In this video we sing Melody Paths over a long chord progression which includes the beautiful b7 chord. All of the chords in this chord progression come directly from the key of the music except for the b7 chord and the 3D chord, which both introduce notes from outside the key.
This progression illustrates something very common in jazz and bossa nova music which is the surprising change from the b7 chord to the 7-b5 chord which brings us back into the key of the music. (Examples are the Miles Davis composition "Solar" and Jobim's bossa nova "Insensatez"). In long chord progressions like this, practicing the exercise Melody Paths can be especially helpful for internalizing the flow of the progression.
Would you like to practice improvising over this chord progression? You'll find it in lesson 15 of our IFR Jam Tracks Level 4: Mixed Harmony Essentials.