PianoChords.studio

Back at One by Brian McKnight

Piano chords, voicings & structure breakdown · 50 steps · 25 unique chords · 2000s

Community chart. These chords come from a chart a musician wrote and shared on the iReal Pro forums, not from a transcription checked against the recording. Charts are sometimes written in a different key or simplified, and no second chart of this song agreed closely enough to mark this page verified. Trust your ears.
IntroStep 1 of 50

C♯m7

LeftC♯2, G♯2RightB3, E4, G♯4
C4B3E4C♯2G♯2G♯4
Left hand Right hand Middle C (C4)

No source cited for this step

Harmonic Analysis & Structure

Overview

Key: B major · Chords used: 25 · Sections: 8

Form: Intro → A Section → A Section → A Section → A Section → B Section → C Section → D 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

Intro

  • C♯m7 – D♯m7 – E – E/F♯ – F♯7♭9
    ii7 – iii7 – IV – IV (bass F♯) – V7b9

A Section 1

  • B – G♯m7 – E – C♯m7 – B – G♯m7 – A – E/G♯ – D♭/F – A – E/G♯ – F♯sus4
    I – vi7 – IV – ii7 – I – vi7 – bVII – IV⁶ – II⁶ – bVII – IV⁶ – Vsus4

A Section 2

  • B – G♯m7 – E – C♯m7 (×2)
    I – vi7 – IV – ii7
  • F♯sus4 – B
    Vsus4 – I

A Section 3

Same chords as A Section 1.

A Section 4

  • B – G♯m7 – E – C♯m7 (×2)
    I – vi7 – IV – ii7
  • F♯sus4
    Vsus4

B Section

  • B/D♯ – E – B/D♯ – G♯sus4 – G♯7♭9 – E/G♯ – F♯/A♯ – G♯m – C♯m – F♯ – G
    I⁶ – IV – I⁶ – VIsus4 – VI7b9 – IV⁶ – V⁶ – vi – ii – V – bVI

C Section

  • C – Am7 – F – Dm7 (×2)
    bII – bvii7 – bV – biii7
  • G – C
    bVI – bII

D Section

  • F – Em7 – Dm7 – G7 – A
    bV – iv7 – biii7 – bVI7 – bVII

Chord vocabulary

ChordRoman numeralRoleHeard in
C♯m7ii7In the keyIntro, A Section
D♯m7iii7In the keyIntro
EIVIn the keyIntro, A Section, B Section
E/F♯IV (bass F♯)In the keyIntro
F♯7♭9V7b9Borrowed from B minorIntro
BIHome chord (tonic)A Section
G♯m7vi7In the keyA Section
AbVIIBorrowed from B minorA Section, D Section
E/G♯IV⁶In the keyA Section, B Section
D♭/FII⁶Outside the key (chromatic)A Section
F♯sus4Vsus4In the keyA Section
B/D♯I⁶Home chord (tonic)B Section
G♯sus4VIsus4In the keyB Section
G♯7♭9VI7b9Outside the key (chromatic)B Section
F♯/A♯V⁶In the keyB Section
G♯mviIn the keyB Section
C♯miiIn the keyB Section
F♯VIn the keyB Section
GbVIBorrowed from B minorB Section, C Section
CbIIOutside the key (chromatic)C Section
Am7bvii7Outside the key (chromatic)C Section
FbVOutside the key (chromatic)C Section, D Section
Dm7biii7Outside the key (chromatic)C Section, D Section
Em7iv7Borrowed from B minorD Section
G7bVI7Outside the key (chromatic)D Section

Harmonic highlights

  • F♯7♭9 (V7b9) is borrowed from the parallel key, B minor.
  • A (bVII) is borrowed from the parallel key, B minor.
  • G (bVI) is borrowed from the parallel key, B minor.
  • Em7 (iv7) is borrowed from the parallel key, B minor.

Sources & accuracy

  • Chords: the iReal Pro forum charts archived in ChoCo (de Berardinis et al., 2023). Community chord chart “Back At One” (credited “McKnight Brian”, style Pop-RnB) from the forum file linked here, CC BY 4.0 via ChoCo. Performer confirmed from the Billboard year-end charts.
  • 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).
  • 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.
  • About the song: Wikipedia.
  • Not verified: only one chart of this song is available, so it hasn't been cross-checked.
  • 1 chord was simplified to the closest symbol our player supports (for example, an unusual added tone dropped).
  • Rhythm and chord durations aren't shown; each step is one chord change.

