Bvii

Why do many songs in major keys use a bVII chord?
The use of chords from the parallel natural minor in a major key adds some dark or bluesy color to the typical major sound. Note that other modes, suc...
Why is the bVII chord said to be borrowed from the parallel minor?
First, the bVII (Eb in your example) is a dominant seventh chord in most cases. It is not seldomly preceeded by a iv7 (Bbm7) chord to make it a ii-V p...
Bvii chord
Simply that the bVII7 chord is nothing more than a Dominant chord (7) that is built on the bVII degree of the key (Flat Seven aka the Subtonic). In a ...
Bvii chord minor
In a Major key, bVII is just a half-step below vii. If we are in the key of C, the bVII7 chord is Bb7. It is borrowed from the parallel key of C minor...