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05
Rhythm · Bars & Time Signatures
7 min
← Course Unit 1 · Rhythm

Bars & Time Signatures

What is a bar in music? Hear how beats group into bars, why beat 1 carries the accent, and how 4/4 marches while 3/4 waltzes.

Beats never wander around loose — music packs them into bars. Press play and count out loud: ONE two three four, ONE two three four.

HAT
SNARE
KICK
1 · · · 2 · · · 3 · · · 4 · · ·
BPM 100

Bars group beats

A bar (or measure) is a small parcel of beats that repeats. This grid holds exactly one bar of 4/4: four beats, and the orange marks show where each beat lands. The kick is playing right on those beats.

Beat 1 is home

The first beat of every bar carries a natural accent — the ONE. It is where the loop restarts and where the music feels like it lands. When you count along, everything resets at the ONE.

4/4 vs 3/4

4/4 means four beats per bar — the default for pop, rock, and marching. 3/4 means three beats per bar — the waltz. The grid below has only 12 columns: three beats of four sixteenths each. Press play and count ONE two three, ONE two three.

HAT
SNARE
KICK
1 · · · 2 · · · 3 · · ·
BPM 100

4/4 walks steadily, like footsteps: LEFT right left right. 3/4 spins, like a dance turning in circles. Now count some bars by ear.

Challenge
1/3

Count along with this loop. How many beats are in each bar?

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Playnota PN-31
Music theory you can play
Serial PN-31-EN-31 Made for people who want to play.