A popular fingerpicking technique that features in Blues guitar is the constant bass line style. This technique involves the right hand thumb playing the root bass note of the chord repeatedly for the duration of the song. The easiest key to apply this style is the key of A because the root bass note of each chord in the key of A (A, D and E) can be played as an open string.
Now try applying the constant bass lines from the previous example to a 12 Bar Blues progression in the key of A.
The constant bass line is used in conjunction with notes from the following A scales.
The next example combines a constant bass line while ascending and descending the scale shown in the previous diagram. The recommended fingering should only be used as a guide.