Five notes.
All of them work. All of the time.
BB King was one of the greatest guitarists who ever lived. Watch him play and he barely moves his hand. Three notes, repeated with feeling. A note held so long it aches. A bend that says more than a scale run ever could.
Of the ten notes in the box, three are your foundation: A (root), C (the minor third), and E (the fifth). These are the notes the chord is built from. They’re the most stable landing spots, the ones your ear trusts most.
The other two — D and G — are still useful. They add colour and tension. But if you’re getting lost, come back to A, C and E.
Great improvisation isn’t about using every note. It’s about saying something with the ones you choose. Repetition, rhythm, space. Pick two notes and make them mean something.