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Home›Music theory

Rhythm and meter

How music is measured in time: the beat and tempo, note values and rests, dots and ties, simple meters like 3/4 and 4/4, compound meters like 6/8, and syncopation, triplets and pickups. Every unit has the rhythm lab with a tap-along test that scores each tap in milliseconds, and most units add a metronome for any time signature and note blocks you stack into bars.

Progress

About this course

The wind-up pendulum metronome became popular after 1815, when Johann Nepomuk Maelzel, an inventor and showman working in Vienna, patented it. The design was not really his. Dietrich Nikolaus Winkel in Amsterdam had built the key idea first in 1814, a double-weighted pendulum whose speed changes when you slide a weight along the rod, and Maelzel copied and sold it. The word joins the Greek metron, measure, and nomos, rule. Beethoven became the first well-known composer to write metronome marks into his scores, and old editions still print M.M., short for Maelzel's Metronome.

The six units start with beat and tempo: at 60 beats per minute a beat lasts exactly one second, and at 120 it lasts half a second. Note values and rests follow, and one whole note lasts as long as 2 half notes, 4 quarters, 8 eighths or 16 sixteenths. Dots and ties show that a dot adds half, so a dotted half note lasts 3 beats and a dotted quarter 1.5, as in the fourth bar of Ode to Joy. Simple meter covers 2/4, 3/4 and 4/4, a march in 2, a waltz in 3 and most pop songs in 4. Compound meter shows 6/8 as two beats of three, the rocking feel of Row, Row, Row Your Boat. The last unit puts the accent on the and, as in Scott Joplin's The Entertainer of 1902. Every unit has the rhythm lab, a tap-along test that scores each tap in milliseconds, and most add a metronome for any time signature and note blocks you stack into bars.

Before you start

Counting aloud helps here: the lessons compare a steady beat with the notes and rests that fit around it. Simple fractions also help when a beat is divided or a dot adds half a note value. The rhythm lab lets you test the timing of your taps as you work.

When you finish

You can count beats at a given tempo, fit notes and rests into a bar, and work out the lengths of dotted and tied notes. You can distinguish simple from compound meter, count 6/8 as two groups of three, and recognise syncopation, triplets and pickups while checking your timing in the tap test.

  1. 1Beat and tempoAt 60 beats per minute a beat lasts exactly one second; at 120 it lasts half a second, and the music feels twice as fast.
  2. 2Note values and restsOne whole note lasts as long as 2 half notes, 4 quarter notes, 8 eighth notes or 16 sixteenth notes.
  3. 3Dots and tiesA dot adds half: a dotted half note lasts 3 beats and a dotted quarter lasts 1.5, the long-short step in the fourth bar of Ode to Joy.
  4. 4Simple meter: 2/4, 3/4 and 4/4A march steps in 2, a waltz turns in 3 and most pop songs count in 4; in all three the beat splits into two equal halves.
  5. 5Compound meter: 6/8, 9/8 and 12/8Six eighth notes can be counted as three pairs or two triplets; 6/8 means two beats of three, the rocking feel of Row, Row, Row Your Boat.
  6. 6Syncopation, triplets and pickupsPut the accent on the "and" instead of the beat and the rhythm leans forward; the piano rags of Scott Joplin, such as The Entertainer of 1902, are built on it.

Related courses

  • Reading notes
    Learn to read pitches on the staff: treble clef, bass clef, ledger lines, the grand staff, sharps and flats, and the different names musicians use for the same notes. Every unit has a staff quiz or a keyboard you can play.
  • Scales and keys
    Build any major scale from one pattern of whole and half steps, name every scale degree, read a key signature at a glance, find your way around the circle of fifths, and tell a minor key from its relative major.
  • Intervals
    An interval is the distance between two notes. Count half steps on the keyboard, name thirds, fourths, fifths and octaves, hear why some intervals sound stable, and train your ear and voice with melodies everyone knows.
  • Chords
    Stack thirds to build triads, hear the difference between major, minor, diminished and augmented, name every chord in a key with Roman numerals, read inversions and seventh chords, and follow the progressions and cadences that end a musical phrase.
Sources for this course (10)
  • Open Music Theory, Gotham, Hamm, Hughes, Shaffer et al., chapters "Simple Meter and Time Signatures", "Compound Meter and Time Signatures", "Other Rhythmic Essentials" (viva.pressbooks.pub/openmusictheory, CC BY-SA; ideas only, no sentences copied): beat, simple meter divides in two, compound in three, compound beat is a dotted note, top numbers 2/3/4 and 6/9/12, beaming shows the beat, triplets and duplets as borrowed divisions, syncopation as off-beat accents made by ties, dots, rests or dynamics
  • Open Music Theory 1e "Meter and time signatures" (openmusictheory.github.io/meter.html): six standard meter types
  • musictheory.net lesson 15 "Simple and Compound Meter" (6/8 grouped in two dotted quarters is compound duple)
  • Wikipedia "Metronome" and "Maelzel's metronome" (Maelzel patent 1815, design based on Dietrich Nikolaus Winkel, word from Greek metron and nomos, Beethoven the first notable composer to give metronome marks)
  • Linda Hall Library, Scientist of the Day, Johann Nepomuk Maelzel (lindahall.org)
  • Wikipedia "Row, Row, Row Your Boat" (words printed 1852, modern tune with the words 1881, Eliphalet Oram Lyte, melody in 6/8)
  • Wikipedia "The Entertainer" (Scott Joplin rag, published 1902 by John Stark & Son, copyright registered 29 December 1902)
  • Melodies used are public domain: "Ah! vous dirai-je, maman" tune (Twinkle, 18th century)
  • Beethoven Symphony No. 9 finale theme (1824)
  • Row, Row, Row Your Boat (1881 tune).

Checked: 2026-10-18