Sound
Rhythm, Beat and Tempo
Rhythm is how music is organised in time: a steady beat, a speed to count it at, notes of different lengths laid over it, and bars that group the beats so the music has a shape you can follow.
Beginner · 5 sections
Pulse and Beat
Play these two. Both are the same short sound repeated eight times, and both fill the same stretch of time. You could tap your foot along with one of them without thinking about it, and you could not do that with the other. Say which is which, and what the difference actually is, before you read on.
4 beats
A beat is the steady, evenly spaced pulse that runs underneath a piece of music — the unit of time listeners tap, clap, nod or march along with, and the unit every other duration in the music is measured against. (also called pulse, used interchangeably, though "pulse" leans towards the sensation and "beat" towards the unit being counted)
The first clip has one. Eight taps, each the same distance from the last, and within two or three of them your body has already worked out where the next one will fall. That prediction is the whole phenomenon: a beat is something you can anticipate, and anticipating it is what lets a room full of strangers clap together. Every clip in this chapter is built from taps like these — a click on for an ordinary pulse and a click on for a stressed one, so that the grouping stays audible however quietly you are listening.
The second clip has exactly the same number of sounds in exactly the same amount of time, and no beat at all. Nothing in it lets you guess where the next tap will land, so there is nothing to tap along to. Sounds alone are not rhythm; regularity is what turns them into it.
What you tapped is also not necessarily what you heard. Put on almost any recording and the pulse you nod to is often sounded by nothing in particular — the singer is between beats, the guitar is holding a chord across them — and you keep nodding anyway. The beat is something a listener supplies, prompted by the music but not identical to it.
Fact
The beat is felt, not necessarily played. A listener keeps counting through a bar where no instrument marks the pulse at all — which is why a drummer can drop out for four beats without anyone losing their place, and why the missing beats in a stop-time break are still heard as beats.
Fact
Regularity, not loudness or pitch, is what makes a sequence of sounds tappable. The two clips above use the same note, the same number of taps and the same total length; only the spacing differs, and only one of them can be followed.
You already know this
In real music
- We Will Rock You, Queen — the stomp-stomp-clap is pulse and nothing else, and it carries the whole song — no pitched instrument joins it until the guitar arrives at the very end; count along from the first stomp and you are already exactly with the crowd
- Take Five, The Dave Brubeck Quartet — the piano vamp states the pulse plainly before the saxophone enters; then keep tapping through the long drum solo in the middle, where the piano drops out and the pulse is yours to supply rather than anyone's to play
Put on a recording you know well and tap the pulse on your knee until the end of the first verse. Then play a single note on your own instrument in time with those taps, one note per tap, and keep going after the recording stops.
Check 1
One clip, in two halves with a gap between them. Only one half keeps a steady pulse. Which one?
Tempo
Play these two. The sound is identical, the spacing is even in both, and each has the same eight taps as the other. Exactly one thing is different. Name it in your own words first, then say which of the two you would find easier to march to.
4 beats
| Italian marking | Roughly | In beats per minute | What it feels like | |
|---|---|---|---|---|
| Largo | Broad | 40–60 | Slow enough that you can lose the pulse between taps | |
| Adagio | At ease | 66–76 | A slow walk; ballads and funeral marches | |
| Andante | Walking | 76–108 | Ordinary walking pace, and the speed most people tap unprompted | |
| Moderato | Moderate | 108–120 | Brisk but unhurried | |
| Allegro | Cheerful | 120–168 | Most pop, rock and dance music lives here | |
| Presto | Quick | 168–200 | Faster than you can comfortably tap a foot |
Tempo is the speed of the beat — how many beats go by in a minute, written as a number of beats per minute and abbreviated bpm.
The two clips above are 60 bpm and 120 bpm. At 60 bpm a beat lasts exactly one second, which is why a clock is the standard way to find that tempo without a metronome; at 120 bpm it lasts half a second. The arithmetic never varies: divide 60 by the bpm and you have the length of one beat in seconds.
Tempo changes nothing about which sounds happen or in what order. Both clips above have the same eight taps in the same relationship to one another; only the clock ran differently. That independence is worth holding on to, because it is what lets the same piece be played fast or slow and still be the same piece.
Before metronomes were common, tempo was given in words rather than numbers, and those words are still printed at the top of most classical scores. They describe a character as much as a speed — "andante" is walking, "allegro" is cheerful — which is why the ranges in the table above overlap and why two conductors can disagree about the same marking without either being wrong.
