In Blues fingerpicking, bass notes are often repeated on each beat. This is called a constant bass line. The easiest key to apply this style to is the key of A, because the root bass note of each of the three primary chords in the key of A (A, D and E) can be played as an open string.
Now try applying the constant bass notes above to a 12 bar Blues progression.
The constant bass line is used in conjunction with notes from the following A scales.
The next example combines the constant bass line whilst ascending and descending the Blues scale shown above. The recommended fingering should only be used as a guide.