Compose a Jazz song,
Use the blues scale. The minor pentatonic with a diminished V
Come up with a hook or a motif. Play around the scale to come up with this. You will use this phrase as a recurring theme that brings the song together.
Start with a simple chord structure ii - V - I
Develop this progression further to make it more Jazzy. Add 7th or 9th notes to the chords and add extra chords to the progression.
Add a walking bass line. This is where the bass playing up and down the scale in the phrase.
Build a groove structure. A cyclic structure that will go round and round repeating itself. The 12 bar blues is a popular Jazz structure, but you might want to be more adventurous.
Leave room for improvisation. This is the essence of Jazz.
How do you do improv? ........ That is a different skill set completely. This video helps to shed some light of what goes on the brain when improvisation takes place.
Deadline 16th November