Fragmentation and Melodic Development

Fragmentation is an interesting tool which composers can use to generate a plethora of melodic material with very little effort. In my opinion, there are two primary types of fragmentation, subtractive and motivic.

Subtractive fragmentation is easy to do and, if used properly, creates syncopation. All you have to do is substitute rests for notes. Example No. 1 is an original melody which I have used in a number of previous blog posts. Example No. 2 is the same melody with rests replacing some of the notes. Play both examples and listen to the difference. Example No. 2 is clearly the same melodic idea, but it has more rhythmic punch because the rests create accented upbeats in measures 2 and 4. The quarter rest in measure 3 creates additional rhythmic interest.

Example No. 1

Original

Example No. 2

Subtractive Fragmentation

Motivic fragmentation is more common than subtractive. In fact, it is an integral part of classical period repertoire and is common in compositions by Haydn, Mozart, and Beethoven. In general, the primary thematic structures used in classical period music where the sentence and period. It is beyond the scope of this blog post to discuss thematic structures in classical period music, but, in general, a basic idea is introduced (usually two measures), repeated creating a four measure theme, then a fragment of the basic idea is extracted and sequenced three times to create a classic eight-measure sentence structure. In example No. 3, the eighth notes in measure 2 are extracted and sequenced three times to create an ascending melodic line which cadences in measures 7-8. This creates a sense that the melody is accelerating toward a cadential point.

Example No. 3

Motivic Fragmentation

Comment if you can think of any other types of fragmentation. In the meantime, apply these techniques to your own compositions and listen to the results. Happy composing!

How to Develop a Melody Using Sequencing

Sequencing is another time-honored tool that most composers use on a regular basis. Sequencing is the immediate repetition of a motive at a higher or lower pitch level. The motive can be almost any length the composer desires as long as it is not a complete repetition of the entire phrase. Often the motive is quite short, just a few beats or a single measure.

I particularly like to use ascending sequences. They create a sense of growing intensity and anticipation, as if something important is about to happen. They work well as transitions to new sections or as a build up to an important climactic moment.

There are a number of different types of sequences. Two of the most used sequences are exact and tonal. Example No 1 is an original melody which I used in my first blog post to demonstrate inversion, retrograde, and retrograde inversion. Example No. 2 is the same melody subjected to exact sequencing. All of the intervals in each sequence are exactly the same as the original melody. Accidentals have to be added to maintain the intervallic relationship among the notes. This is sometimes referred to as a modulating sequence because, with the addition of so many accidentals in measure 4, the phrase has essentially modulated to the key of C# major.

Example No. 1

original

Example No. 2

sequencing exact

Example No. 3 is the same melody subjected to tonally adjusted sequencing. None of the sequences have accidentals; therefore, the phrase remains in the key of F# minor.

Examples No. 3

tonally adjusted sequencing

Three and out is the general rule for sequencing. In other words, whatever you decide to sequence should only be sequenced three times; anything longer feels predictable and tedious.

In addition, it is advisable to vary the sequences. Change some of the notes or invert one of the sequences to keep the listener off balance. Most people are sophisticated enough to understand that a sequence is in progress and can predict what it will sound like as it unfolds. If one of the sequences, usually the third, is a little different, it will keep the audience off balance and engaged. If they can predict exactly what you are going to do next, you have lost them. Keep them engaged with unpredictable twists and turns. Example No. 4 demonstrates this concept. The last sequence is inverted; all of the intervals are upside down.

I encourage you to play through these examples, then apply sequencing to one of your own melodies and see what happens. Enjoy!

Example No. 4

exact with inversion