January 2018 Music Composition Challenge - Summary and Analysis

How I Write my Music – Ep.1 – Fantasy on a (given) Theme

Welcome to Episode 1 of How I Write my Music. In this tutorial I’m taking you behind the scenes to show you my thoughts as I composed my “Fantasy on a (Given) Theme.

This piece was my own entry for the School of Composition January 2018 Composition Challenge. The composition challenge is a monthly event here on this site and it’s open to composers of all ages and styles. At the end of every challenge, I select a few interesting entries and discuss them on a separate video.

Before we begin, listen to this composition. I called it “Fantasy on a (Given) Theme”

Behind the Scenes

The Challenge

The challenge was quite simple: Compose a 2-minute (or more) piece that somewhere, somehow uses this 6-note sequence:  

January 2018 - Music Composition Challenge

As you can probably see, its main characteristic feature is the tritone (aka. the interval of the augmented fourth) between the E flat and A.


Fantasy on a (Given) Theme

The first thing to notice is the initial harmonization of the given sequence. Particularly the E flat (that originally caused a lot of discussion) is harmonized by a simple F sharp diminished 7th chord that leads to the chord of G major, which of course in turn is the dominant of C. This is important because I wanted to stay in this key.

January 2018 - Music Composition Challenge

Section A is composed of little fragments that outline the interval of the tritone. This is on purpose – the tritone refers back to the given sequence. Remember we said that the tritone is its characteristic feature.

January 2018 - Music Composition Challenge

What is interesting is that the result of the moving voices is this chord: G7b5 – in the key of C major, that’s the dominant 7th with the flattened 5th.

January 2018 - Music Composition Challenge


The Accompaniments

Now you might notice that this section is made up of two parts itself. One is with this accompaniment:

January 2018 - Music Composition Challenge

And the other with this:

January 2018 - Music Composition Challenge

What’s interesting is that this second accompaniment figure is a development of an earlier idea – specifically the transition to where the strings repeat what the winds just played.

January 2018 - Music Composition Challenge


The Ending

The ending of this section uses a technique known as fragmentation – the theme is broken down into tiny parts (in this case, just the first two notes) and the whole orchestra plays around with them until we get to the final chord. When you look at the score and listen to the piece, you’ll notice that this section is repeated. I decided that it should be repeated because of its form:

January 2018 - Music Composition Challenge

As the diagram above explains, this section begins with those short melodies (fragments) played by the winds that are then repeated by the strings (bars 6 – 15).

But when the winds play some new fragments again (bar 20 onwards), the strings DON’T get to play them as well. Instead we get to the ending. To some extent the section comes to a finish a little bit early and so there’s a sort of imbalance. The repetition of the whole section makes that imbalance more convincing just because it becomes more familiar with a second listening.

This imbalance, by the way, contributes to the comedic, agitated effect that this whole section has.


Section B

As usual section B is a contrast: it’s slower and consists of a longer, more lyrical theme. What’s important to note here is that just because it’s a contrast, doesn’t mean that it should be completely new. If it was, why not simply make a new piece out of it?

I want the contrasting section to be related at the same time. And so the melody here comes out of the retrograde-inversion of the original sequence. If that sentence confuses you, I’ll explain:

To invert a melody means to put it upside down. If, for example, the melody begins with the interval of an ascending third from G to B, we change it into a descending third from G to E flat. The quality of the interval (whether major, minor, augmented or diminished) can be kept or changed according to the scale in use at the moment.

Here’s the original sequence again:

January 2018 - Music Composition Challenge

Here it is inverted: the ascending major 6th of the original becomes a descending major sixth, the descending major seconds become ascending major seconds and so on..

January 2018 - Music Composition Challenge


Here is the inversion backwards (that is, in retrograde) – this transformation is called retrograde-inversion.

January 2018 - Music Composition Challenge

This transformation of the theme is the basis of Section B. The melody here is the retrograde inversion and then continues with sequences of the first four notes. Sequences are repetitions that begin on a different pitch.

January 2018 - Music Composition Challenge

Notice also that the full melody here repeats 3 times, every time building in dynamics and adding instruments until we reach the climax. Notice that the horn doesn’t take part in the orchestral tutti – its sound is saved for the solo that comes after:

January 2018 - Music Composition Challenge

And after the horn solo, the piece finishes off with a brief reminder of the fragments from Section A.

That’s it!

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