Watch the Quarter to Four online guitar lesson by Andrew Ford from 30 Rock Bass Grooves for Beginners You MUST Know
This driving groove is based on the song "25 or 6 to 4" by the band Chicago. It's a 4-bar phrase that repeats the same motif for the first 3 bars but with different notes. The focus here is driving those root notes and that repetitive but catchy rhythm.
In Bar 4, we deviate from the rhythm with some straight eighth notes to end the phrase and set up the new phrase. In the first bar, we use A on the D string to play those roots, I like playing higher on the fretboard, it tends to be a little warmer. Next, we move down to the G in the bass playing that same motif, then with Gb, and lastly, we change up the pattern using all 8ths to finish out the phrase, four 8th notes on the root F, and then 4 other notes on the G.