Intros and Endings · Jazz Wiki

A lead sheet tells you the changes to the head — it says nothing about how a band walks onto the tune or walks off it. Every performance needs a frame: something that sets key, tempo, and mood before anyone plays the melody, and something that tells the audience (and the drummer) “this is over now.” Intros and endings are that frame, and they’re built from a small, reusable toolkit that every working musician carries around.

Why the frame has to be arranged, not read

A written chart usually starts at the head and stops at the last bar of the form — the boundary material is either scribbled in the margin, called out verbally, or simply known by convention. That’s because an intro’s job (establish tempo and tonality) and an ending’s job (signal closure) are performance problems, not composition problems, so they get solved on the bandstand rather than on the page. A count-off and four bars of comping is a perfectly legitimate intro; elaborate arranged intros are a choice, not a requirement, and the same is true of endings — a tag or vamp only works if the band has agreed on it or someone cues it, since nothing about “ending” is self-evident from a lead sheet alone.

Intro devices: how a band gets in

The simplest intro just borrows harmony that’s already in the tune, most often the last four or eight bars of the form, so the band arrives at the top of the head having already established the key. A step up from that is a turnaround vamp, repeated two to four times to lock in tempo before the melody enters:

Cmaj7 – A7(alt) – Dm7 – G7 (last-4 vamp, repeated 2–4x)

Voiced as block chords, the vamp looks like this:

For tunes with static or modal harmony — and for most bossa novas — the intro is often just the first chord of the tune, held as a pedal while the rhythm section sets the groove:

Cmaj7 – Cmaj7 – Cmaj7 – Cmaj7, walking bass or clave underneath

Miles Davis’s “So What” opens this way in spirit but takes it further: Bill Evans and Paul Chambers play a rubato, composed piano-and-bass intro built on quartal, ambiguous voicings that never quite state the tonic clearly, so the modal head feels like it’s emerging out of a fog rather than being announced. A dominant pedal works the same structural trick with more tension, holding G7 (or G7sus) under shifting upper voicings until the band locks into the groove and the head begins.

Ending devices: how a band gets out

The most common ending is the tag: take the last phrase of the head, usually two bars, and repeat it two or three times before landing on a final turnaround and tonic.

Repeat the final 2-bar phrase 3x
Then: Dm7 – G7 – Cmaj7 (turnaround into tonic)

Count Basie turned the tag into theater on “April in Paris”: the band plays the closing phrase, appears to stop dead, and Basie shouts “One more time!” — the rhythm section restarts the tag, and the fake-out repeats two or three times before the real final chord lands. That kind of interactive tag depends entirely on a cue (verbal, gestural, or eye contact); nobody can improvise a Basie ending without the band already knowing the game.

Other standard closes:

♭II7–I cadence — D♭7(♯11) → Cmaj7, a tritone substitute dominant that voice-leads by half step into the tonic (D♭→C, F→E, A♭→G, C♭→B) for a colorful, modern-sounding cadence

Each voice steps down by half step (the C♭ simply respells as B, a common tone):

Maj7(♯11) with fermata — hold Cmaj7(♯11): C–E–G–B–F♯, no pickup, let it ring
Vamp-and-fade — Cmaj7 – Am7 – Dm7 – G7 repeated while soloists trade flourishes, common on records that fade out
Unison hit — the whole ensemble strikes one final voicing together and stops cold, a staple of big-band charts and up-tempo bebop

The rhythm section carries the frame

Underneath any of these devices, the bass is doing the real structural work. A walking quarter-note line is the default for intros and vamps, but tunes that want an exotic or non-Western color use a syncopated ostinato instead — Dizzy Gillespie’s “A Night in Tunisia” opens on exactly this kind of vamped bass figure, its Latin-inflected rhythm setting the tune’s mood well before the melody’s famous interval leap arrives. This is also where Vamps and Ostinatos and Stop-Time textures live: both are ways of using the rhythm section, not the harmony, to mark a structural boundary. A drummer’s fill or break often does the same job in miniature, punctuating the handoff from intro to head or from solos back into the chorus.

♫ Listen

Miles Davis — “So What” (Kind of Blue, 1959): the first thirty seconds are a rubato, composed piano-and-bass intro by Bill Evans and Paul Chambers — ambiguous modal voicings that dissolve into the walking-bass head.
Count Basie — “April in Paris” (April in Paris, 1955): listen for the fake ending — the band stops, Basie shouts “One more time!,” and the tag repeats before the final chord actually lands.
Dizzy Gillespie — “A Night in Tunisia” (1946, RCA Victor): the syncopated, non-walking bass vamp that opens the tune is a model for how rhythm alone can set a mood before any melody is played.