John Lewis · 1949 · C major · AABA, 32 bars
A staircase: every tonic turns minor and becomes the ii of the key a whole tone below. Three keys in five bars, using one device over and over, and each step sounds inevitable.
Analyzed excerpt
Section: A1 · Bars 1–5
Cmaj7 | Cm7 F7 | Bbmaj7 | Bbm7 Eb7 | Abmaj7
This is a short excerpt quoted for analysis, not the full chart, and this composition is very likely still in copyright. Published versions and recordings disagree with each other about the rest of the tune, and often about these bars too.
Every one of these tunes is assembled out of the same handful of harmonic resources. Jazz Harmony is those resources, explained in the order in which they build on each other.
Read in C major, the key of the tune. Taken on its own, with nothing around it, this excerpt is just as easy to hear in Ab major — a few bars are often not enough to fix a tonic, and that ambiguity is a real property of the music rather than a gap in the analysis.
| Chord | Roman numeral | Function | What it is doing | Confidence |
|---|---|---|---|---|
| Cmaj7 | I | Tonic | Cmaj7 is the tonic of C. It is where the progression is at rest. | High |
| Cm7 | ii | Predominant | Cm7 is the ii chord of Bb: the classic predominant. It prepares the dominant and almost always moves to it. | High |
| F7 | V7 | Dominant | F7 is the dominant of Bb. Its third and seventh form a tritone, and that tritone is what makes the tonic feel due. | High |
| Bbmaj7 | I | Tonic | Bbmaj7 is the tonic of Bb. It is where the progression is at rest. | High |
| Bbm7 | ii | Predominant | Bbm7 is the ii chord of Ab: the classic predominant. It prepares the dominant and almost always moves to it. | High |
| Eb7 | V7 | Dominant | Eb7 is the dominant of Ab. Its third and seventh form a tritone, and that tritone is what makes the tonic feel due. | High |
| Abmaj7 | I | Tonic | Abmaj7 is the tonic of Ab. It is where the progression is at rest. | High |
Bars 2-3 are heard in Bb major: the harmony cadences there and stays long enough to become a key.
Bars 4-5 are heard in Ab major: the harmony cadences there and stays long enough to become a key.
A complete ii-V-I in Bb. Predominant, dominant, tonic: the sentence jazz harmony is built out of.
A complete ii-V-I in Ab. Predominant, dominant, tonic: the sentence jazz harmony is built out of.
High, medium and low next to each numeral are judgements about musical context, not probabilities. A low rating marks a bar that can honestly be read more than one way. How the ratings are decided →
Numbered against C major, the excerpt is I – ii – V7. Inside those 7 chords there is a complete ii-V-I. Take the roots away and keep the third and seventh. In F7 that is A and Eb. Those two notes decide where the progression is going, and hearing them move is worth more than naming the chords. Autumn Leaves, All The Things You Are and Tune Up use the same device, which is the argument for learning it once properly rather than three times by accident.
A compact form built from ii-V cadences that step downward by whole tone, each one complete, arriving in a new key and immediately preparing the next. It is essentially a study in the descending cadence chain, written by a composer with a strong formal education, and it is more tightly organised than most tunes of its period. Because every cadence resolves properly, it is an excellent piece for practising the vocabulary in several keys within one chorus.
John Lewis wrote it in 1949, before founding the Modern Jazz Quartet, and it was recorded that year by a group under Sacha Distel’s name in Paris. Lewis’s interest in classical form is audible in it, and the tune is often cited when his role in the MJQ’s more composed approach is being explained. It remains one of the few originals from that period that is played more for its structure than for its melody.
Open these chords in the analyzer and change them. Move one chord, substitute a dominant, take the ii away — the reading updates and tells you what you just did.
What this device is, and the other standards in the library that use it.
Read →Joseph Kosma · 1945 · B♭ major / G minor
Chord progression →Jerome Kern · 1939 · A♭ major
Chord progression →Miles Davis · 1953 · D major
Chord progression →The families every standard is assembled from, with examples from the library.
Read →