Okay, my music theory skills are rusty to say the least. But the more I play with GPO, the more I want to really diversify my sound. Everything I write, right now, stays within a given key or its relative major/minor key.
In listening to one of my favorite game soundtracks (Metal Gear Solid 2), the title theme has some really effective key changes/modulations, and I'm trying to figure out if there is a "formula" that will help tell me what keys I can "modulate" to from where I am.
In this track, the opening theme starts in A minor. The last note of the melodic phrase ends on an A with a D in the bass. From there, the main theme modulates/changes keys to B minor, with the melody starting on a G flat. Is there some way to know that this key change will work? Do certain modulations work better than others?
Any pointers are appreciated - and if you've not heard that soundtrack I highly recommend it - or at least that opening theme.