How Swing Works
The polyrhythm of three time signatures
Great time and feel should present as relaxed to the listener. Underpinning this dancing beat is an extremely nuanced and sophisticated rhythmic concept, highly personal and effortlessly expressive.
There are many ways to think about swing feel and how it works. Just one way is to think of swing as being constructed from 3 different time signatures. These time signatures are: 4/4, 6/8 and 2/4. When musicians make rhythmic elements from these time signatures interlock, it creates a beat. You must develop a strong practical understanding of all of these time signatures and the polyrhythm they create in order to strengthen your sense of time.
6/8The Triplet Feel and Your Swing Eighth Notes
Underpinning a great swing feel is a constant stream of 8th note triplets that are felt but not all explicitly played. This makes the base unit of swing the triplet, and makes each beat of the bar divided into three parts rather than two - 6/8.
Think about the classic ride cymbal beat, which sets up a consistent, smooth texture for the 8th note feel. Here's how the ride cymbal beat is mapped against the underlying triplets. This example shows how each beat of 4/4 is divided into 3 units, instead of two like regular 4/4. This makes a bar of 4/4 swing feel like two bars of 6/8.

Your ability to play 6/8 influences your 8th note feel. The more consistently you can feel the underlying triplets, the more consistent your 8th note placement is going to be. As horn players, we generally tend to play lines constructed from 8th notes, so being able to create a smooth texture is essential. Being able to dip in and out of the texture precisely allows you to play punchy rhythms that lock in with the ride cymbal or piano comping rhythms. In the past, horn players developed a great 8th note feel from regular sectional playing in big bands.
At an advanced level, your 8th note placement becomes a vital part of your own personal style, helping shape your personal voice. Cannonball Adderley placed his 8th notes really far back in the beat, around the 16th note triplet. Barry Harris' 8th note feel was different in each of his hands, his left being quite on top of the beat and his right with a much later 8th note.
Listening and responding to where drummers and bassists play their skip beats is one of the great joys of playing small group jazz. The first step is to try to master playing 8th notes based off the triplet.
4/4The Quarter Note Pulse That Drives the Beat
4/4 is the most obvious of the time signatures that form the polyrhythm, as we mostly think of jazz music as being 'in 4.' 4/4 drives the beat forward. It gives that feeling of forward momentum and excitement, particularly at faster tempos. Think of the walking basslines that underpin everything we play, or the bass drum feathering at the bottom of the texture.
As horn players we don't tend to construct lines in quarter notes, as this role is already being fulfilled by the bass. This makes it even more important to practice this element of the polyrhythm. Underpinning your 8th note lines must be a strong sense of the crotchet. Without it, the tempo will sag, you will end up dragging behind the band rather than locking in with it. The strength of your quarter note feel is what makes the beat drive forward with intensity and purpose, adding accents and shape to your lines.
Listen to how Benny Carter plays, with that pushy quarter note feel really on top of the beat, combined with a really tripletty and relaxed 8th note feel. Dexter Gordon's often-imitated rhythmic style is characterized by a really laid back quarter note feel, deliberately and consistently behind the beat. Listening to him you get that sense of his lines being pulled along by the band. That rhythmic tension and release explains his enduring popularity.
2/4Beats 2 and 4 Make the Beat Dance
Seeded from military marches and parade bands in New Orleans in the early part of the century, the 2/4 march feel was flipped to create an emphasis on beats 2 and 4, rather than 1 and 3 as in a traditional march. This emphasis on 2 and 4 is what makes the jazz beat dance. Think of the hi-hat closing on 2 and 4. This backbeat is what makes the music swing, particularly at medium tempos.
The 2/4 feel is one of the key things that separates jazz from classical music rhythmically. It's the reason jazz makes you want to move. Without it, even perfectly played lines with a great triplet feel and a strong quarter-note pulse will sound stiff and academic.
Jackie Mclean played with a laid-back quarter note feel combined with a very consistent triplet, giving his solos a perfect sense of urgency.










