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Pentatonic and Blues Scales
Builds on Minor Scales: Natural, Harmonic, Melodic
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The major pentatonic scale strips the major scale down to just five notes, removing the 4th and 7th degrees — the two notes most likely to clash or demand resolution. What's left is a scale where almost any combination of notes sounds consonant, which is why it's so common in folk melodies, guitar solos, and beginner improvisation.
The blues scale takes the minor pentatonic (the relative-minor five-note scale) and adds one extra chromatic note — a lowered 5th degree sometimes called the 'blue note' — sitting right between the 4th and 5th. That single added note is responsible for blues music's signature bent, vocal-like quality.
⚠️ Common mistake
Confusing major pentatonic with its relative minor pentatonic. They contain the exact same five pitches (e.g. C major pentatonic = A minor pentatonic) — only the tonic differs, exactly like major/minor keys sharing a key signature.
📝 Summary
Major pentatonic removes the major scale's 4th and 7th degrees. The blues scale adds one chromatic 'blue note' (a lowered 5th) to the minor pentatonic for blues' signature bent sound.
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