Fact
One beat lasts 60 / bpm seconds. At 120 bpm that is half a second, at 60 bpm one second, at 40 bpm a second and a half. The relationship is exact and holds for any tempo.
Convention
Tempo words are Italian by tradition, because Italian musicians dominated European printed music when the practice settled in the seventeenth century. The words are used in scores worldwide, by composers who speak no Italian, and their bpm ranges are approximations agreed after the fact rather than definitions.
Tendency
Recorded songs cluster between about 90 and 140 bpm, with dance floors concentrating harder still around 120–128.
Applies to: Western popular music since the 1960s; art music, and most traditions outside this one, spread far more widely.
You already know this
In real music
- Stayin' Alive, Bee Gees — about 104 bpm, and taught in first-aid classes for exactly that reason — the hi-hat on the intro gives you the tempo before anything else enters
- Symphony No. 9, second movement, Ludwig van Beethoven — marked Molto vivace, and Beethoven left a metronome mark for it that most orchestras still play under; compare two recordings of the opening bars and the difference in tempo is obvious within five seconds
Play one note on your own instrument once a second, using a clock or a phone stopwatch to check yourself — that is 60 bpm. Then play two notes a second without changing anything else. Keep each one going for at least thirty seconds.
Check 1
A piece is marked 120 bpm. Before you play anything, work out how long a single beat lasts.
Note Values
Play these three in order. Each fills exactly the same stretch of time, and each has more sounds in it than the last. Count the sounds in each one, and notice how long each sound is left ringing before the next one arrives as their number goes up.
4 beats, each divided in 4
| Name | Fraction of a whole note | Beats in 4/4 | British name | |
|---|---|---|---|---|
| 𝅝 Whole note | 1 | 4 | Semibreve | |
| 𝅗𝅥 Half note | 1/2 | 2 | Minim | |
| 𝅘𝅥 Quarter note | 1/4 | 1 | Crotchet | |
| 𝅘𝅥𝅮 Eighth note | 1/8 | 1/2 | Quaver | |
| 𝅘𝅥𝅯 Sixteenth note | 1/16 | 1/4 | Semiquaver |
A note value is how long a note lasts, expressed as a fraction of a whole note rather than in seconds — so a half note is half the length of a whole note, a quarter note is half of that, and each further value halves the one above it. (also called semibreve, minim, crotchet, quaver and semiquaver, British usage, one name per row of the table above, in that order)
The three clips are one whole note, four quarter notes and eight eighth notes, in that order, and each sound is left ringing until the next one begins — so the first clip is a single note lasting all four beats, and the third is eight notes of half a beat each. They take the same time because the arithmetic makes them: four quarters are a whole, and eight eighths are a whole, so each clip is one full turn round the same grid with the same stretch of time divided differently.
Nothing here says how long any of it takes in seconds. A quarter note is one beat in 4/4, and a beat is 60 / bpm seconds, so the same quarter note is half a second at 120 bpm and one second at 60. Note values are proportions; tempo is what converts them into time.
Silence is measured the same way. A rest has a value exactly as a note does — a quarter rest is one beat of nothing in 4/4 — and it is part of the rhythm rather than a gap in it. None of the three clips contains one: their unstruck cells are the sound before them still ringing, which is what makes the first clip a whole note rather than one sound and four beats of silence. The uneven clips in the first section of this chapter are the opposite case, and their empty cells really are silence.
Fact
Each value is exactly half the one above it, so two of any value make one of the next: two eighths make a quarter, two quarters make a half, two halves make a whole. Sixteen sixteenths fill a whole note, which is why the grid above has sixteen cells.
Convention
The American names are fractions of a whole note and the British names are a separate vocabulary inherited from mensural notation. They describe identical durations: a crotchet and a quarter note are the same thing, and no piece of music sounds different for being written in one system or the other.
Convention
A quarter note equals one beat only in the meters whose lower number is 4 — 2/4, 3/4 and 4/4 among them. In 6/8 the beat is a dotted quarter and the counting unit printed on the page is the eighth, which is the subject of the last section of this chapter.
You already know this
Where this goes
In real music
- Every Breath You Take, The Police — the guitar figure is a steady run of eighth notes from the first bar and barely stops; count two to every tap of your foot and it lines up exactly
- Eine kleine Nachtmusik, Wolfgang Amadeus Mozart — the opening phrase moves through three values in eight bars — long held notes, then quarters, then a rush of eighths in the answering figure at about fifteen seconds
Pick one note on your own instrument and play four bars of it four ways without changing your counting speed: once held for four counts, then one note per count, then two per count, then four per count. Count out loud the whole time.
