Analyzing a Standard

Analyzing a standard means figuring out what the chords are doing, not just what they are. Instead of memorizing forty chord symbols as a random sequence, you learn to hear a handful of recurring gestures — ii–V–Is, pivots, turnarounds — strung together across a form. That’s the difference between reading a lead sheet one chord at a time and actually understanding a tune well enough to reharmonize it, transpose it on the spot, or improvise through it by ear.

Method: Key Center First, Chords Second

Start by finding the tonal center and its key signature, then label every chord with a Roman numeral relative to that key — uppercase for major and dominant quality, lowercase for minor. The payoff of Roman numerals is that they strip pitch away and leave pure function: a D minor chord is “just ii” in the key of C, but the same triad might be a borrowed modal interchange chord or a fragment of a secondary dominant target somewhere else. Once chords are labeled, group them into functional units — a ii and a V aren’t two separate events, they’re one gesture leaning toward a I chord — and note the harmonic rhythm, since a chord that lasts two bars invites different phrasing than one that flashes by in a beat. This is functional thinking: hear “a ii–V heading home,” not “Dm7, then G7.”

Worked Example: All the Things You Are

All the Things You Are is the textbook case for this kind of analysis because its very first eight bars pivot through two key centers. Laid out with Roman numerals:

All the Things You Are — first eight bars

Fm7

B♭m7

E♭7

A♭maj7

D♭maj7

Dm7G7

Cmaj7

𝄎

Top row: vi - ii - V - I in Ab major; bottom row: IV - ii V - I, the pivot to C major

The tune opens on vi (Fm7) and works through a ii–V–I in A♭ major, landing on A♭maj7 in bar 4. Bar 5’s D♭maj7 is still diatonic to A♭ (it’s the IV chord), but it also functions as the launching point for a brand-new ii–V–I in C major — Dm7–G7–Cmaj7 — which is a modulation hiding inside what looks like a routine four-bar phrase. Hearing this as “reach I in A♭, then pivot and reach I in C” rather than “six unrelated chords” is exactly the shift in perception analysis is meant to produce.

Secondary Dominants, Substitutions, and Borrowed Chords

Most standards complicate the plain diatonic picture with a handful of recurring devices, and part of analysis is learning to spot them fast:

Secondary Dominants — a dominant chord (V7/ii, V7/IV) that briefly tonicizes a chord other than the tonic, creating a miniature key center for a bar or two.
Tritone Substitution — a chromatic dominant substitute (♭II7 in place of V7) that shares the same tritone and resolves the same way but darkens the color.
The Backdoor ii-V — a iv–♭VII7 move (often borrowed from the parallel minor) that resolves to I from an unexpected direction.
Modal Interchange — chords lifted from the parallel minor or major key, common in bridges and endings.

Recognizing these isn’t just labeling — it tells you what scale choices and tensions are available, which is where analysis feeds directly into Chord-Scale Theory.

There Is No Single Correct Analysis

A given passage often supports more than one honest reading, especially around ambiguous key centers or enharmonic spellings, and jazz Roman numerals lean on function and voice-leading momentum rather than strict classical rules. The goal isn’t to find the “official” answer — it’s to find the analysis that’s most useful for what you’re doing, whether that’s memorizing the form, planning a reharmonization, or navigating turnarounds at the end of a chorus. Analysis is a tool for hearing standards as vehicles for improvisation, not a box you check once and move past.

♫ Listen

Charlie Parker & Dizzy Gillespie — “All the Things You Are” (1945): early bebop reading of the changes; listen for how Parker’s lines trace the A♭-to-C modulation and articulate the secondary-dominant motion in real time.
Cannonball Adderley — “Autumn Leaves” (Somethin’ Else, 1958, with Miles Davis): a hard-bop masterclass in the relative major/minor ii–V pairing that defines Autumn Leaves; listen for how the soloists lean into the shift between the two key centers each phrase.