walking bass lines
This concept highly prized by solo guitar players consists in mixing chords and bass lines. It can be very useful for guitarists who want to accompany a singer or a soloist in a duo situation for example.
Guitar walking bass lines involve playing one note on each beat in order to make the link between the chords of a progression as a bass player would do.
They are usually played fingerstyle, basses are played with the thumb whereas the other chord tones are played with the fingers.
This free lesson with tabs and guitar shapes provides some easy examples.