How do you modulate from a major to C major?
The smoothest way to modulate from one key to another is to use a pivot chord. A pivot chord is a chord that both keys share in common. For example C major and G major share four chords in common: C, Em, G, and Am.
How do you modulate when composing?
How to apply (diatonic or altered) common chord modulation:
- Establish a tonal center (home key) through a progression, cadence, or static harmony.
- When you are ready to modulate, use your diatonic/altered common chord to pivot into destination key.
- Confirm the new key with a cadence.