+ 2 Tones to the Em/G Major Pentatonic
The E minor Pentatonic/G Major Pentatonic [E-G-A-B-D] is a 5 tone scale. Music which is key-based typically uses scales with 7 [heptatonic]. So, let’s add two [using scale starting from the E in a general sense]…
- + C and F natural, we get E-F-G-A-B-C-D, which is the key of C Major.
- + C and F#, we get E-F#-G-A-B-C-D, which is the key of G Major.
- + C# and F#, we get E-F#-G-A-B-C#-D, which is the key of D Major.
One thing this tells us is that Em/G pentatonic works as a scale choice for soloing in C, G, & D, since E-G-A-B-D are common to all of them. It can be viewed this way: on the circle of 5ths, for any 3 adjacent keys, the one in the middle’s m/M pentatonic scale can be used for itself and the key on each side of it.
These different scale types can be called modes.