I+ roman degree

The augmented tonic — the 5th is raised, creating an inner voice that climbs chromatically. Home set in a bright tension on the way back to stability.

Where it lives

0semitones from the tonic

Major mode

augmented

Hear it in context: I-I+-IV-V

I Cmaj

I+ Caug

IV Fmaj

V G7

Piano sound loads on first tap. Resolved in the key of C — every chord links to its full analysis.

Progressions that use it

I-I+-IV-V I-I+-IV-vi