Music runs on two independent systems — pitch (how high) and time (when notes fall and how long they last). We start with time: the simpler one, underneath everything you play.
What you’ll learn in this section
- Note values as a doubling system — semibrave, minim, crotchet, quaver, semiquaver
- Dotted notes and ties — how to extend any note value by a half or link values together
- Why quavers are beamed into beats, and how triplets fit three notes where two would go
- Clapping rhythms against a steady pulse to feel the values in your body
- Triplets and duplets — borrowing a three-feel or a two-feel
- Compound time and finer subdivisions
- Rests, irregular metres and advanced beaming
How do you write down a sound?
Music is invisible. A sound happens, fills the air for a moment, and is gone.
Here is a tune you already know. Listen first — don't read anything yet.
Now imagine you had to write that down — on paper, with no recording — so a stranger could play it back exactly. What would you need to capture?
For most of history this was music's hardest problem. Tunes lived only in memory and in the ear, passed from player to player, slowly drifting out of shape.
How high, how long, and when
Every note answers just three questions:
Listen first to this short rising line — don’t read anything yet.
Here two of the three change at once: each note is higher than the last (pitch), and each one arrives after the last (placement) — while their length stays the same. Now see the rising shape you just heard — lit on the keyboard and drawn on the stave:
Western notation was built to capture both at once. The next page shows the trick.
The stave is a map
Over centuries, Western music settled on one elegant solution: a grid with two directions, read like a map.
Up the page = pitch. The higher a note sits, the higher it sounds — the vertical axis.
Across the page = when it is played. The further right a note sits, the later it sounds. Its position is really the time used up by everything before it — the horizontal axis.
The note’s shape = how long. Its design — filled or open head, stem, tails — tells you its duration. That is what most of this section is about.
Bar lines grid the time axis. Just as the stave lines help your eye place a note’s height, bar lines split the horizontal axis into equal groups of beats — so you can see exactly when each note falls. How many beats per group is set by the time signature.
Hear the picture above: the notes climb the page and march to the right.
One axis at a time
Three things at once is a lot to learn. So we set pitch aside and study time first — both of its parts: how long each note lasts, and where it falls.
For the rest of this section, pitch is parked. We will master note values (how long each note lasts) and beats, bars and subdivision (where each note falls) on a single line — then bring pitch back when you read the full stave.
To focus on time alone, we flatten the stave to a single line. The notes no longer tell us how high — only how long each one lasts (its shape) and when it falls (its placement).
This is not a shortcut we invented — it is real notation. Instruments with no pitch, like a snare drum or hand claps, are written exactly this way: one line, rhythm only.
Note values — the doubling system
Note lengths are not a list of separate facts. Each note value is exactly double the next shorter one. This is a system of proportions, and once you see it as a system the individual values follow automatically.
| Note | Name | Relation | Beats in 4/4 |
|---|---|---|---|
| Semibreve | = 2 minims | 4 | |
| Minim | = 2 crotchets | 2 | |
| Crotchet | = 2 quavers | 1 | |
| Quaver | = 2 semiquavers | ½ | |
| Semiquaver | = 2 demisemiquavers | ¼ |
Five note values to know cold: semibreve (4 beats), minim (2), crotchet (1), quaver (½), semiquaver (¼). That said, the vast majority of music is built from just quavers, crotchets and minims — so you can already do a lot with those three.
How quavers and semiquavers are joined
On their own, quavers and semiquavers carry little flags on their stems — one flag for a quaver, two for a semiquaver. When several of them sit next to each other, the flags are replaced by beams: thick lines joining the stems. One beam means quavers; two beams mean semiquavers. The stem — and any beam bridging a group — can sit above or below the note-heads: by convention notes high on the stave take downward stems and lower notes take upward ones, which keeps the stems and beams clear of the lines.
Beaming is not decoration — it is grouping. Notes are joined so that each group adds up to one beat, which lets you read the beats at a glance instead of counting flags. We will come to the exact beaming rules later, in the Time signatures section; for now, just know that a beam shows you where a beat is.
