Chicago by Fred Fisher

Overview

Key: E♭ major · Chords used: 13 · Sections: 2

Form: A Section → B Section

Where these chords come from: a chord chart of this song written by a musician and shared on the iReal Pro forums, archived in the iReal Pro forum charts archived in ChoCo (de Berardinis et al., 2023). It's one musician's reading of the song, not a transcription checked against the recording. This page shows that chart as-is: the analysis below is generated directly from it by code, not written by AI. Consecutive repeats of a chord are shown once, and the piano voicings are our playable arrangement of each chord symbol, not a note-for-note transcription.

Section by section

A Section

• E♭ – G♭dim
  I – biii°
• Fm7 – B♭7 (×3)
  ii7 – V7
• E♭ – B♭7 – E♭ – F7
  I – V7 – I – II7
• Fm7 – B♭7 (×2)
  ii7 – V7
• E♭/G – G♭dim – Fm7 – B♭7
  I⁶ – biii° – ii7 – V7

B Section

• E♭ – G♭dim
  I – biii°
• Fm7 – B♭7 (×2)
  ii7 – V7
• Dm7♭5 – G7 – Cm7 – C7 – Fm – A♭m – E♭ – G♭dim – Fm7 – B♭7 – E♭ – E♭dim – Fm7 – B♭7
  viiø7 – III7 – vi7 – VI7 – ii – iv – I – biii° – ii7 – V7 – I – i° – ii7 – V7

Chord vocabulary

Chord	Roman numeral	Role	Heard in
E♭	I	Home chord (tonic)	A Section, B Section
G♭dim	biii°	Outside the key (chromatic)	A Section, B Section
Fm7	ii7	In the key	A Section, B Section
B♭7	V7	In the key	A Section, B Section
F7	II7	Outside the key (chromatic)	A Section
E♭/G	I⁶	Home chord (tonic)	A Section
Dm7♭5	viiø7	In the key	B Section
G7	III7	Secondary dominant (V/vi)	B Section
Cm7	vi7	In the key	B Section
C7	VI7	Secondary dominant (V/ii)	B Section
Fm	ii	In the key	B Section
A♭m	iv	Borrowed from E♭ minor	B Section
E♭dim	i°	Outside the key (chromatic)	B Section

Harmonic highlights

• A♭m (iv) is borrowed from the parallel key, E♭ minor.
• G7 acts as V/vi: it resolves to Cm7.
• C7 acts as V/ii: it resolves to Fm.

Sources & accuracy

• Chords: the iReal Pro forum charts archived in ChoCo (de Berardinis et al., 2023). Community chord chart “Chicago - www.tradjazz.ru 1” (credited “Fisher Fred”, style Medium Swing) from the forum file linked here, CC BY 4.0 via ChoCo. Artist as credited on the chart.
• Section names: from the chart's own markings: section names written on the chart (Intro, Verse, Chorus…) are kept, and rehearsal letters are shown as “A Section”, “B Section” and so on (the B of an AABA song is called the Bridge).
• Cross-check: the iReal Pro forum charts archived in ChoCo (de Berardinis et al., 2023). Community chord chart “Chicago - www.tradjazz.ru” (credited “Fisher Fred”, style Medium Swing) from the forum file linked here, CC BY 4.0 via ChoCo. Artist as credited on the chart. A separately posted chart of the same song; its chords match this page's closely when both are read in the same key (similarity 87%).
• Chord charts are often written in a key that suits a particular singer or band, so this may not be the key of the original recording.
• Verified: two community charts of this song, posted in different forum threads, agree on its harmony. They're still charts, not transcriptions checked against the recording.
• Rhythm and chord durations aren't shown; each step is one chord change.