Free Online Metronome

How to Use a Metronome

Set the tempo, pick a time signature, and press start. The first beat of each bar is accented so you always know where the bar begins. That is the whole interface: the difficulty is never operating it, it is what you do with it.

Most musicians treat a metronome as a test that judges whether they are playing in time, which turns practice into pass/fail and makes people quit the moment it gets uncomfortable. It is more useful to treat it as a reference you play with. The click is not grading you; it is showing you where the beat is so you can hear your own relationship to it.

Tempo Markings and BPM

Tempo is measured in beats per minute. Written music often names a tempo instead of numbering it, and those Italian markings map onto BPM ranges; the boundaries vary between editions, but this is the range this metronome uses:

If you do not know a song's tempo, use Tap Tempo: tap along with the track and the metronome averages your taps into a BPM.

Time Signatures

The top number is how many beats are in a bar; the bottom is which note value gets the beat. In 4/4, four quarter notes, the default for most popular music. 3/4 gives three, the waltz feel. 2/4 is a march. 5/4 is an odd meter you will recognize from Take Five. 6/8 counts six eighth notes, usually felt as two groups of three, which is why it lilts rather than marches. 7/8 counts seven eighth notes, most often felt as 2+2+3. The click accents the first of the seven and leaves the grouping to you, which is the more useful way round: the grouping changes from tune to tune, and a metronome that insists on one of them fights the music.

The accent on beat one is what makes a time signature audible. Without it, 3/4 and 4/4 are just undifferentiated clicks.

Subdivisions, Swing and Offbeat Accents

Playing to quarter notes tells you where the beats are. Subdividing tells you where you are between them, which is where timing problems actually live. Eighth notes catch rushing on offbeats; triplets expose an uneven shuffle; sixteenths are how you tighten fast picking or drum fills.

Swing moves the offbeat eighth from halfway through the beat to the last note of a triplet. That is the shuffle feel behind most jazz, blues and a great deal of hip-hop. Hearing it against a straight click is the fastest way to internalize the difference.

The offbeat accent flips where the weight sits. Normally the click stresses the beat and the subdivisions fill in quietly around it. Switch it on and the stress moves to every "and", with the beats themselves stepping back. That is the feel behind a backbeat, a reggae skank and most funk guitar: the pulse has not moved, but the emphasis has.

Playing against it is harder than it sounds, because the ear wants to treat the loudest thing it hears as beat one. So the downbeat keeps its accent but drops to a low tone, leaving three distinct levels: a low thud on the one, quiet mid clicks on the other beats, and a bright accent on every "and". You can feel the bar turn over underneath without the one competing for attention. It needs eighth or sixteenth subdivision, since a triplet has no "and" to move the accent to.

Practicing with the Speed Trainer

The reliable way to get faster is to play something cleanly and repeatedly at a manageable tempo, then raise it in increments small enough that your hands barely notice. The speed trainer automates that: set how many bars to hold and how much to add, and it steps the tempo at the bar line until it reaches your ceiling.

Small steps beat large ones. Five BPM every two bars is aggressive for difficult material; two or three BPM every four bars is often better. If accuracy drops, you have found your real ceiling. Stop there and come back tomorrow.

Polyrhythms

A polyrhythm is two or more pulse trains running over the same span of time: 3 against 4 means three evenly spaced clicks and four evenly spaced clicks sharing one cycle, coinciding only at the start. Hearing that alignment is difficult until you have heard it slowly and often, which is exactly what the polyrhythm mode is for. Each voice gets its own pitch and color, so you can lock onto any one of them and let the rest become texture.

You can run up to four voices at once, which puts 3:4:5 and 2:3:7 within reach as easily as the textbook 3:2. The first voice is the reference: its clicks land on the tempo you set, and every other voice fits its own count into that same cycle. Adding a voice changes the texture without changing the tempo, so the cycle stays exactly as long as it was.

Start with two. 3:2 is the one worth owning first, because it is the skeleton inside a great deal of West African and Latin music, and because most other ratios feel approachable once your hands can hold it. Count the cycle out loud in the reference voice and let the other land where it lands, rather than trying to place both at once.

Practicing Without the Click

A metronome is a crutch as much as it is a tool. Playing along with one constantly proves you can follow a click, which is a different skill from keeping time, and the gap between the two only shows up once the click stops. The way to find out where you stand is to take it away.

The bar pause does that on a loop. It plays for a set number of bars, drops out for a set number, then comes back in on the downbeat. If you drifted, you hear it the moment the click returns, sitting early or late against where you have got to. Four bars on and four off is a fair starting point. Two and two is harder than it looks, and eight and eight is a genuine test.

The beat dots keep running through the silence, so there is a visual reference if you want one. Look away from them if you would rather work by feel alone.

Why Browser Timing Is Accurate Here

A naive browser metronome uses setInterval, which drifts because JavaScript timers are not guaranteed to fire on time. This one schedules clicks on the Web Audio clock instead: a timer wakes roughly every 25 milliseconds and queues any clicks falling in the next 100 milliseconds, with their exact start times handed to the audio hardware in advance. Playback timing is therefore sample-accurate and does not depend on when the timer happened to fire.

The visual beat indicator is driven from those same scheduled times, so the dots stay locked to what you hear rather than being animated separately.

Frequently Asked Questions