The doubling system in motion
Two bars of 4/4, all five note values stacked at once. Press play: each layer subdivides the one above — the semibreve holds the whole bar while sixteen semiquavers tick past beneath it. The moving line is “now”; read down it to see which note in each layer is sounding. Tap the ♪ at the end of any row to hear that layer as clicks, and turn several on together to feel them lock in.
See and hear the breakdown in action
Feel it: clap the values
Rhythm is understood far faster through the body than through the page. Set a slow, steady beat — tap your foot, or count "1, 2, 3, 4" aloud at walking pace — and clap these patterns against it. Keep the foot-tap perfectly even; it is the ruler everything else is measured against.
One beat at a time
Clap once on every count: clap–clap–clap–clap, one per beat. These are crotchets, one beat each.
Half beats
Now clap twice as fast, two claps per count: 1 & 2 & 3 & 4 &, clapping on both the number and the "&". These are quavers, half a beat each. Notice you fit exactly two into each foot-tap.
Holding across beats
Clap on count 1 and hold — no clap on 2 — then clap on 3 and hold through 4. Each clap now lasts two beats: these are minims. Your foot keeps tapping all four beats underneath while your hands move only twice.
Now clap it back
Time to test your ear. Press Listen to hear a short rhythm, then Tap it back: a count-in leads you in, then tap the pad in time. Every note you land in time lights green.
The dot: add half again
A dot placed after a note adds half its own value to it. So a dotted crotchet (one beat) gains half a beat, lasting one and a half beats in total. A dotted minim (two beats) gains one beat, lasting three beats. The rule is always the same: dotted = ×1½.
Dot = ×1½ the note's value. Tie = add two values together. Use a dot within a bar; use a tie to cross a bar line.
| Note | Undotted value | Dotted value |
|---|---|---|
| Dotted minim | 2 beats | 3 beats |
| Dotted crotchet | 1 beat | 1½ beats |
| Dotted quaver | ½ beat | ¾ beat |
Clap on beat 1 and hold through the “&” of beat 2 (one and a half beats), then clap on the short “&” before beat 3. That long–short lilt is the dotted rhythm — the heartbeat of a great deal of music from nursery rhymes to national anthems.
Train your ear
Even, dotted, or triplet? Press Play and name what you hear.
The tie: add two values together
A tie is a curved line joining two notes of the same pitch into a single sustained sound. Their values add together: a crotchet tied to a quaver lasts one and a half beats, just like a dotted crotchet.
So why use a tie when a dot would do the same job? Two reasons: ties can cross a bar line (a dot cannot), and ties can span any two values — useful when the combined length does not match a clean dotted-note value or when the beat boundary must remain visible on the page.
Use a dotted note when the combined length fits within a single bar and a dot captures it cleanly. Use a tie when the note must cross a bar line, or when keeping the beat divisions visible in the notation is more important than brevity.
Rhythm patterns — the same beat, eight ways
One bar of 4/4, and every row fills the same four beats with a different rhythm. The mixed rows show how beams spell out each beat: a partial second beam marks the semiquaver inside a dotted pair. The 3 above a group means a triplet — three notes squeezed evenly into the time of two; the 6 means a sextuplet, six in the time of four. Tap ♪ on any rows and play them together — crotchets against triplet quavers is the classic two-against-three feel.
Hear the eight patterns
Hear each filling on its own
The chart on the last page stacks every way to fill a beat. Here is each one on its own, set against a steady four-crotchet click: the top line is the pulse, the bottom line is the pattern. Tap Play and clap the bottom line against the click.
Triplets: three in the time of two
The doubling system divides beats into equal halves, quarters and eighths. But composers also need to divide a beat into three equal parts. Three notes played in the time of two is a triplet, marked with a bracket and a small 3 above the group.
The most common is the quaver triplet: three quavers squeezed into the time of two (one crotchet beat). Subdivide further and you get the triplet semiquaver — six even notes in a single beat. The feel is a gentle triple subdivision against the underlying duple pulse — the “1-and-a” feel common in blues and ballads.
Triplet = three equal notes where two would normally go. Look for the figure 3 above or below the beam.
