Saxophonist Pascal asked an excellent question concerning how to play by ear in different keys:
“Regarding exercises involving arpeggios, inversions, or scales on saxophone: When using movable DO, should I think of each tonality as if it were C Major? For example, when I play in E major, do I think, “DO RE MI FA SO LA TI DO”? Is it as if there were only one Major scale on each starting key? This is a revelation for me!”
Good question, Pascal. A major scale has the same specific form, regardless of which note is chosen to be DO. Here is that form shown as a schematic and on the piano keyboard:
