What is the best way to identify correctly if a song is in C major scale or A minor scale, because notes are all the same?

Question

What is the best way to identify correctly if a song is in C major scale or A minor scale, because notes are all the same?

In: Other

Answer 1

I mean, it kind of sounds like you have the sheet music for the piece in question (as how else would you know that the “notes are all the same” (i.e. no sharps or flats). In that situation, it should be pretty easy to find the tonic note; if it’s an A, the piece is in A minor, if it’s C then the piece is in C major.