Check 1
Listen to this clip and count how many sounds fall on each tap of your foot.
Bars and Downbeats
Play these two. Neither changes speed and every tap is the same distance from the last, but some taps are higher than the rest. The higher ones do not arrive at the same rate in the two clips. Count how many taps go by from one high one to the next, in each.
4 beats, each divided in 2
| Beats in the bar | Counted | Where the stress falls | Usually called | |
|---|---|---|---|---|
| 2 | ONE two, ONE two | Every second beat | March time | |
| 3 | ONE two three, ONE two three | Every third beat | Waltz time | |
| 4 | ONE two three four | Every fourth beat, with a lesser stress on three | Common time |
A bar is one group of beats — most often two, three or four of them — repeated over and over so that the music is divided into equal units of time, each beginning with the strongest beat of the group. (also called measure, American usage; the two words mean the same thing and are used interchangeably)
That first beat has its own name: the downbeat. It is where a conductor's hand falls, where a bass player most often lands, and where you would clap if someone asked you to clap once per group. In the two clips above it is the higher tap, and counting from one higher tap to the next is counting the length of a bar.
Grouping is heard, not merely marked. The first clip gives four beats to a bar and the second gives three, and nothing about them differs except which taps are stressed — same speed, same spacing, same number of sounds a minute. Stress alone is enough to make a listener count in fours or in threes.
The stress can be supplied by anything: a louder drum, a lower bass note, a chord change, a syllable of the lyric, or nothing at all beyond the listener's own expectation. In this chapter it is supplied by a higher pitch rather than by a louder tap, which is a choice about clarity: a change of pitch survives a bad speaker, a noisy room and a low volume setting, and a change of loudness does not. Chapter 18 takes loudness itself as its subject and does vary it.
Convention
Every bar in a piece holds the same number of beats unless the notation says otherwise, which is what makes bars usable as a unit of measurement: "eight bars" is a definite length of time once the tempo is known. Composers change the grouping freely by writing a new time signature mid-piece, and some music does so every few bars.
Convention
Bars are drawn on a staff as vertical lines cutting across it, and the lines are placed before the downbeat rather than after it — so a bar runs from one line to the next, beginning on the stressed beat.
Tendency
Four beats to a bar is overwhelmingly the most common grouping, to the point that a listener assumes it unless something contradicts it. Three is the next most common and is heard as a waltz; two is heard as a march.
Applies to: Western popular and classical music. Many traditions — Balkan dance, much of North India, a good deal of twentieth-century art music — group beats in fives, sevens and nines as a matter of course.
You already know this
Where this goes
In real music
- The Blue Danube, Johann Strauss II — three beats to a bar throughout; once the main tune arrives, the accompaniment gives you a low note on every downbeat and two light chords after it, which is the grouping made audible
- Billie Jean, Michael Jackson — the drum pattern that opens it states four beats to a bar entirely on its own before the bass line joins; the kick drum marks every downbeat and the snare answers on beats two and four, and that pairing runs unchanged through the whole song
Play one note on your own instrument repeatedly at a steady speed, and give every third one extra weight — more bow, more breath, a harder pick stroke. Then keep everything the same and give every fourth one the weight instead. Nothing changes but the stress.
Check 1
Listen to this clip and count how many beats go by from one higher tap to the next, counting the higher tap itself as one.
Simple and Compound Meter
Play these two. Each has twelve evenly spaced taps and each takes the same time from beginning to end. The only difference is which of the taps are higher. One of them leans in twos and the other leans in threes — decide which is which, and say what that does to the feel, before you read on.
2 beats, each divided in 3
| Time signature | Beats in a bar | Each beat divides into | Where to hear it | |
|---|---|---|---|---|
| 2/4 | Two quarter notes | Two — simple | "The Stars and Stripes Forever", Sousa — the march step itself | |
| 3/4 | Three quarter notes | Two — simple | "The Blue Danube", Strauss — the waltz accompaniment | |
| 4/4 (𝄴) | Four quarter notes | Two — simple | "Billie Jean", Michael Jackson — the opening drum pattern | |
| 6/8 | Two dotted quarter notes | Three — compound | "We Are the Champions", Queen — the piano figure under the first verse |
A meter is simple when each of its beats divides into two equal parts, and compound when each of its beats divides into three — so the difference between the two is not how many beats a bar holds but what happens inside each beat.