Two, then three
Hear the two subdivisions one after another. Beats 1 and 2 stay as steady crotchets in both bars. In the first bar, beats 3 and 4 each split into two even quavers; in the second bar, the same beats each split into a triplet of three. Same beat, divided two ways — press play and let it loop.
Six ways to fill the bar
Each row holds two bars. Press play on a row to loop its pair and compare the feel — a steady reference next to a new subdivision.
Loop it: one beat, four ways
The same bar, looping. Press Play, then switch between the four subdivisions while it loops — the pulse stays put, only the filling changes.
Build your own four-bar rhythm in 4/4 — fill each beat from a palette of one-beat patterns (crotchet, quavers, triplet, semiquavers, dotted), then play it back at any tempo.
Build a one-bar drum groove on four voices at once — hi-hat, snare, bass drum and crash — then loop it. Load a rock, jazz or half-time shuffle preset to hear how the pieces lock together.
Hear a clave-locked percussion section — son or rumba clave, the bongo martillo, timbale fills and cowbell on the beat. The clave is the two-bar pulse everything else answers to.
See and hear the breakdown in action
One crotchet beat, divided three ways. Press play on each row and listen to how the beat splits into one, three, then six even notes.
Hear the eight patterns again
Now that triplets and sextuplets are in the mix, here are all eight ways to fill a beat once more. Tap ♪ on any rows to add them to the loop and compare.
Check your understanding
A piece is in 6/8 and the performer counts two felt beats per bar. Is this simple or compound time?
Now put pitch back
To learn time, we flattened the stave to a single line. Every clap landed in the right place — but they all sat at the same height.
Now lift that line back into two directions. Keep the beat exactly the same, and let each note sit at its own height. Listen to what happens.
Time runs across, pitch runs up. Every melody you will ever read lives on that one map — and you have now met both of its directions.
Time & rhythm in Essentials — Note values, simple time signatures, triplets, beaming rules. Revisit →
Time and pitch are independent systems — you already know that from Essentials. This section goes past simple time into the structures that catch players out: compound metre, irregular bars, and fine subdivision.
Triplets
The subdivision system divides beats into equal halves, quarters and eighths. But composers also need to divide a beat into three equal parts. Three notes played in the time of two is a triplet, marked with a bracket and the number 3 above the group.
The most common is the quaver triplet: three quavers in the time of two (one beat). The feel is a gentle triple subdivision against the underlying duple pulse — the “1-and-a” feel common in blues and ballads.
Triplets are the feel behind shuffle rhythms. A straight quaver pair is even; triplet quavers lean long-short at 2:1 rather than 50/50.
The triplet bracket with the number 3 is the signal. Without the bracket, it's just three regular notes in sequence.
Duplets
A duplet is the exact mirror image of a triplet — it does in compound time what a triplet does in simple time:
So in 6/8 or 12/8, where each dotted-crotchet beat is normally three quavers, a duplet (bracket with a 2) splits that beat into just two equal notes instead. It is the opposite manoeuvre to the triplet: where a triplet imports a three-feel into duple time, a duplet imports a two-feel into compound time. They appear in music that shifts momentarily between compound and simple feel.
Check your understanding
A 9/8 bar contains how many dotted crotchet beats, and how many quavers fill each beat?
Compound time — the structural difference
In compound time the beat is a dotted note. In 6/8 the beat is a dotted crotchet (worth three quavers). There are two such beats per bar — not six separate quaver beats. This distinction is genuinely important: a performer conducting 6/8 beats in two; a performer conducting it in six is being pedantic about the subdivision, not the pulse.
The implication for reading: when you see six quavers in a 6/8 bar, you do not read them as six equal beats. You read them as two groups of three, the first quaver of each group landing on the beat.
Compound duple = 6/8 (two compound beats). Compound triple = 9/8 (three). Compound quadruple = 12/8 (four). The adjective refers to the number of beats; "compound" refers to the triple subdivision of each.
Irregular groupings
A "triplet" is three notes played in the time of two of the same value — three quavers in the time of two quavers, for example. This temporarily imposes compound subdivision on a simple-time bar. A "duplet" is the reverse: two notes in the time of three, imposing simple subdivision on a compound beat. Both are notated with a number above the group (3 or 2).
