Port Street Blues Tutorial: Chords & Harmony
In this lesson Jon breaks down the chord sequence for the tune "Port Street Blues" and discusses the reharmonisations and modulations. Port Street Blues contains an interesting chord progression that departs from the standard 1-4-5 changes.
Chord Substitutions In The Blues
When playing the blues we can use chord substitutions to tick the listeners ear to the point where the listener cannot remember the tonic or home base of the chord progression.
When playing the standard 1-4-5 blues it’s always very obvious where the ‘home base’ sits in the chord progression. However, with Port Street Blues the tune takes the listener on a journey through some interesting chord substitutions.
Port Street Blues Chord Changes & Form
Port Street Blues follows a 16 bar form. The first 8 bars follow a repeated motif based around C7 which is the tonic of the tune. This opening sequence establishes the tonality and sets the stage for the upcoming substitutions.
In bar 8 the harmony begins to shift with a modulation to F7 in bar 9 which is then followed by a 251 progression to Eb Major. At this point in the progression we have tricked the listener into thinking that the Eb is the new tonic.
The progression then uses interesting passing chords to move to Ab7, F#dim7, and G-7 which is then used to start a 251 progression which takes us back to the original home base of C.
Port Street Blues Chord Voicings File Type: pdf