Instruments of the Orchestra for Kids: The Four Families
Strings, woodwinds, brass, and percussion, with what to listen for in each.
By Maestro
An orchestra can look overwhelming: dozens of players, dozens of instruments. But every instrument belongs to one of four families, and each family makes its sound in its own way. Once a child knows the families, they can start to pick out instruments by ear.
What are the four families of the orchestra?
The orchestra is organized into strings, woodwinds, brass, and percussion. Instruments are grouped by how they make sound: by vibrating strings, by air through a tube, by the player's buzzing lips, or by being struck, shaken, or scraped.
The string family
Violin, viola, cello, and double bass. Strings make sound when a bow is drawn across them or when they are plucked. The violin is the smallest and highest; the double bass is the largest and lowest.
Strings are the biggest family and the heart of the orchestra. They can sing long, smooth melodies, play fast and light, or pluck short notes (called pizzicato).
Listen to: the opening of Mozart's Eine kleine Nachtmusik, written for strings alone.
The woodwind family
Flute, oboe, clarinet, and bassoon. Woodwinds make sound with air. The flute is played by blowing across a hole. The clarinet uses a single reed, and the oboe and bassoon use a double reed, which vibrates when the player blows through it.
Each woodwind has a distinct personality. The flute is bright and airy, the oboe reedy and singing, the clarinet warm and smooth, and the bassoon low and often playful.
Listen to: Prokofiev's Peter and the Wolf, where the bird is a flute, the duck an oboe, the cat a clarinet, and the grandfather a bassoon.
The brass family
Trumpet, French horn, trombone, and tuba. Brass players buzz their lips into a cup-shaped mouthpiece, and the sound travels through a long, coiled metal tube. Pressing valves (or moving a slide, on the trombone) changes the length of the tube and the pitch.
Brass is the most powerful family. It can blaze in fanfares or play softly and warmly. The French horn in particular can sound noble and gentle.
Listen to: the opening fanfare of Richard Strauss's Also sprach Zarathustra, or the horn calls in Mozart's horn concertos.
The percussion family
Timpani, snare drum, bass drum, cymbals, triangle, xylophone, and many more. Percussion instruments are struck, shaken, or scraped. Some, like the timpani and xylophone, play specific pitches. Others, like the snare drum and cymbals, add rhythm and color.
Listen to: the steady snare drum that runs through Ravel's Boléro from the first bar to the last.
How can children learn to hear the families?
- Listen for one family at a time. Play a piece and ask your child to raise a hand whenever they hear brass.
- Compare high and low within a family: violin and double bass, flute and bassoon.
- Watch a performance. Seeing the players makes it much easier to connect sound and instrument.
- Name the mood. Ask why a composer chose that instrument for that moment.
That last question is the beginning of orchestration: choosing which instruments play which notes.
Why does this matter for young composers?
Knowing which instrument plays a melody is as much a part of composing as writing the notes. The same tune sounds completely different on a flute and on a tuba. Children who learn the orchestra early begin to imagine their own music in color.
Where Gradus fits
In Gradus, orchestration is woven into composition from the start. Young Composers meet the orchestra by ear, and older students learn which instruments to choose and how to combine them, with a complete orchestration reference to explore. Your child writes music from the very first lesson, and Maestro, your child's personal composition tutor, does the teaching.
You can look up orchestration in the Gradus dictionary or see a sample lesson.