Thelonious Monk · 1944 · F major · AABA, 32 bars
Two chords a semitone apart, alternating, for the whole A section. Neither resolves to the other and neither is a passing chord — Monk simply put a tritone substitute next to its own target and left them there.
Analyzed excerpt
Section: A1 · Bars 1–8
F7 | Gb7 | F7 | Gb7 | F7 | Gb7 | F7 | Gb7
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 F major, the key of the tune. Taken on its own, with nothing around it, this excerpt is just as easy to hear in Bb 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 |
|---|---|---|---|---|
| F7 | I7 | Tonic | F7 is the tonic, but built as a dominant seventh — the sound that defines the blues. The tonic keeps a b7 and stays at home anyway. | High |
| Gb7 | subV7 | Dominant | Gb7 is a tritone substitute for the dominant. It shares its tritone with C7 and slides down a semitone into F. | High |
| F7 | I7 | Tonic | F7 is the tonic, but built as a dominant seventh — the sound that defines the blues. The tonic keeps a b7 and stays at home anyway. | High |
| Gb7 | subV7 | Dominant | Gb7 is a tritone substitute for the dominant. It shares its tritone with C7 and slides down a semitone into F. | High |
| F7 | I7 | Tonic | F7 is the tonic, but built as a dominant seventh — the sound that defines the blues. The tonic keeps a b7 and stays at home anyway. | High |
| Gb7 | subV7 | Dominant | Gb7 is a tritone substitute for the dominant. It shares its tritone with C7 and slides down a semitone into F. | High |
| F7 | I7 | Tonic | F7 is the tonic, but built as a dominant seventh — the sound that defines the blues. The tonic keeps a b7 and stays at home anyway. | High |
| Gb7 | subV7 | Dominant | Gb7 is a tritone substitute for the dominant. It shares its tritone with C7 and slides down a semitone into F. | Medium |
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 →
Against a tonic of F major the passage numbers as I7 – subV7. Inside those 8 chords there is a tritone substitute. Strip it to two notes per chord, the third and the seventh, and play it under tempo. F7 gives you A and Eb; follow that pair from chord to chord and the voice leading becomes audible in a way the root motion never makes it. Once you can hear it here, it is hard to miss in Blues for Alice, All Blues and So What.
The A sections alternate between the tonic and a chord a semitone above it, shifting back and forth without either one being prepared — parallel motion rather than functional harmony. The bridge is more famous still: a series of dominant chords moving in parallel up and then back down by semitone, which resolves nothing and is meant to resolve nothing. There is a well-known discrepancy between the published chart and what its composer actually played, so the bridge exists in two circulating versions.
Monk wrote it in 1944 and recorded it repeatedly. Miles Davis recorded it in 1954 at the session where he and Monk reportedly disagreed about accompaniment, an incident that has been retold so often it has become part of the tune’s biography. The parallel bridge is one of the clearest early examples of harmony used as sound rather than as function.
Load the progression and start altering it. Every edit is re-read from scratch, so you can test a hunch about one chord without rewriting the rest.
What this device is, and the other standards in the library that use it.
Read →Charlie Parker · 1951 · F major
Chord progression →Miles Davis · 1959 · G major
Chord progression →Miles Davis · 1959 · D dorian / E♭ dorian
Chord progression →The families every standard is assembled from, with examples from the library.
Read →