An introduction to rhythm: Beats, measures, and note values

intro-rhythm-featured-image

Illustration: Laura Bee

Rhythm is perhaps the most fundamental element of music.

Rhythms tell us the timing for where to place notes and rests in music. While entirely rhythm-driven music exists (ex. music created by hand claps), you can’t really have music that’s ‘solely melodic’ – after all, how can we have a melody if we have no information about when its notes are going to strike? For this reason, it makes sense to learn about rhythm at the start of one’s musical journey.

What’s a beat?

While we casually use the word ‘beat’ to refer to all sorts of things we hear, in the context of music theory a beat is a passage of music’s steady, primary pulse. If you’ve ever tapped your foot or clapped along to a song, you’ve probably done so in sync with the song’s beat.

If you’re not confident in your beat-keeping abilities, let’s use Avicii’s “Wake Me Up” as a simple exercise – try tapping your foot along to the song:

If you found your foot landing in sync with the thumping kick drum that entered at the chorus (0:39), congratulations – you successfully identified the beat! You may also notice the clap sounds, which occur in between each of the kicks. Combined with the kick, these outline a pulse that’s twice as fast; this secondary pulse is referred to as the beat division.

What are meters?

Now that we have a basic understanding of beats, let’s talk about how they’re organized. Musical meters help us communicate how our beats are grouped and divided. There are two primary types of musical meters: simple meters, which have beats that can be naturally divided into groups of two, and compound meters, which have beats that can be naturally divided into groups of three. Today, let’s focus on two common simple meter types that, together, cover a pretty large quantity of music.

1. Simple quadruple meter

If you try counting numbers aloud to the beat of “Wake Me Up,” you’ll find that repeating the phrase “one-two-three-four” makes the most sense – you might even find yourself naturally gravitating towards it. Furthermore, as we heard with the claps, the beats are divided into even groups of two (we can best include the claps in our counting by inserting an “and” in between each kick – e.g. “one-and-two-and-three-and-four-and“). When the beats are organized in fours (one | two | three | four) and each beat can be divided into groups of two (one-and | two-and | three-and | four-and) in this way, we say that the specific meter type is simple quadruple.

2. Simple triple meter

While we’ll find ourselves counting to four for most popular music, there are also many songs that don’t fall under this umbrella. Take Billie Eilish’s “when the party’s over,” for example:

Notice how it feels more natural to count “one-two-three” with each phrase, as opposed to “one-two-three-four.” The division of each beat isn’t clear until Billie sings “Quiet when I’m coming home” (0:53), a phrase that delivers two evenly-spaced syllables per beat (you can easily replace the syllables in the line with “one-and-two-and-three-and-one”) – this confirms that the specific meter type is simple triple.

Simple triple meter can at times be confused with compound meters, because there can be a gray area where we’re unsure of whether we’re tapping along to a beat or its subdivision. In these instances, we make a determination based on which specific beats are emphasized by the music. If that went over your head, don’t worry; we’ll explore this idea in further detail another time.

Your turn: Listen to the following songs, and determine whether they’re in simple quadruple or simple triple meter:

1. The Beatles’ “Here Comes The Sun”
2. Kelly Clarkson’s “Breakaway”
3. Bruno Mars’ “That’s What I Like”

Think you got it? See the answers below.

1. Simple quadruple meter

2. Simple triple meter

3. Simple quadruple meter

 

Notating simple time signatures

Now that we have a basic understanding of simple meters, let’s figure out how to communicate them in writing. Almost always, a piece of music will use a time signature that looks something like this:

Common time (4/4) displayed on a staff

How a time signature appears in sheet music

Common time (4/4) displayed in a DAW

How a time signature appears in a DAW (Studio One)

Time signatures are expressed with two numbers that are presented like a fraction. With simple meters, each number conveys the following piece of information:

  • The top value (the ‘numerator’) tells us whether the meter type is duple (2), triple (3), or quadruple (4). In other words, it tells us how many beats exist in each measure, a unit that helps us section our music into logical and digestible pieces (also known as a bar). We’ll explore measures / bars in further detail in a bit.
  • The bottom value (the ‘denominator’) tells us if a beat is constituted by a half note (2), quarter note (4), eighth note (8), or sixteenth note (16).

Let’s walk through an example – in the above images, we see a time signature of 4/4. This means that our music is in quadruple meter (i.e. has four beats per measure), and that a quarter note is equivalent to one beat.

A chart that shows the beats per measure and 'beat unit' for different common simple meters

This raises the question: what’s a quarter note?

Understanding rhythmic values

In order to create a rhythm that’s more than just a steady beat, we need to be able to have notes and rests (silences) that are of different durations. In sheet music, we use unique symbols to tell us how long notes or rests last in relation to one another – see what they look like in the chart below.

Rhythmic values in sheet music

A chart that breaks down what each symbol in music notation means in relation to rhythm

Note that one whole note, two half notes, four quarter notes, eight eighth notes, and sixteen sixteenth notes are all equivalent to one another in their total duration.

