21 Pentatonics In Each Key There are 21 pentatonics in each diatonic scale. It follows then that there are the same number for any hepatonic [7 note] scale. Below are the permutations. We can create a hepatonic scale using any 7 notes. Some will be quite odd no doubt. I suggest starting with the 1st 3 positions of the guitar: open, 1st/2nd [contingent on key], 3rd/4th [contingent on key]. If we are considering the diatonic scale, which is a specific hepatonic scale [see The Hills Are Alive With The Sound Of Music...] then perhaps start with the keys of C or G major. Personally I'd suggest that your consideration begin with the key of D major as it plots several beautiful patterns in the first 7 frets, some being very fast to finger. So the 21 Pentatonics... 1>12345 2>12346* 3>12347 4>12356* 5>12357* 6>12367 7>12456* 8>12457* 9>12467* 10>12567 11>13456** 12>13457 13>13467* 14>13567** 15>14567 16>72345 17>72346** 18>72356* 19>72456** 20>73456 21>23456* In the key of D Major: DEF#GABC#D I found that the ones above with * to be very playable: and the ones with **'s to be very interesting to my ears MM My Websites: 110 MB of free acoustic guitar downloads:`fingerstyle`slide`altered tunings. https://homepage.mac.com/rpeikoff/FileSharing14.html ~bio~photos~guitars~tunings~mp3s~cds. https://www.muktimusic.com