Both clips above have twelve taps at the same speed, so the same amount of time passes in each. In the first, a higher tap comes every two, which makes six beats of two parts each: simple. In the second, a higher tap comes every three, which makes four beats of three parts each: compound. Nothing moved except the stress, and the feel changed completely.
2/4, 3/4 and 4/4 are the everyday simple meters: two, three or four quarter-note beats, each splitting into two eighths. 6/8 is the everyday compound one, and it is easy to misread, because the six in it counts eighth notes rather than beats. A bar of 6/8 has two beats, each a dotted quarter, each dividing into three.
That is why 3/4 and 6/8 are not the same thing despite both holding six eighth notes in a bar. In 3/4 the stress falls on the first, third and fifth of those eighths; in 6/8 it falls on the first and the fourth. Play the two clips above one after the other and the difference needs no explaining.
Fact
A bar of 3/4 and a bar of 6/8 contain the same total duration — six eighth notes — and differ only in how those eighths are grouped: three groups of two against two groups of three.
Convention
In a compound time signature the lower number names the subdivision rather than the beat, so the top number is three times the number of beats: 6/8 has two beats, 9/8 has three, 12/8 has four. This is a quirk of the notation, not of the music.
Tendency
Simple meter, and 4/4 above all, accounts for the large majority of recorded songs; compound meter turns up most often in ballads, blues shuffles, jigs and doo-wop, where the three-part division is what gives the swaying quality.
Applies to: Western popular music. In Irish and Scottish dance music the jig — a compound meter — is one of the central forms, and many West African traditions treat two-part and three-part divisions as equally ordinary and often sound both at once.
You already know this
Where this goes
In real music
- We Are the Champions, Queen — the piano under the first verse divides every beat into three; count "one-and-a, two-and-a" from the opening chord and it fits exactly, where counting in twos does not
- Norwegian Wood, The Beatles — the guitar and sitar figure at the start lilts in threes throughout; compare it directly with the straight twos of "Eight Days a Week" and the two divisions are easy to tell apart
Set a steady pulse on your own instrument and play three even notes inside every beat for a minute without the pulse drifting. Then play two even notes inside every beat at the same pulse. Switch between the two every four beats.
Check 1
Before you play anything: from the table above, which of these four meters divides each of its beats into three equal parts? Then press play to check yourself.
Key Takeaways
- A beat is the steady pulse a listener taps along with, and it is felt whether or not any instrument actually plays it.
- Tempo is the speed of that pulse in beats per minute, and one beat always lasts 60 divided by the bpm in seconds.
- Note values are proportions rather than durations: each is half the one above it, and only a tempo turns them into seconds.
- A bar is a repeating group of beats whose first beat, the downbeat, carries the strongest stress, and stress alone is enough to create the grouping.
- A meter is simple when its beats divide into two and compound when they divide into three, which is why 3/4 and 6/8 hold the same six eighth notes and still sound nothing alike.
Last updated September 22, 2026
Questions
- What is the difference between beat and rhythm?
- The beat is the steady pulse underneath the music, evenly spaced and unchanging. Rhythm is the pattern of long and short sounds laid over that pulse. Tap your foot and you are giving the beat; sing the words and you are giving the rhythm. One is the grid, the other is the picture drawn on it.
- What does bpm mean?
- Bpm stands for beats per minute, and it is how tempo is measured: 60 bpm is one beat every second, 120 bpm is two beats every second. Divide 60 by the bpm and you have the length of one beat in seconds, which is why 120 bpm gives half a second.
- What is a bar in music?
- A bar, called a measure in American usage, is one group of beats — usually two, three or four — marked off so that the music has a repeating unit. The first beat of every bar is the downbeat and carries the strongest natural stress, which is what makes the grouping audible.
- What is the difference between 3/4 and 6/8?
- Both hold six eighth notes in a bar, so the difference is not how much time passes but where the stress falls. In 3/4 there are three beats, each splitting in two, stressed one-three-five. In 6/8 there are two beats, each splitting in three, stressed one-four.
- How do I find the beat in a song?
- Put a recording on and let yourself nod or tap without thinking about it; most listeners land on the beat within a few seconds. Then check the spacing: if your taps are evenly apart and you can keep them going through the whole song, you have found it.