I roman degree

Feels like home — complete rest, where the piece departs from and returns to. The major tonic, where everything settles.

Where it lives

0semitones from the tonic

Major mode

major triad

Hear it in context: Perfect Authentic Cadence

I Cmaj

IV Fmaj

V G7

I Cmaj

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

Progressions that use it

Perfect Authentic Cadence Pop Axis Progression '50s Doo-Wop Progression Passamezzo Moderno I-IV-V-IV I-V-IV-V I-IV-vi-V Rock Plagal Turnback I-iii-vi-IV Minor-Start Authentic Cadence IV-I-V-vi I-IV-vi-IV Lydian Vamp I-Vsus-V-IV I-IVsus-IV-V ii–V–I Jazz Turnaround Rhythm Changes Turnaround ii-V-I-IV I-IV-ii-V I-V-vi-iii vi-IV-I-V I-iii-IV-V I-vi-IV-ii ii-Vsus-V-I I-Isus-IV-V I-iisus-ii-V I-I+-IV-V I-V+-vi-IV Secondary Dominant (V of ii)Secondary Dominant (V of vi)Secondary Dominant (V of V)Gospel Quick-Change Minor Plagal Cadence The Borrowed iv (Modal Mixture)Relative-Minor Secondary Dominant (V of V)Tonicized-vi Turnaround ii-V-I-IV7 I-IV-V-iii Extended ii–V–I (with vi)Tritone Substitution Turnaround Mixolydian Vamp Descending Major Tetrachord I-bIII-bVII-IV I-IVsus-Vsus-I I-I+-IV-vi I-III+-vi-V I-#ivo-V-I I-#io-ii-V Ragtime Circle of Fifths Barbershop Turnaround I-III-vi-IV Epic Borrowed Cadence Backdoor Cadence Coltrane 'Giant Steps' Cell Coltrane Changes (Bare Cycle)