A Minor Pentatonic, Mapped for the Guitar
Where A Minor Pentatonic lies on this seat's fretboard, and how a blues phrase leans on it.
A Minor Pentatonic runs 5 notes to the octave, laid across this seat's EADGBE fretboard with every A marked. A blues phrase is short and keeps coming home to one pitch; the marked notes are where it comes home to.
Gritty, bluesy, and direct — five notes with no half steps, so each one lands with attitude over a minor or dominant chord. The sound of rock and blues lead playing.
Heard in: Blues, rock, hard rock, metal, funk, and soul solos — the first scale most lead players learn and the one they never leave.
On the guitar a scale is mostly raw material for bends: a note a fret or two below the one you want, pushed up until it sounds right against the chord, which is how a fretted instrument reaches the pitches between its frets.
Whatever scale you start from, the blues bends it: the third and the seventh get pushed flat, or somewhere between flat and natural, and that pull against the chord underneath is most of what the idiom sounds like.