Finer divisions: down to demisemiquavers
The doubling system has no floor. Past the quaver, each level halves again: a semiquaver is a quarter of a crotchet (two per quaver), a demisemiquaver halves that again (four per quaver), and a hemidemisemiquaver halves it once more. Each adds one more flag or beam to the stem.
You rarely count these individually. Instead you feel the beat and subdivide it: four semiquavers per crotchet is “1-e-and-a”; demisemiquavers simply double the speed of that grid. The doubling logic from the basic note values runs all the way down — nothing new to memorise, just more halving.
✔ Quick check: In 4/4, how many crotchet beats are in each bar?
Rests and barlines
Silence is written as deliberately as sound. Every note value has a matching rest of the same length — a crotchet rest, a quaver rest, and so on — telling you exactly how long to stay quiet. A rest is not a gap in the instructions; it is an instruction, with a precise duration.
The vertical barlines divide the music into bars (also called measures), each holding the number of beats the time signature promises. They are the music's regular punctuation, making the pulse visible on the page. A double barline marks the end of a section, and a final barline (thin then thick) marks the end of the piece.
Irregular metres (5/4, 7/8) feel asymmetric because the beat groups are unequal — usually 2+3 or 3+2+2. Count the groupings, not just the total.
Double-dotted notes
A single dot after a note adds half its value. A second dot adds half of that — so in total a double-dotted note is worth its original value plus three-quarters.
- Double-dotted crotchet = 1 + ½ + ¼ = 1¾ beats
- Double-dotted minim = 2 + 1 + ½ = 3½ beats
- Double-dotted quaver = ½ + ¼ + ⅛ = ⅞ of a beat
A double-dotted note is almost always followed by a note short enough to complete the beat — most commonly a semiquaver after a double-dotted crotchet. The effect is a very characteristically uneven, “snapping” rhythm, used a great deal in French Baroque music.
Irregular time signatures: 5/4, 7/4, 5/8, 7/8
Simple time divides into 2, 3 or 4 beats; compound time divides those beats into three. Irregular time uses a number of beats that cannot be reduced to a single duple or triple pattern: 5 and 7 are the most common.
5/4 has five crotchet beats per bar. It almost always feels like either 3+2 or 2+3 (never five equal beats). Dave Brubeck’s “Take Five” is in 5/4. 7/4 has seven crotchet beats, typically grouped as 3+2+2, 2+3+2 or 2+2+3. 5/8 and 7/8 work the same way with quaver beats.
Beaming in irregular time follows the group structure: in 5/4 as 3+2, beam quavers in a group of three then a group of two (or vice versa). The groups tell you where the subdivided pulse sits within the bar.
Irregular divisions of simple time
Triplets divide a beat into three in simple time. The same principle extends: any number of notes can be fitted into the space of another number, marked with a bracket and the relevant figure.
- Duplet (2 in the time of 3) — in compound time, already discussed.
- Quintuplet (5 in the time of 4 or 3) — five notes squeezed into one beat or two.
- Sextuplet (6 in the time of 4) — can also be read as two triplets.
The bracket and number tell you the substitution. The notes inside are played as evenly as possible within the stated duration. These are less common than triplets but appear in expressive solo writing where the performer needs a note-count that falls outside the standard subdivisions.
Beaming and note-grouping rules
Beaming (joining quavers and shorter notes with a horizontal bar) must reflect the beat structure of the time signature. The rule of thumb: each beat should be visually clear.
- In 4/4, do not beam across the half-bar boundary (beat 3). Quavers on beats 1–2 can beam together; quavers on beats 3–4 can beam together; but a beam must not link a note from beat 2 to a note on beat 3.
- In 3/4, you may beam across the bar freely because all three beats are of equal weight, but a single quaver is usually written with a flag rather than beamed to the next bar.
- In 6/8, beam in groups of three quavers (one dotted-crotchet beat per group). A beam of six quavers across the whole bar is acceptable; a beam of four quavers straddling the midpoint is not.
- In irregular time, beam within each sub-group (e.g. in 5/4 grouped as 3+2, three then two).
- Rests follow the same principle — use rests that fill complete beats or sub-groups, not rests that split a beat in two across a boundary.