Immigrant song chorus

[arthurhenry]

It's this isn't it?
A C# D D# E G G# A
Repeat in B and C, with the final run being C E F F# G A A# B C
Many seem to play it as major or mixolydian scales, incorrectly to my ears.
I may be wrong!

[peteb]

It is simply a major scale, running up from A to B to C...