GCSE Theme & Variations Composing Guide

Compose the Melody of your Theme

1. On the treble (right hand) piano stave, compose a melody. 

2. On beats 1 and 3 of each bar, use a note from the guide chords.

3. Move mainly by step and by small jumps, creating scales in long arch shapes.

4. When moving by jump, jump to a note from the chord.

5. Avoid repeating the same pitch consecutively.

6. Use distinctive rhythmic motifs.

7. Repeat motifs as sequences (higher/lower in pitch).

8. Create phrases by using a longer note at the end of even numbered bars (especially 4, 8, 12, 16 etc.).

9. Repeat motifs in antecedent and consequent (call and answer) phrases.

10. When the chord pattern repeats, the melody should repeat.

Develop the Theme Texture

1. Look at example theme and variations by Mozart, Beethoven, Brahms and Rachmaninov found here. Sometimes these composers use two part textures. However, their textures are normally 3-part or more.

2. Develop your texture by adding a second line of music (known as a 'second voice') to the treble stave. (Select a bar and press 'L' to create a lower voice).

3. The second voice should fill in the 'missing' harmony, using mainly notes from the chord in simple rhythms. (If the 3rd of the chord is missing [E in CEG] it should fill in this note first).

4. When the melody is simple (crotchets, quavers) the second voice can move in parallel 3rds and 6ths (avoid parallel 4ths and 5ths)

5. When the melody is more complex (quavers, semi-quavers), the second voice should remain simple (minims).

Techniques for Composing Variations

Compose a melody with new, distinctive rhythms

Compose a new melody with a new, distinctive, recurring, motif, moving mainly by step. A new, recurring dotted, triplet, dactyl (long-short-short) or anapest (short-short-long) rhythmic motif, using quavers and/or semiquavers, will make your melody distinctive. Use a new accompaniment pattern to create contrast.

Compose a melody with new, distinctive intervals

Compose a new melody with a new, distinctive, recurring, motif, combining arpeggiaic and stepwise movement. Using a new rhythmic motif (a different one from the list above) will also help to  make your melody distinctive. Use another new accompaniment pattern to create contrast.

Compose a melody and/or accompaniment with chromatic passing/auxiliary notes

Compose a new melody with a new, distinctive, recurring, motif, using stepwise motion decorated by chromatic passing and/or auxiliary notes. Replace diatonic scalic movement (e.g. CDE) with chromatic scalic movement (e.g. CDD#E). Between two notes of the same pitch (GG), place a chromatic auxilliary note: one semitone higher or lower in pitch (e.g.GF#G). Use another new accompaniment pattern to create contrast.

Invert the melody and accompaniment

Repeat the melody from your theme or from another variation on the bass stave. Compose a new accompaniment on the treble stave.  The melody alone should be copied to the bass stave (without a second voice or accompaniment) and transposed to a suitable octave (Ctrl down). On the treble stave, compose a new accompaniment, using a distinctive pattern which repeats every bar, such as an arpeggio, broken chord or alberti pattern.

Antiphony between left and right hands

Compose a variation in which the musical line is 'passed' between the left and right hands in antiphony: whilst the left hand plays, the right hand rests and vice versa. Use scale and arpeggio patterns which ascend in the left hand and descend in the right hand, creating a single line of music.

Scales in moto perpetuo

'Moto perpetuo' means 'constantly moving'. On the treble or bass stave, compose a melody line from continuous quaver, triplet or semiquaver scales. Combine major, minor and chromatic scales to arrive at a note from the chord on beat 1 of each bar. Accompany the melody with a light accompaniment (such as a single staccato chord on the first and last beats of each bar, separated by rests).

Treble block chords with bass broken chord accompaniment

Copy the block chords from your guide stave onto your treble stave. Repeat these chords in a simple, repeating, rhythmic pattern. When repeated, rearrange each chord, placing a different note at the top (e.g. CGE becomes ECG). Accompany these block chords with broken chords on the bass stave.

Extension Tasks

These extension tasks are challenging: first use the techniques above before attempting them.

Modulation*

• Repeat your guide chords on the guide stave and transpose them to a new, related key. To modulate to the tonic minor, change the key signature and remove/add accidentals as required (shortcut: shift, select all, arrow up, arrow down). To modulate to the dominant, subdominant or relative minor keys, select and transpose the chords, including the key signature. In minor keys, remember to raise the 7th.

• Use any of the techniques above to compose a variation on this new chord pattern. Use the harmonic minor to compose chords (raised 7th) and melodic minor (raised 6th and 7th ascending, normal 6th and 7th descending) where possible to compose melodies, avoiding augmented intervals.

• To modulate from one key to another, you will need to modify the end of each chord progression. Use a 'pivot chord' (a chord which belongs to both keys) followed by the dominant chord of the new key. This, in turn, will lead to the new tonic chord.

 Reharmonisation*

If the melody of your theme is very distinctive, consider repeating and reharmonising it to create a variation. Consider reharmonising the theme with non-functional, non-diatonic, dissonant harmony. Use many extended chords, chromatic chords and added note chords to help you to avoid functional progressions.

*Extension tasks