Irreplaceable – Verse
Irreplaceable – Pre-Chorus
Irreplaceable – Chorus
Irreplaceable – Bridge
Related Music Concepts
Add Chords
A chord with an added tone that enriches its sound
Extended Chords
Stacking thirds beyond the 7th to create more complex sounds
Seventh Chords
Adding one more note to the basic chords
Chord Progression Novelty
How unusual the chord sequence is compared to other songs
Borrowed Chords
Using chords from parallel modes for contrast and emotion
Inverted Chords
Using a different bass note to change a chord's sound
Secondary Chords
Chords that temporarily shift the harmonic center
Song Stats
●
Key
B♭ Major
Tempo
88 BPM
Meter
4/4
Genre
R & B
Melody Range
Bb3 – Bb4
Mood
Unexpected, Bright
Most Used Chord
V
Chord Complexity
37
Chord Complexity: Tracks when a song goes beyond simple three-note chords—either by adding extra tones (like 7ths or add9s) or by borrowing notes from outside the key—creating richer, more sophisticated harmonies.
Melodic Complexity
47
Melodic Complexity: Reflects two factors: the use of notes outside the key and rhythmic syncopation, together capturing how intricate or surprising a melody feels.
Chord-Melody Tension
45
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
75
Chord Prog. Novelty: Measures how uncommon a song's chord changes are compared to others in the Hooktheory database, highlighting progressions that deviate from typical patterns.
Concepts
Song Stats
●
Key
B♭ Major
Tempo
88 BPM
Meter
4/4
Genre
R & B
Melody Range
D4 – G4
Mood
Smooth, Complex, Unexpected, Bright
Most Used Chord
IV
Chord Complexity
85
Chord Complexity: Tracks when a song goes beyond simple three-note chords—either by adding extra tones (like 7ths or add9s) or by borrowing notes from outside the key—creating richer, more sophisticated harmonies.
Melodic Complexity
10
Melodic Complexity: Reflects two factors: the use of notes outside the key and rhythmic syncopation, together capturing how intricate or surprising a melody feels.
Chord-Melody Tension
17
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
97
Chord Prog. Novelty: Measures how uncommon a song's chord changes are compared to others in the Hooktheory database, highlighting progressions that deviate from typical patterns.
Song Stats
●
Key
B♭ Major
Tempo
88 BPM
Meter
4/4
Genre
R & B
Melody Range
D4 – Eb5
Mood
Tense, Unexpected, Bright
Most Used Chord
I
Chord Complexity
67
Chord Complexity: Tracks when a song goes beyond simple three-note chords—either by adding extra tones (like 7ths or add9s) or by borrowing notes from outside the key—creating richer, more sophisticated harmonies.
Melodic Complexity
66
Melodic Complexity: Reflects two factors: the use of notes outside the key and rhythmic syncopation, together capturing how intricate or surprising a melody feels.
Chord-Melody Tension
80
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
85
Chord Prog. Novelty: Measures how uncommon a song's chord changes are compared to others in the Hooktheory database, highlighting progressions that deviate from typical patterns.
Concepts
Song Stats
●
Key
B♭ Major
Tempo
88 BPM
Meter
4/4
Genre
R & B
Melody Range
Bb3 – D5
Mood
Bright
Most Used Chord
V
Chord Complexity
40
Chord Complexity: Tracks when a song goes beyond simple three-note chords—either by adding extra tones (like 7ths or add9s) or by borrowing notes from outside the key—creating richer, more sophisticated harmonies.
Melodic Complexity
79
Melodic Complexity: Reflects two factors: the use of notes outside the key and rhythmic syncopation, together capturing how intricate or surprising a melody feels.
Chord-Melody Tension
56
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
56
Chord Prog. Novelty: Measures how uncommon a song's chord changes are compared to others in the Hooktheory database, highlighting progressions that deviate from typical patterns.
Song Stats
●
Key
B♭ Major
Tempo
88 BPM
Meter
4/4
Genre
R & B
Melody Range
Bb3 – Eb5
Mood
Unexpected, Bright
Most Used Chord
V
Chord Complexity
61
Chord Complexity: Tracks when a song goes beyond simple three-note chords—either by adding extra tones (like 7ths or add9s) or by borrowing notes from outside the key—creating richer, more sophisticated harmonies.
