and emitting some form of loud "arrgh!" at the thought of yet another post dealing with pentatonic scales. Well, that's just how cool and useful I think they are, so here goes.

Let's say you have a Dmin7 chord that you're going to play over (or even write a melody over, etc). By using pentatonic scales you can elicit the colors of certain modes, and can do so by using your own and perhaps already copious supply of pentatonic licks.

The pentatonics that can easily be used are the following: start with the pentatonic with with the same root, in this case D minor. We can use the pentatonics which are 2 "clicks" both clock and counter-clockwise on the circle of fifths:

C | G | D | A | E

Each pentatonic scale, when combined with the underlying chord, corresponds to one or more modes. For example, if we take an E minor pentatonic scale (e, g, a, b, d) and play that over a Dmin7 chord (d, f, a, c) our resulting conglomeration of tones will be:

d, e, f, g, a, b, c

aka the dorian mode.

Starting with the pentatonic 2 clicks to the left and moving to the right (or clockwise on the circle of fifths) we can generalize the mode relationships as:


The reason that there can be more than one mode hinted at is because not all 7 tones of a scale are present in those situations. E.g. if we play a D minor pentatonic (d, f, g, a, c) over a Dmin7 chord (d, f, a, c) we only have five tones:

d, f, g, a, c

and without knowing what the 2nd (some kinda e) and 6th (some kinda b) are we can't tell what the mode is with complete precision. For instance, if there were an eb and a b natural we would end up with a complete dorian flat-2 (or flat-9), the second mode of the c melodic minor scale.

That is how the minor pentatonics will work over minor chords. In some future post we'll explore how they work over major chords.