Go to http://rocksetta.com/rocksetta-music-shapes/ for the original music shapes with midi playable songs.
If the visual images of many songs melodies are arranged so that the songs pivots around A or A#. Then we can look at the similarities and differences between melodies without
getting confused by what key the song is in.
What I find interesting is that the starting note is not randomly throughout the Key but seems to concentrate around C, E, F, A, high C or High D#/Eb. Remember that the song seems to pivot around A or A# to make these observations.
B, C or High C songs pivoting around A#
E, F songs pivoting around A#
A or A# songs pivoting around A#
High D#/Eb songs pivoting around A#