Melodic Complexity
51
Melodic Complexity: Reflects two factors: the use of notes outside the key and rhythmic syncopation, together capturing how intricate or surprising a melody feels.
Chord-Melody Tension
49
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
83
Chord Prog. Novelty: Measures how uncommon a song's chord changes are compared to others in the Hooktheory database, highlighting progressions that deviate from typical patterns.
About Irreplaceable
About the Key
B♭ Major
It is the 8th most popular key among Major keys and the 12th most popular among all keys. Major keys, along with minor keys, are a common choice for popular songs.
I IV V
Most Important Chords
The three most important chords, built off the 1st, 4th and 5th scale degrees are all major chords (B♭ Major, E♭ Major, and F Major).
B♭ Major Cheat Sheet
Popular chords, progressions, downloadable MIDI files and more
About the Chord Progressions
| Section | Progression | Songs with this progression |
|---|---|---|
| Verse |
I
V
iiadd4
IVadd6add9
V
|
|
| Pre-Chorus |
IV9
vi7add4
IV9
iii
iiadd4
V
|
No other theorytabs with this progression |
| Chorus |
I
V
iiadd4
IVadd6add9
I
V
iiadd4
|
|
| Bridge |
IV7
V
I
V6
vi
V
|
|
About the Melody
Melody data is compiled from all analyzed melody sections, so depending on how a user analyzed a song, "melody" might include instrumental notes.
Bb3 – Eb5
Melody range across 17 semitones
0.50 beats/note
Across 120.0 beats of melody
Stepwise Motion
Jumpiness
Repeaty
99%
Diatonic
Percentage of notes within the song's key.
59%
Chord Tones
Percentage of notes that fall on a chord tone of the underlying harmony.
Mixed
Consonance
How smoothly the melody blends with the harmony (0 = dissonant, 1 = consonant).
Loose
Syncopation
How often the melody emphasizes off-beats. Higher = more syncopated.
About the Metrics
Chord Complexity
Chord Complexity tracks when a song goes beyond simple three-note chords—either by adding extra tones (like 7ths or add9s) or by borrowing notes from outside the key—creating richer, more sophisticated harmonies.
Melodic Complexity
Melodic Complexity reflects two factors: the use of notes outside the key and rhythmic syncopation, together capturing how intricate or surprising a melody feels.
Chord-Melody Tension
Chord-Melody Tension quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Progression Novelty
Chord Progression Novelty measures how uncommon a song's chord changes are compared to others in the Hooktheory database, highlighting progressions that deviate from typical patterns.
Chord-Bass Melody
Chord–Bass Melody evaluates how smoothly the bass moves between chords, scoring higher when it travels step-wise, ascending or descending, instead of jumping directly between root position chords.
Hooktheory's metrics are calculated against the entire database of analyzed songs, where 50 is the "average song." Learn more about each of these metrics here.
Chord Complexity
61
Measures how diverse and sophisticated the chord vocabulary is in this song.
Percentile: 61/100 — above average
Melodic Complexity
51
Measures the range, intervallic variety, and rhythmic complexity of the melody.
Percentile: 51/100 — above average
Chord-Melody Tension
49
Measures how much the melody notes clash or harmonize with the underlying chords.
Percentile: 49/100 — below average
Chord Prog. Novelty
83
Measures how unusual or unexpected the chord progressions are compared to common patterns.
Percentile: 83/100 — above average
Chord-Bass Melody
58
Measures the melodic movement of the bass notes across chord changes.
Percentile: 58/100 — above average
Song Data
Metrics Radar Chart
IrreplaceableAverage Song
BPM Comparison
Melody Distribution
1
2
3
4
5
6
7
Melodic Intervals
Distribution of note-to-note jumps in semitones (negative = downward, positive = upward)
Note Durations
How long each note is held (in beats)
Syncopation
How many notes fall on each level of metric strength (0 = on-beat, higher = increasingly off-beat)
Level 0
Notes that fall on the downbeat — the strongest metric position in the measure.
Level 1
Notes on a secondary strong beat (e.g. beat 3 in 4/4) — still firmly on the grid.
Level 2
Notes on the remaining primary beats (2 and 4 in 4/4) — moderate metric weight.
Level 3
Notes on eighth-note offbeats — between the primary beats. Audibly syncopated.
