Blues Scale vs Pentatonic — Guitar Examples

A minor pentatonic has five notes: 1, b3, 4, 5, b7. It gives you the core blues/rock vocabulary and tends to sound cleaner and more stable.

The A blues scale is the same scale with one extra note, the b5: 1, b3, 4, b5, 5, b7. That extra note adds tension and is usually most effective as a passing or resolving tone.

The A major pentatonic uses 1, 2, 3, 5, 6 and sounds brighter. Adding the b3 gives a major-blues color by creating expressive tension against the major 3rd.