The final step in learning to play over a constant bass is to be able to play licks freely with the fingers , while maintaining a steady, driving bass. Start with simple licks and gradually increase the complexity as you become more comfortable.
The aim is to eventually be able to play licks, chords or whatever you choose in any rhythm over the constant bass, without losing your timing or missing any notes. Here is a Blues in E which uses a shuffle bass and features both licks and chords over the top of it. Be patient with it, practice with a metronome and isolate any difficult areas to practice separately.
By now you should be playing confidently and enjoying your music. To finish with, here is a Blues in A which is played with straight 8th notes. Once again, take your time with it and isolate any trouble spots to practice separately. Have fun.
For more books and recordings by Peter Gelling visit www.bentnotes.com