Watch the C7 - Eb7 Vamp online guitar lesson by Brad Carlton from CAGED Dominant

Using arpeggios over the C7 to Eb7 chord change in this example, Brad explores the use of connector notes – the Bb and G. These can be used to sustain over a change to incorporate legato phrases. He also points out how the Eb is the b3rd of the C7 in addition to being the root of the Eb7.