Harmonizing Melodies Complete Theory

This lesson is for those people who want to be able to understand the idea behind melody and harmony.

Ultimate Guitar
This is my 3rd Lesson on ultimateguitar and to be really honest I'm not that good on this topic, I've only been playing for a year and this lesson might not work for you but I'm gonna try my best to make a good one. Lets cut to the chase, if you've ever heard of bands like Iron Maiden, Metallica and Children of Bodom, you'll notice that when they play live one guitarist is playing a melody somewhere down the fretboard while the other one plays it somewhere completely different but they still manage to make a balanced and you would think that they're playing the same notes. In this lesson I will cover the theory behind melodies and harmonizing them and hopefully you will come up with some ideas on how to create harmonies for some previous riffs you might have made. P.S. - You should know a little bit of theory to be able to understand this lesson, if not then I strongly suggest you go learn some otherwise this lesson will not make any sense to you. Anyway on to the topic, now.. a melody is just a sequence of notes sometimes reffered to as a 'voice' and the harmony is the second voice being played on top of your first voice. Now there are two ways of approaching this. Your second voice can be a higher voice (higher pitched) or lower voiced (lower pitched) depending on how you want to harmonize it. People usually harmonize with thirds or fifths which are essentially power chord. Lets take a bunch of notes, in this case we'll use the key of E minor for example, and you're playing the notes E F# and G, if you want to harmonize these using thirds you will play G A B on top of the first melody. G is a minor third away for E, A is a minor third as well and B is a major third. The reason why we're playing these notes is because we want to play the notes that are in the key of E minor. It is up to you to decide if you should play a minor or major third but you want to stay in key. Let me show you a quick example in TAB form, here is your first melody:
The notes are E F# G respectively, now if you're harmonizing with thirds, you will play this:
So this is when you're playing a double guitar harmony. You can add another guitar to make a triple guitar harmony... now this may sound really awesome and everything but you will encounter some problems. One is that there aren't many bands that do that so you will be seen as an outcast lol kidding.. um.. a problem that you will come across is of sound clarity. The notes might sound muddy and messed up because there are too many guitars mixing in different harmonies. And for this example that I just showed you the third guitarist will most probably play in fifths and the fifth of F# is C#, but C# is not in the key of E minor. But there are ways of getting around this, either you could harmonize with something else like octaves, but that might sound a bit messy, or you could change the C# back to the natural C note but C isn't F#'s fifth. So you have a bit of a problem there. It might sound a little strange when you harmonize it that way. Anyway, once you get the hang of harmonizing then by experience you will come across ways to solve this problem, besides you probably aren't even going to use 3 guitars heh. Musicians also harmonize when playing power chords or triads of any kind, for example if you're playing an E minor power chord then you can play a G minor over that if you're harmonizing using thirds Example:
I'll leave you with one last example, this is from the song 'Phantom of the Opera' by Iron Maiden. This riff comes somewhere in the middle before the solo:
Guitar 1 Adrian Smith (Lower Voice)


Guitar 2 Dave Murray (Higher Voice)


Hopefully you have gained something from this lesson, I do apologize if I haven't explained it properly but I've tried my best to. Cheers guys, keep rockin'!

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    David Blackbird
    In a Minor scale, you're supposed to use the Diminished Fifth, which, in E Minor, the Diminished Fifth of F# is C natural. It might sound weird on its own, but it will sound ok in the progression. Other than that, this was a very well-written lesson, and I think most people should be able to understand it.
    In my idea, the harmonizing is basically just a slight octave, makes it sound brighter or darker in sound
    guitarprodigy14 wrote: In my idea, the harmonizing is basically just a slight octave, makes it sound brighter or darker in sound
    Indeed. I'm so sorry I forgot to mention that you don't have to harmonize with just thirds and fifths.. you can also just use octaves.
    this is really a great lesson, bullet for my valentine harmonizes mostly outta 1st and 3rd notes and so does metallica and trivium and such.
    metalrox20 wrote: this is really a great lesson, bullet for my valentine harmonizes mostly outta 1st and 3rd notes and so does metallica and trivium and such.
    Using the 1st tonic is writing in unison more than harmoney. Correct me if i'm wrong
    I love doing this...my brother and i do it to liven up our music...it really sounds cool...and it makes non-guitar players jaws drop...lol
    Another thing to generally remember with harmonizing on thirds is that if a melody is (Let +1= Up a single fret, +2 up to frets) that if one melody goes +1 +1 +2, the third harmony will go +2 +2 +1