Key Stage 3 music · Interrelated dimensions of music

KS3 music: ostinato, riffs and other musical devices

Musical devices are the techniques composers and performers use to build interest and express a mood. In Years 7 to 9, pupils learn to identify and use devices such as ostinato, riff, drone, sequence, imitation and syncopation, and to explain what effect each one has. The aim is for pupils to use them on purpose in their own composing and to spot them when they listen.

Ostinato, riffs and musical devices, explained

The National Curriculum asks pupils to use the interrelated dimensions of music “expressively and with increasing sophistication”, including “other musical devices”. It does not list the devices, so each school chooses. Those named on this page are the ones that appear most often, but your child may meet a different selection, for example inversion, canon, pedal notes or call and response.

Several devices are built on repetition. An ostinato is a short pattern, which can be rhythmic, melodic or both, repeated many times, often under changing music above it. A riff is a short, catchy repeated phrase, especially in rock, pop, funk and jazz, and is often the main hook of a song. The two overlap, and in lessons the words are sometimes used loosely. A drone is a long, held or constantly repeated note, often in the bass, that gives a sense of stability. A pedal note is related: a sustained note, usually in the bass, while the harmony above it changes.

Other devices change an idea so it develops. A sequence repeats a short phrase at a higher or lower pitch, for example the same shape starting one step higher. Imitation is when one part copies another a moment later, and a canon is strict imitation, as in a round. Inversion turns a melody upside down, so rising steps become falling ones, and augmentation and diminution make the notes longer or shorter. Call and response is a question-and-answer pattern, between a leader and a group or between instruments.

Syncopation is a device of rhythm. It places emphasis on beats that are normally weak, or on the spaces between beats, so the music feels off-balance, lively or jazzy while the steady pulse carries on underneath. Many pupils first meet it in funk, jazz, reggae and Latin American styles, though it appears in nearly every tradition.

In school, pupils practise recognising devices when they listen, then use them in performing and composing. A typical task is to take a four-note motif and develop it with three devices, or to add an ostinato to a melody. Marks tend to reward choosing a device for a reason and being able to say what it does, rather than packing a piece with as many as possible.

Words your child will hear

Ostinato: A short pattern repeated many times, often as an accompaniment.
Riff: A short, catchy repeated phrase, often the hook of a pop, rock or jazz piece.
Drone: A long held or constantly repeated note, usually low, that stays the same under changing music.
Sequence: A phrase repeated at a higher or lower pitch.
Imitation: One part copying a musical idea just after another part has played it.
Syncopation: Emphasis on weak beats or off-beats, so the rhythm feels unexpected while the pulse stays steady.
Inversion: Turning a melody upside down, so that rising steps become falling steps.

What the National Curriculum says

The programme of study for Key Stage 3 says:

Pupils should be taught to identify and use the interrelated dimensions of music expressively and with increasing sophistication, including use of tonalities, different types of scales and other musical devices
Pupils should develop their vocal and/or instrumental fluency, accuracy and expressiveness, and understand musical structures, styles, genres and traditions, identifying the expressive use of musical dimensions.

Objectives from the National Curriculum in England, © Crown copyright, used under the Open Government Licence v3.0.

Try it: developing a four-note motif

A pupil has a motif of four crotchets in C major: C, D, E, C. How can they use musical devices to turn it into a longer passage?

Start with the motif and say what it does. It rises by two steps and then falls back to the home note. The shape is short and clear, so it is easy to remember and to recognise when it changes.
```
Motif:  C D E C
```
Use a sequence. Repeat the shape starting one note higher, so D, E, F, D. This keeps the shape but changes the pitch, giving the music a sense of climbing.
```
Motif:    C D E C
Sequence: D E F D
```
Use inversion. Turn the shape upside down, so that it falls in steps instead of rising: C, B, A, C. The idea is recognisable but feels like a reply to the first.
```
Inversion: C B A C
```
Use augmentation. Play the original with each note twice as long, so the four crotchets become four minims. The same idea feels calmer and more important, which suits an ending.
Add an ostinato. Underneath, repeat a two-note bass pattern, C then G, throughout. It holds everything together while the melody above is developed.

The pupil has a passage built from one idea: the motif, a sequence (D, E, F, D), an inversion (C, B, A, C), an augmented version with longer notes, all over a repeating C and G ostinato. A good explanation says what each device adds, such as climbing, replying, slowing down and holding the music steady.

Common mistakes and how to help

Thinking ostinato and riff mean exactly the same thing

Both are short repeated patterns, and pop musicians and teachers sometimes use the words interchangeably.

What helps: Ostinato is the wider term and can be any repeated pattern, usually in the background. A riff is a catchy repeated phrase that is often the main hook. The distinction is not strict, so focus on what the pattern does in the music.

Confusing a sequence with simple repetition

Both involve repeating an idea, and a sequence can sound very like the original.

What helps: In a sequence the idea moves to a different pitch. Play a short phrase twice on the same notes, then again starting a step higher, and ask which is the sequence.

Believing syncopation means playing out of time

The word sounds like a mistake, and syncopated rhythms can feel like they are going wrong at first.

What helps: The steady pulse carries on, usually tapped by a foot or a drum. The accents fall between the beats. Tapping a steady pulse while clapping a syncopated rhythm shows how they fit together.

Thinking that using more devices makes better music

A checklist of devices can look like a way to earn marks, so pupils pile them in.

What helps: Ask what each device does. A single well-chosen ostinato or sequence that supports the mood is better than five devices that fight each other.

How to help at home

Find the hook. Choose a favourite song and pick out its riff or ostinato. Can your child hum or tap it? Ask whether it repeats exactly or changes slightly, and what the rest of the music does around it.
Round and round. Sing a well-known round, such as Frère Jacques or London’s Burning, in two or three groups, each starting a bar or two later. This is imitation and a canon, and it works at any age.
Hum a drone. One person hums a steady low note while another sings a simple tune above it. Notice how the drone gives a firm base even as the tune moves.
Tap the pulse, clap against it. Tap a steady beat with your foot and clap rhythms that land between the taps. This is syncopation, and it is much easier to understand by doing than by hearing it described.
Change one thing. Pick a short tune, then change it in one way: start it higher, sing it upside down by switching ups for downs, or slow it down. Take turns naming the change. This is how development works in composition.