A chart that shows equivalent values, breaking down a whole note into two half notes, four quarter notes, eight eighth notes, and sixteen sixteenth notes
A chart that shows equivalent values, breaking down a whole rest into two half rests, four quarter rests, eight eighth rests, and sixteen sixteenth rests

Rhythmic values in the DAW

When we’re working in the DAW, we’ll most likely be using a piano roll, where MIDI notes (pictured below) are sequenced across a grid. Here, different rhythmic values won’t have different symbols; rather, we’ll be looking at the length of the MIDI note in relation to the grid to determine its rhythmic value.

The length of different notes, demonstrated on the piano roll

Consequently, any blank space where a note doesn’t exist is considered a rest.

The length of different rests, demonstrated on the piano roll

Rhythm in action

Enough talk – now that we’ve learned about some different note values, let’s hear how they sound in action. The same musical excerpt is displayed in both sheet music and on a piano roll below:

Sheet music

The vertical lines, known as bar lines, denote where one measure ends and the next one begins. Measures are typically numbered so that we can easily reference specific moments in the music.

MIDI (piano roll)

Piano rolls not only have bar lines, but many other vertical lines that give us insight into the specific beat number and subdivisions.

In the example above, the metronome (the consistent clicking sound) is striking on each beat – if we follow it, we can hear that the whole note (measure one), four quarter notes (measure two), eight eighth notes (measure three), and sixteen quarter notes (measure four) all last for the same duration: one measure, or four beats.

Creating a basic rhythm

Now that we’re familiar with some common rhythmic values, we can arrange and combine them to create some more interesting rhythms.

Here’s an example:

Sheet music

MIDI (piano roll)

Notice how all of the notes in each measure still add up to four beats; the first measure contains a half note (two beats) followed by two quarter notes (one beat each), the second measure contains an alternation between two quarter notes (one beat each) and two pairs of eighth notes (one beat each), etc.

Reading dotted values

While you can do a lot with the rhythms we’ve covered so far, you may have noticed that they’re somewhat restrictive. For instance, what if you wanted a note to last for one and a half beats? Dots can help us achieve the nuance we’re looking for.

A dotted quarter note on a staff

A dotted quarter note

A little bit of math gets involved here, but a dot essentially extends a note’s duration by half of its value. For example, a dotted quarter note is equivalent to a quarter note plus an eighth note, and a dotted half note is equivalent to a half note plus a quarter note.

Let’s hear how some commonly-used dotted notes sound in practice:

Sheet music

MIDI (piano roll)

What’s tempo?

Last but not least, one important element of rhythm that we haven’t addressed yet is tempo, or the overall speed. In a DAW, we define the tempo by setting a BPM, an acronym that stands for “beats per minute.” Most projects are set to 120 BPM by default.

Here’s what a simple drum groove played at 120 BPM sounds like:

The speed at which a rhythm is played can totally transform its character. For example, here’s the same exact groove played at 90 BPM:

And here it is one more time, played at double the speed, 180 BPM:

Stylistic factors can contribute to how fast or slow you want to set your tempo. For example, if you’re creating an energy-packed drum & bass track, a tempo somewhere between 160 – 180 BPM might be a good starting point. On the other hand, if you’re looking to create a gentle waltz piece, you might set your tempo closer to 90 BPM.

In sheet music, tempi (the plural for tempo) are often a little more approximate. Though sometimes a specific BPM is notated, more often than not you’ll just see one of the following phrases at the top of the sheet that indicates the rough speed at which the piece is intended to be performed:

  • Slow tempi: largo, grave, adaigo, etc.
  • Medium tempi: moderato, andante, andantino, etc.
  • Fast tempi: vivace, allegro, presto, etc.

Putting it together

Let’s wrap things up by putting together everything we’ve learned. In the following rhythm, we combine regular notes, rests, and dotted values under a time signature of 4/4 and a tempo of 120 BPM.

Sheet music

MID (piano roll)

This is, without a doubt, a lot to take in (we’re speeding through what traditional music courses might spend days or weeks on). Definitely take the above example one beat at a time, and refer to the different sections of this article to understand why each part in the passage is expressed in the way that it is.

Wrapping up

Once you feel pretty good, give yourself a pat on the back! While this is just an introduction to the expansive world of rhythm, you should now be well equipped to begin reading and creating rhythms (even if you’re not 100% confident, know that applying these concepts in the DAW firsthand will also be super helpful in reinforcing the material; as they say, you can’t learn how to ride a bike by just reading about it). In a separate post, we’ll specifically focus on using these abstract concepts to compose a drum groove in the DAW.


If you’re reading this article as part of your journey towards creating your first track, go back to the curriculum that corresponds with your DAW and proceed to the next step:

October 20, 2020

Harrison Shimazu Harrison Shimazu is the editor of the Splice blog and a composer for video games and film.