Tritone substitution is a method of replacing a Dom7 chord with another Dom7 chord that shares the same tritone, and it sounds terrific.

In the widespread boredom epidemic of the 16th century, the Harmonic Minor scale was invented to battle the blandness of major and minor scales. While that sentence may be a complete and utter falsification of music history, it does have some truth to it. Harmonic Minor has a dark and mysterious sound that is, as of yet, not so common in popular music, making it useful for bringing in some freshness to your compositions. So today we're going to see what exactly it is, where