Best methods for mixing:
- Same number, same letter
- Same number, different letter This is the absolute best method for mixing compatibility for a tonal shift
- Same letter, 1 difference in number (+1/-1)
Other Methods (less reliable but still useful at times):
- Semitone Shift (+7 number, same letter)
- Full tone shift (+/- 2 number, same letter)
- Compatible tone shift: -3 number, different letter
- Diagonal switch (+/- 1 number, different letter
All this is due to the overlap in notes within the respective scales.
Most of this is also dependent on the tracks being played and their notes.