Watch the Lovely Bass online guitar lesson by Andrew Ford from 50 R&B Bass Grooves You MUST Know

This Bill Withers inspired line is a 4 bar pattern with the same motif for the whole riff with slight variations in notes and rhythms. Notice the different ways in which it leads to each new chord change, sometimes going chromatically up or down or maybe a pivot note such as the C# in bar 2. One of the subtle things about this line is the slight swing on the 16th note before beat 3 in each bar even though the groove is straight.