Key

              Diatonic (7 Note) Gregorian Scales
First, Choose a key:

 Cb = 7 flats Second, Choose a scale or mode

     
Gb = 6 flats      
Db = 5 flats                      
Ab = 4 flats     1 (Root) 2 3 4 5 6 7      
Eb = 3 flats     8 9 10 11 12 13 14    
Bb = 2 flats   These are the notes you can play in this key:      
F= 1 flat          
C = none                        
G = 1 sharp  

     
D = 2 sharps        
A = 3 sharps        
E = 4 sharps        
B = 5 sharps        
F# = 6 sharps        
C#= 7 sharps