Solar

“Solar” looks like a blues — twelve bars, medium swing, minor-key mood — but it isn’t one. It’s a compressed harmonic machine: a chain of ii-V-I cells dropping from C minor through F major and E♭ major into D♭ major before snapping back home. Few tunes pack this much functional motion into so little real estate, which is why it’s one of the first pieces most players use to hear a Harmonic Sequence in action.

A Sequence Disguised as a Blues

Call it Solar’s central trick: it borrows the length of The 12-Bar Blues but none of its harmonic content. A real blues sits on I–IV–V in one key; Solar instead treats each phrase as its own miniature key area, arriving via a ii-V and then sliding down to start the next one — and the key areas shrink from four bars to two as the form goes on, so the changes come twice as fast by the end. That’s a textbook Harmonic Sequence — the same melodic-harmonic shape restated at a new pitch level — and it’s worth analyzing precisely because the pattern is so audible: once your ear catches the first ii-V-I, the rest of the form basically predicts itself.

The Changes, Bar by Bar

• Bars 1–2: Cm(maj7) — establishes the home minor key
• Bars 3–4: Gm7 – C7 — ii-V pointing at F major
• Bars 5–6: Fmaj7 — arrival in F
• Bars 7–8: Fm7 – B♭7 — ii-V pointing at E♭
• Bar 9: E♭maj7 — arrival, a whole step down from F
• Bar 10: E♭m7 – A♭7 — ii-V pointing at D♭
• Bar 11: D♭maj7 — arrival, another whole step down
• Bar 12: Dm7♭5 – G7♭9 — a minor ii-V resolving back to Cm(maj7) at bar 1

Here are those twelve bars as arpeggiated chord tones, first the turn through F (bars 1–6):

and then the descent through E♭ and D♭ back home (bars 7–12):

Notice the arrival points: C, F, E♭, D♭. After the opening leap to F, each new tonic lands a whole step lower, so the ear hears the same shape restated down the scale — the essence of a sequence, and quite different from a normal modulating tune that establishes each new key at length. Each cell is functionally self-contained, so the whole piece can be understood as ii-V-I Vocabulary strung end to end rather than as one long key.

A Minor Tonic With a Major-Seventh Twist

The opening chord, Cm(maj7), is the form’s signature color: a Minor-Major Seventh Chord whose raised seventh (B natural against the C-E♭-G triad) gives it a darker, more unresolved quality than a plain Cm7. That choice matters for how you hear the whole tune’s tonality — it commits to Minor Key Harmony from the first beat rather than treating C minor as just a passing stop, and it sets up the final Dm7♭5–G7♭9 minor ii-V (bar 8) as a real cadence back into that color, not a generic dominant resolution. Working out clean Guide Tone Lines through these four key areas — tracking the third and seventh of each chord as they slide down by step — is one of the most efficient ways to internalize the form.

Whose Tune Is This, Really

Miles Davis recorded “Solar” once, on April 3, 1954, with Dave Schildkraut, Horace Silver, Percy Heath, and Kenny Clarke, for the sessions that became Walkin’. He copyrighted it under his own name, and the opening bars are engraved on his tombstone. But the composition traces back to guitarist Chuck Wayne, who wrote it in 1946 under the title “Sonny”; Davis’s main change was flattening that opening chord from major to minor, deepening its mood. It’s a good reminder that authorship in this repertoire is often murkier than the copyright page suggests — worth keeping in mind whenever you treat a lead sheet as gospel, and a useful case study alongside outright Contrafacts, where a new melody is openly built over borrowed changes.

♫ Listen

• Miles Davis — “Solar” (Walkin’, 1954): Davis’s muted trumpet states the melody plainly against Horace Silver’s spare comping; follow how cleanly the rhythm section marks each new key area every two bars, and how the closing G7♭9 snaps back to Cm(maj7) at the top.
• Bill Evans Trio — “Solar” (Sunday at the Village Vanguard, live June 25, 1961): Evans and Scott LaFaro trade the harmonic motion back and forth in real time; listen for how far Evans reaches into upper extensions on each arrival chord, treating the form as a chance for reharmonization rather than a fixed script — a good next step once you’ve got the raw changes under your fingers and are ready to focus on Playing the Changes and Turnarounds beyond the written form.

Related: Jazz Standards as Vehicles, Blues Harmony