In this lesson you will learn to recognize 14 important jazz chord progressions as minor and major II-V-I, turnarounds and their variations, how to use diminished passing chords...etc. You will also find charts with roman numerals to easily transpose these harmonic progressions in different keys and some examples of comping with audio files, tabs and standard notation.
One of the most popular jazz chord substitution is the tritone substitution sometimes referred to as dominant chord substitution.
It consists in replacing a dom7 chord by another dominant 7th chord whose root is a tritone away from this initial chord. Example with G7 (V), which can be replaced by Db7 which is a tritone (three whole-steps) away from G7
Thus giving two chords that have two notes in common. The 7th of G7 (F) is the third of Db7 and the third of G7 (B) is the seventh of Db7. The inversion of the 3rds and the 7ths between the original dominant chord (V) and the substituted dominant chord (bII7) is the main feature of the tritone substitution.