September Song – Intro
September Song – Verse
September Song – Bridge
Related Music Concepts
Inverted Chords
Using a different bass note to change a chord's sound
Seventh Chords
Adding one more note to the basic chords
Borrowed Chords
Using chords from parallel modes for contrast and emotion
Diminished Chords
A chord built from stacked minor thirds — dark and unstable
Fully Diminished 7ths
A four-note diminished chord that strongly pulls toward resolution
Secondary Chords
Chords that temporarily shift the harmonic center
Chord Progression Novelty
How unusual the chord sequence is compared to other songs
Song Stats
●
Key
A♭ Major
Tempo
65 BPM
Meter
4/4
Genre
Country, Folk/Americana, Jazz
Melody Range
Bb2 – Bb4
Mood
Complex, Unexpected, Mellow, Bright
Most Used Chord
I
Chord Complexity
91
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
88
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
41
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
74
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
A♭ Major
Tempo
69 BPM
Meter
4/4
Genre
Country, Folk/Americana, Jazz
Melody Range
Ab3 – Bb4
Mood
Smooth, Complex, Unexpected, Mellow, Bright
Most Used Chord
I
Chord Complexity
91
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
82
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
21
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
76
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
A♭ Major
Tempo
68 BPM
Meter
4/4
Genre
Country, Folk/Americana, Jazz
Melody Range
G4 – B4
Mood
Complex, Unexpected, Mellow, Bright
Most Used Chord
iv
Chord Complexity
94
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
71
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
98
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
A♭ Major
Tempo
65 BPM
Meter
4/4
Genre
Country, Folk/Americana, Jazz
Melody Range
Bb2 – B4
Mood
Complex, Unexpected, Mellow, Bright
Most Used Chord
I
Chord Complexity
93
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
84
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
37
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
87
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 September Song
About the Key
A♭ Major
It is the least popular key among Major keys and the 21st 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 (A♭ Major, D♭ Major, and E♭ Major).
A♭ Major Cheat Sheet
Popular chords, progressions, downloadable MIDI files and more
About the Chord Progressions
| Section | Progression | Songs with this progression |
|---|---|---|
| Intro |
IV7(dor)
VI7
I
vi65
I
II65(lyd)
♭IV6
|
No other theorytabs with this progression |
| Verse |
vi65
IV7(dor)
VI7
I
vi65
I
II43(lyd)
|
No other theorytabs with this progression |
| Bridge |
♭V65/IV
♭IV64
vii°7/V
♭IV64
vii°7/V
|
No other theorytabs with this progression |
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.
Bb2 – B4
Melody range across 25 semitones
1.14 beats/note
Across 116.0 beats of melody
Stepwise Motion
Jumpiness
Repeaty
93%
Diatonic
Percentage of notes within the song's key.
74%
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
93
Measures how diverse and sophisticated the chord vocabulary is in this song.
Percentile: 93/100 — above average
Melodic Complexity
84
Measures the range, intervallic variety, and rhythmic complexity of the melody.
Percentile: 84/100 — above average
Chord-Melody Tension
37
Measures how much the melody notes clash or harmonize with the underlying chords.
Percentile: 37/100 — below average
Chord Prog. Novelty
87
Measures how unusual or unexpected the chord progressions are compared to common patterns.
Percentile: 87/100 — above average
Chord-Bass Melody
46
Measures the melodic movement of the bass notes across chord changes.
Percentile: 46/100 — below average
Song Data
Metrics Radar Chart
September SongAverage 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.
