Does this indicate that, when you count backwards to grab a ‘tone-Pitch’, below ‘Tonic, you enter into a different ( flat ) key?
C, Db, Eb, F, G, Ab, Bb,-C- D, E, F, G, A, B, C.
8/1,2,3,4,5,6,7, ’1′, 2,3,4,5,6,7,8/1
No.
I can see some logic in the numbered form on the last line of your question, but not sure how you are making that conclusion?
We number (diatonic) scale degrees from 1 to 7. So in the key of C the notes and their associated numbers will be…
C(1), D(2), E(3), F(4), G(5), A(6), B(7).
That never changes. No matter what direction you go, 7 will always be “B”; 6 will always be “A” and so on… in the key of C that is.
In another key, the order of scale degrees will remain the same but the notes will change. E.g., key of G …
G(1), A(2), B(3), C(4), D(5), E(6), F#(7).
The reason I ask is this concept of ‘finding the ‘Parent Major Scale ( PMS )…The second mode is Dorian. To figure out the Parent Major Scale (PMS) of C Dorian you have to ask “C is the second note of what major scale?”. The answer lies in our old Major Scale Equation: T T S T T T S – From that you should know that the second note of the Major Scale is one tone higher than the root note. To work out the mode we are doing it backwards…
C is the second note of (count back one tone)…. Bb Major Scale 🙂 .