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Travelling to a Different Musical Universe: C to E♭
When you change keys (modulate) from C major to E♭ major, you take the music to a different musical universe, a parallel musical universe pitched three semitones away.
- It’s a parallel musical universe because, as you can see in Table 24, the E♭ major scale uses the same interval order as the C major scale:
- But it’s a different musical universe, because every note of the E♭ major scale is pitched three semitones away from its counterpart in the C major scale.
It’s as though you’re playing your guitar without a capo and singin’ a tune in the key of C major, and then, part way through the tune, exactly when you want it to happen, a capo magically clamps down on the third fret (while you continue playing chords in the key of C), changing the key to E♭ major.