Sources & Accuracy

Every chord on this page comes from the community chart listed first below. Piano voicings are our arrangement of the reported chord symbols, not a note-for-note transcription.

  • Chords from a chart a musician wrote and shared on the iReal Pro forums (archived in the ChoCo research dataset); may be in a different key from the recording, and not checked against it.

    Community chord chart “Back At One” (credited “McKnight Brian”, style Pop-RnB) from the forum file linked here, CC BY 4.0 via ChoCo. Performer confirmed from the Billboard year-end charts.

All Piano Voicings

#SectionChordLeft handRight handSources
1IntroC♯m7C♯2, G♯2B3, E4, G♯4—
2IntroD♯m7D♯2, A♯2A♯3, C♯4, F♯4—
3IntroEE2, B2B3, E4, G♯4—
4IntroE/F♯F♯2B3, E4, G♯4—
5IntroF♯7♭9F♯2, C♯3A♯3, C♯4, E4, G4—
6A Section 1BB1, F♯2B3, D♯4, F♯4—
7A Section 1G♯m7G♯2, D♯3B3, D♯4, F♯4—
8A Section 1EE2, B2B3, E4, G♯4—
9A Section 1C♯m7C♯2, G♯2B3, E4, G♯4—
10A Section 1BB1, F♯2B3, D♯4, F♯4—
11A Section 1G♯m7G♯2, D♯3B3, D♯4, F♯4—
12A Section 1AA2, E3C♯4, E4, A4—
13A Section 1E/G♯G♯2B3, E4, G♯4—
14A Section 1D♭/FF2D♭4, F4, A♭4—
15A Section 1AA2, E3C♯4, E4, A4—
16A Section 1E/G♯G♯2B3, E4, G♯4—
17A Section 1F♯sus4F♯2, C♯3B3, C♯4, F♯4—
18A Section 2, part 1 (×2)BB1, F♯2B3, D♯4, F♯4—
19A Section 2, part 1 (×2)G♯m7G♯2, D♯3B3, D♯4, F♯4—
20A Section 2, part 1 (×2)EE2, B2B3, E4, G♯4—
21A Section 2, part 1 (×2)C♯m7C♯2, G♯2B3, E4, G♯4—
22A Section 2, part 2F♯sus4F♯2, C♯3B3, C♯4, F♯4—
23A Section 2, part 2BB1, F♯2B3, D♯4, F♯4—
24A Section 4, part 1 (×2)BB1, F♯2B3, D♯4, F♯4—
25A Section 4, part 1 (×2)G♯m7G♯2, D♯3B3, D♯4, F♯4—
26A Section 4, part 1 (×2)EE2, B2B3, E4, G♯4—
27A Section 4, part 1 (×2)C♯m7C♯2, G♯2B3, E4, G♯4—
28A Section 4, part 2F♯sus4F♯2, C♯3B3, C♯4, F♯4—
29B SectionB/D♯D♯2B3, D♯4, F♯4—
30B SectionEE2, B2B3, E4, G♯4—
31B SectionB/D♯D♯2B3, D♯4, F♯4—
32B SectionG♯sus4G♯2, D♯3C♯4, D♯4, G♯4—
33B SectionG♯7♭9G♯2, D♯3B♯3, D♯4, F♯4, A4—
34B SectionE/G♯G♯2B3, E4, G♯4—
35B SectionF♯/A♯A♯2A♯3, C♯4, F♯4—
36B SectionG♯mG♯2, D♯3B3, D♯4, G♯4—
37B SectionC♯mC♯2, G♯2C♯4, E4, G♯4—
38B SectionF♯F♯2, C♯3C♯4, F♯4, A♯4—
39B SectionGG2, D3D4, G4, B4—
40C Section, part 1 (×2)CC2, G2E4, G4, C5—
41C Section, part 1 (×2)Am7A2, E3E4, G4, C5—
42C Section, part 1 (×2)FF2, C3F4, A4, C5—
43C Section, part 1 (×2)Dm7D2, A2F4, A4, C5—
44C Section, part 2GG2, D3D4, G4, B4—
45C Section, part 2CC2, G2E4, G4, C5—
46D SectionFF2, C3F4, A4, C5—
47D SectionEm7E2, B2D4, G4, B4—
48D SectionDm7D2, A2C4, F4, A4—
49D SectionG7G2, D3D4, F4, B4—
50D SectionAA2, E3C♯4, E4, A4—