Operation Evolution – Intro
Operation Evolution – Verse
Operation Evolution – Pre-Chorus
Operation Evolution – Chorus
Operation Evolution – Bridge
Operation Evolution – Solo
Operation Evolution – Solo 1
Operation Evolution – Solo 2
Operation Evolution – Solo 3
Operation Evolution – Solo 3
Operation Evolution – Instrumental
Operation Evolution – Pre-Outro
Operation Evolution – Outro
Operation Evolution – Outro 1
Operation Evolution – Outro 2
Related Music Concepts
Basic Chords
Chords naturally found in the key
Chord-Melody Tension
How much the melody clashes with the underlying chords
Inverted Chords
Using a different bass note to change a chord's sound
Seventh Chords
Adding one more note to the basic chords
Diminished Chords
A chord built from stacked minor thirds — dark and unstable
Borrowed Chords
Using chords from parallel modes for contrast and emotion
Song Stats
●
Key
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
F4 – F6
Mood
Tense, Classic, Upbeat, Moody
Most Used Chord
i(no3no5)
Chord Complexity
31
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
61
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
94
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
11
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
F3 – A6
Mood
Simple, Upbeat, Moody
Most Used Chord
i
Chord Complexity
23
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
78
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
57
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
29
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
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
Bb2 – C5
Mood
Tense, Upbeat, Bright
Most Used Chord
I(no5)
Chord Complexity
31
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
72
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
70
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
28
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
A#3 – D#6
Mood
Tense, Simple, Upbeat, Moody
Most Used Chord
III
Chord Complexity
8
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
32
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
65
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
23
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
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
F4 – Bb5
Mood
Tense, Simple, Classic, Upbeat, Bright
Most Used Chord
I
Chord Complexity
9
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
61
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
70
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
18
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
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
F4 – Bb5
Mood
Upbeat, Bright
Most Used Chord
I
Chord Complexity
27
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
62
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
32
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
26
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
F4 – A5
Mood
Tense, Simple, Upbeat, Moody
Most Used Chord
i
Chord Complexity
13
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
62
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
68
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
22
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
G3 – G5
Mood
Simple, Classic, Upbeat, Moody
Most Used Chord
i
Chord Complexity
12
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
35
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
58
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
0
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
G3 – G6
Mood
Smooth, Simple, Classic, Upbeat, Moody
Most Used Chord
i
Chord Complexity
10
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
61
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
23
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
17
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
A#4 – F6
Mood
Tense, Simple, Classic, Upbeat, Moody
Most Used Chord
i
Chord Complexity
18
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
58
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
8
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
A#3 – D5
Mood
Tense, Simple, Classic, Upbeat, Moody
Most Used Chord
i
Chord Complexity
18
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
22
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
79
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
4
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
G Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
G3 – F6
Mood
Tense, Simple, Classic, Upbeat, Moody
Most Used Chord
i
Chord Complexity
19
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
86
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
7
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 Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
C3 – D6
Mood
Tense, Upbeat, Moody
Most Used Chord
i
Chord Complexity
30
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
59
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
67
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
30
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♭ Minor
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
Bb2 – F7
Mood
Simple, Classic, Upbeat, Moody
Most Used Chord
i
Chord Complexity
15
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
64
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
40
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
4
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
●
Tempo
165 BPM
Meter
4/4
Genre
Video Game
Melody Range
Bb2 – F7
Mood
Tense, Simple, Upbeat, Moody
Most Used Chord
i
Chord Complexity
20
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
60
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
73
Chord-Melody Tension: Quantifies how often melody notes fall outside the current chord, producing dissonance that creates a sense of instability.
Chord Prog. Novelty
20
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 Operation Evolution
About the Key
G Minor
It is the 6th most popular key among Minor keys and the 14th most popular among all keys. Minor keys, along with major keys, are a common choice for popular music.
i iv VI
Most Important Chords
The three most important chords, built off the 1st, 4th and 5th scale degrees are all minor chords (G minor, C minor, and D minor).
G Minor Cheat Sheet
Popular chords, progressions, downloadable MIDI files and more
About the Chord Progressions
| Section | Progression | Songs with this progression |
|---|---|---|
| Intro |
|
|
| Verse |
|
|
| Pre-Chorus |
|
|
| Chorus |
|
|
| Bridge |
|
|
| Solo |
|
|
| Solo 1 |
|
|
| Solo 3 |
|
No other theorytabs with this progression |
| Solo 3 |
|
|
| Instrumental |
|
|
| Pre-Outro |
|
|
| Outro |
|
|
| Outro 1 |
|
|
| Outro 2 |
|
|
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 – F7
Melody range across 55 semitones
0.44 beats/note
Across 742.0 beats of melody
Stepwise Motion
Jumpiness
Repeaty
100%
Diatonic
Percentage of notes within the song's key.
62%
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
20
Measures how diverse and sophisticated the chord vocabulary is in this song.
Percentile: 20/100 — below average
Melodic Complexity
60
Measures the range, intervallic variety, and rhythmic complexity of the melody.
Percentile: 60/100 — above average
Chord-Melody Tension
73
Measures how much the melody notes clash or harmonize with the underlying chords.
Percentile: 73/100 — above average
Chord Prog. Novelty
20
Measures how unusual or unexpected the chord progressions are compared to common patterns.
Percentile: 20/100 — below average
Chord-Bass Melody
50
Measures the melodic movement of the bass notes across chord changes.
Percentile: 50/100 — average
Song Data
Metrics Radar Chart
Operation EvolutionAverage 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.
