The chord progression is without a doubt the underlying driving force of your song. The way I like to think about it, is that specific chords can convey very specific types of emotions, and more specifically, it's the transition between two chords what conveys a sense of emotive movement in your composition. I am well aware that this type of blog post is probably a horse beaten far beyond the point of no return, but I'll try to offer some tips that I use when I feel like I'm stuck while writing music. Let's get started!
Remember the basics
One thing that I've learned the hard way, is that adding complexity to your music, for the sake of adding complexity is usually not a good way to develop your composition. You don't really need incredibly complex harmony to create an interesting piece of music. You really don't need more than the simple old major scale to create good chord progressions, as a matter of fact if you're building your chords from a diatonic scale, it'll be unlikely that you end up with something that doesn't sound nice.
Here are some examples of chord progressions that I personally use a lot:
Melody on top of your chords
Sprinkling some notes on top of your chords can add a lot of character. Notes beyond the 3rd and 5th of a chord can add a lot flavor to your progression and make it feel like you've already composed a little composition that only needs a little more fleshing out. Here are 3 variations of melodies on top of the 3-4-5-6 chord progression we have already seen earlier:
Next up are borrowed chords. Inserting a chord from another mode in your progression can change the entire overall mood, and has the effect of giving a surprising audible twist. Here are some examples, with the same chord progressions from the first tip, but where we replace one of them by it's major or minor equivalent.
Trust your ears
Using my ears is maybe one of the things that I forget most often. And by using my ears I mean actively listening to the music I'm working on, and trying to imagine where it wants to go. Every chord has a tendency to go somewhere, it's somehow pulling towards a different set of notes, sometimes it's not very obvious where it wants to go though. For example a simple major chord is very comfortable and doesn't seem like it's about to go anywhere, but if you try to picture where it could go you can start hearing some options.
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