Gospel Quick-Change I-I7-IV-I
Piano sound loads on first tap. Resolved in the key of C — every chord links to its full analysis.
The move blues and gospel players call the 'quick change': turning the tonic into a dominant seventh (I7) so it pulls, like a secondary dominant, straight into the subdominant (IV) — a one-bar tonicization that shows up as early as bar 2 of a blues chorus.
What each degree does
Feels like home — complete rest, where the piece departs from and returns to. The major tonic, where everything settles.
The tonic turned dominant — adding a minor 7th makes I the V OF IV, tonicising the subdominant. That blues-and-gospel turn that pushes toward IV.
A step out from home into the light — the subdominant. It sets up the dominant or resolves with a plagal ('amen') colour, opening space without sharp tension.
Feels like home — complete rest, where the piece departs from and returns to. The major tonic, where everything settles.