I have just learned that every major key has its own "relative" minor key. And the corresponding minor key for G major is E minor. Does that mean that "Prelude in E minor" can be written as "Prelude in G major"?

If that's the case, since a major key usually correspond to a happy tone. Shouldn't "Prelude in G major" a happy song, which, by default, makes "Prelude in E minor" a happy song?

I'm so confused.

  • The G major and E minor scales use the same notes, but they serve different purposes in the two keys. In E minor, the E note is "home", and the note you want to resolve on. You'll see chord progressions and melodies that go back to E, eventually. In G major, you'll eventually want to go back to G, instead. – Robby Goetschalckx Sep 11 '20 at 22:53

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