213 . MELODIC IMPROVISATIONS BY SHIFTING FROM THE IONIAN MODE TO THE CELTIC MINOR TO THE INDIAN PENTATONIC AND TO THE GREEK PENTATONIC SCALE

For the next see post 204
The celtic 6-notes minor scale 2-2-3-2-2-1 is a subscale of the 7-notes diatonic scale 2-2-1-2-2-2-1

The Greek pentatonic (5-notes) scale 2-2-3-4-1  is a subscale of the Celtic 6-notes  minor scale.

But also the India or Egyptian pentatonic scale 2-2-3-2-3 is also a a subscale of  the 6-notes celtic minor

This allows for interesting improvisations shifting from 

1) Ionian more of diatonic 2-2-1-2-2-2-1

2) Celtic minor  2-2-3-2-2-1

3) Greek pentatonic 2-2-3-4-1

4) Indian pentatonic 2-2-3-2-3

where in all cases the 3 first notes and interval structure in semitones 2-2 remain stable