Is the ii V I scale based on the upcoming I scale ? Wouldn't that cause key change?

1. WHAT IS II VI chord progression?
2. What can you play over a minor Ii Vi?
3. What is a backdoor Ii Vi?

WHAT IS II VI chord progression?

A ii-V-I is the most commonly use chord progression in Jazz; you'll find it in almost every (Tonal) Jazz Standard. It provides a strong sense of finality and establishes the the tonic chord. This is because we are moving through a functional Pre-Dominant → Dominant → Tonic chord progression.

What can you play over a minor Ii Vi?

Over a minor ii-V-i, the melodic minor sound is used thus:

• Over the iim7(b5) chord, use a melodic minor scale up a minor third from the root. Ex. Em7(b5)=G melodic minor.
• Over the V7 chord, use a melodic minor scale up a half-step from the root. Ex. ...
• Over the imin69, use the melodic minor scale based on the root. Ex.

What is a backdoor Ii Vi?

In jazz and jazz harmony, the chord progression from iv⁷ to ♭VII⁷ to I (the tonic or "home" key) has been nicknamed the backdoor progression or the backdoor ii-V, as described by jazz theorist and author Jerry Coker.