Swing Shuffle in G
A good bass line can really make a groove swing. This bass line here is the most common type and very reliable for good swinging groove. All you really need, especially when it's a more up-tempo swing, is to play on the quarter note or downbeats, one-two-three-four, one-two-three-four etc. You kind of walk along the chord tones, Root-Third-Fifth-Sixth going up, then come down from the octave Root-Sixth-Fifth-Third, and you do this for the I & IV chords. At the turn around or ninth measure it is a great swingin' move to walk from the 2nd degree to the fifth degree (2,3,4,#4,5). Listen and you will hear it. It sounds like old school blues and it's very common and drives the groove right back to the top.