Modulating To The Parallel Key
The next method of modulation changes to the
Parallel Major/Minor key. If you are playing in a major key, the parallel minor is the minor key that has the same root note as the major key. For example A Minor is the parallel minor to A Major. The reverse processes is modulating to the parallel major key if you are playing in a minor key. You can either use substitution to borrow chords from the parallel minor key (as mentioned
here) or completely change keys to the parallel minor key.
Here is an example of a composition I did for my music theory class that changes to the parallel minor key. This song is originally in G major, then at 15 seconds it changes to G minor, and changes back to G major at 20 seconds. At about 24 seconds it goes to G minor again and back to G major at 25 seconds.
Orchestra Composition