Syncopation, Offbeats and Groove

You may already know this frustration: a beat locked perfectly to the grid, without a single mistake, and yet it doesn't move. Listen to this bar of drums. Everything lands right, every hit has the same strength, and the result is clean, but a little mechanical.

Here's exactly the same skeleton, with three changes: some hi-hat hits louder and others softer, two tiny snare hits added, and a light swing that delays every other sixteenth note. Not a single kick or main snare hit has moved.

The difference comes down to details, and each of those details has a name. To understand them, you first need to know that the cells of the grid don't all carry the same weight.

Strong beats and weak beats

In a bar of 4/4, classical tradition calls the first and third beats the strong beats, and the second and fourth the weak beats. The one is the strongest of all, the three a little less. If you tap your foot while counting, you naturally feel that heavier weight on the one.

The same hierarchy exists inside each beat. The start of the beat is the strong part; the “and”, in the middle, is weaker; the “e” and the “a” are the weakest parts. The accented hi-hat you just heard followed exactly that hierarchy: loud on the beats, medium on the “ands”, soft on the rest.

Pop, hip-hop and electronic music play with this hierarchy instead of obediently following it. The best example is the snare or clap on two and four, called the backbeat: you hit hardest exactly on the beats that tradition calls weak. That reversal is one of the sources of energy in this music, and we'll meet it again in the lesson on drum patterns.

The offbeat: playing between the beats

An offbeat is a sound placed on a weak part, between the beats, while the beat itself stays silent for that instrument. The best-known example in electronic music is the open hi-hat in house, which hits on every “and” while the kick hits every beat. Listen to how the two answer each other.

The offbeat works with a bass too. In the next figure, the bass never plays at the same time as the kick: it always comes in on the “and”, like an answer. It's a very common way to keep the kick and the bass from stepping on each other in the low end, while creating a seesaw motion.

Syncopation: a displaced accent

Syncopation goes further. It's a sound that starts on a weak part and carries over the next strong part. The result: at the moment the ear expects an accent, on the beat, nothing new happens, because the note already started before. The accent has been moved earlier.

First, listen to Am (A minor) chords played obediently on every beat, over a kick. These are stabs, that is, short, punchy chords.

And now the same chords, with a syncopated rhythm. The second chord starts on the a of one and holds over the second beat; the last one starts on the and of three and holds over the fourth. Beats 2 and 4 no longer get a chord attack, and the whole thing starts pushing forward.

Syncopation is everywhere in the music you produce: house stabs, reggaeton and Afro bass lines, pop melodies. When a part feels too tame, moving a note earlier by a sixteenth or an eighth, and letting it hold over the beat, is often the quickest way to give it momentum.

Swing: delaying every other note

Swing means slightly delaying every other subdivision. On a sixteenth-note grid, it's the “e”s and the “a”s that arrive a little after their place, while the beats and the “ands” stay put. The sixteenth notes are no longer even: the first of each pair gets longer, the second shorter, and the rhythm starts to sway.

Listen to a line of sixteenth-note hi-hats, first with no swing at all.

With a lot of swing, the same sixteen hits start to limp in a regular way, almost like a triplet.

Software expresses swing as a percentage, but not every program scales it the same way. In many programs, 0% means a straight rhythm. On MPC-style drum machines, and in software that follows their convention, a straight rhythm is 50%, and values around 66% give a triplet feel. So don't trust the number: trust your ear.

A little swing is often enough to loosen up a house or hip-hop beat without anyone hearing it as an effect. Boom bap and lo-fi often use more, which gives them their laid-back drag. Ideally, apply the same swing to every part that plays sixteenth notes; otherwise the hi-hats and the bass may stop landing together.

Humanizing: small, deliberate imperfections

A drummer or a pianist never plays exactly on the grid, or always with the same strength. Those small variations, a few milliseconds here and a little force there, are part of what makes playing sound human. So software offers humanize functions, which shift notes slightly and vary their strength a little, at random, within limits you choose.

Use them sparingly. A shift that's too big doesn't sound human anymore, it sounds wrong, especially on the kick, which usually needs to stay locked in. Often, the most effective approach is to play the part by hand, then quantize it only partway, as we saw in the lesson on bars and steps.

Velocities, accents and ghost notes

You met velocity with MIDI notes: it's how hard a note is played, from 1 to 127. On drums, it's your first groove tool. An accent is a hit that's clearly louder than its neighbors: it draws the ear and highlights a spot in the bar. On the other hand, a ghost note is a very soft hit, felt more than heard, slipped in between the main hits.

Listen to the snare in this figure. The two main hits land on two and four, and three very soft ghost notes slip in around them. They don't change the skeleton of the rhythm; they fill it in, like a drummer letting the stick bounce on the drum.

Now it's your turn to experiment, with an empty drum machine.

When you've found a setting you like, try to recreate it in your own software, on one of your beats.

You now have all the vocabulary you need for the next lesson, where we'll build the most widely used drum patterns, genre by genre.