A 3/4 online metronome is a browser-based click generator that places three evenly spaced beats inside each measure at a tempo you choose, and the Online Metronome produces exactly that with no install, account, or upload. You enter a whole tempo from 30 through 240 BPM, set beats per measure to 3, and click Start; the first beat of every bar plays at 1320 Hz while beats two and three play at 880 Hz, so the waltz "ONE-two-three" pattern is unmistakable. The interval between clicks is calculated as 60 divided by BPM seconds, so at 60 BPM you hear one click per second, and the same formula halves the gap each time the tempo doubles. The audio is generated locally by your browser's Web Audio API in the current tab; no microphone is requested and no audio leaves your device. Because beat one is pitched higher than the rest, the downbeat of every measure stays audible even when you are not looking at the screen.
What 3/4 Time Sounds Like and Why a Metronome Helps
In written music, 3/4 is a simple triple meter: each measure contains three quarter-note beats grouped as one strong beat followed by two weaker beats. That long-short-short pulse defines waltzes, minuets, mazurkas, and many folk dances, and it also shows up in pop songs, film scores, and classical themes. Most beginners either rush the second beat or land too heavily on beat three, which makes a waltz feel march-like or uneven. A steady click at the right tempo is the fastest way to fix that. The Online Metronome lets you isolate just the three beats of the bar, with no subdivisions, swing, or extra instruments, so your ear learns where the downbeat sits before any complexity is added.
Because the tool only plays three evenly spaced clicks per measure, it is also a clean reference for double-checking a piece you already know. If you can place every note of a melody exactly on beat one, two, or three, your internal pulse is solid; if you cannot, the metronome will expose the wobble immediately. This is why teachers reach for a metronome set to 3 rather than a full backing track when they want students to feel the waltz pattern rather than ride on top of one.
How to Set 3/4 Time on the Online Metronome
- Open the Online Metronome in a browser tab.
- In the tempo field, type a whole number from 30 to 240, such as 90 for a slow waltz or 174 for a fast Viennese waltz.
- Set beats per measure to 3 so every bar contains the "ONE-two-three" pattern of 3/4.
- Choose Start. Listen for the higher click on beat one and the two lower clicks that follow.
- Practice your piece, scale, or rhythm exercise against the steady pulse.
- Select Stop when you finish; the audio context closes and the next scheduled click is cancelled.
- Close the tab once playback is stopped so no audio state lingers.
The tempo and beats-per-measure fields accept untrimmed whole decimal numbers only. Values below 30 or above 240 BPM, or beats per measure outside 1 through 12, fail rather than being rounded or capped. Editing either value while playing automatically stops the metronome so the displayed tempo and the audible pulse never drift apart, and any old audio context is closed before a new one is created.
Choosing a Waltz Tempo That Fits the Piece
The right tempo depends on the character of the music. Slower settings in the broad range below 84 BPM give a stately, processional feel suited to bridal waltzes and slow practice; mid-range settings cover most standard waltzes and many teaching pieces; faster settings in the upper 160s and 170s drive the classic Viennese waltz, where one beat covers a wide swing of the body. Beginners usually start at the slower end to internalize the triple pulse, then move up once the downbeat is reliable. The Online Metronome's 30 to 240 BPM window covers every common waltz tempo without forcing a tool switch.
The same metronome can also leave 3/4 entirely. Because beats per measure accepts any value from 1 through 12, you can preview how the higher first click feels inside other meters, then return to 3 for waltz work.
| Beats per measure | Common meter | Typical feel |
|---|---|---|
| 1 | Pulse only | Single steady click, no group accent |
| 2 | 2/4 | March-like, two equal pulses |
| 3 | 3/4 (waltz) | Long-short-short, one strong beat per bar |
| 4 | 4/4 | Common time, strong-weak-medium-weak |
| 6 | 6/8 | Compound duple, lilting feel |
| 12 | 12/8 or 4/4 with triplets | Compound quadruple, rolling feel |
Reading the Accented First Beat
Because beat one plays at 1320 Hz and the other beats play at 880 Hz, you can identify the start of each 3/4 measure just by listening. The visual display also advances through the chosen measure length with a wrap-safe integer counter, so the beat number resets to one at the start of every bar. Together, the higher pitch and the reset counter are redundant cues, which is useful when your eyes are on the music stand, useful when you are counting in a choir, and useful when you are teaching a child the waltz pattern by ear. If you ever want a uniform pulse with no downbeat emphasis, set beats per measure to 1; the counter still wraps, and every click plays at the same 1320 Hz pitch.
That same accent logic is what makes the metronome work for 3/4 specifically. Without the higher first beat, a stream of identical clicks would not tell you where each waltz bar begins, and the long-short-short character of the dance would be harder to feel. With the accent in place, the "ONE" lands at the start of every group of three and the two weaker beats follow automatically.
Browser Timing and Known Limits
The clicks you hear are scheduled by your browser using the validated 60/BPM interval, so the pulse is steady for ordinary practice. Each click creates a short oscillator and a gain envelope; gain starts at a conservative 0.2 and decays exponentially to 0.001 over 50 milliseconds, and the oscillator stops after 60 milliseconds so old nodes do not accumulate. The display advances through the chosen measure length with a wrap-safe integer counter, and the browser schedules the next JavaScript callback from the calculated interval.
This is suitable for practice and tempo reference, but it is not a sample-accurate studio clock. Background tabs, power-saving modes, a busy main thread, Bluetooth audio latency, browser policies, and operating-system scheduling can each delay an audible click by a few milliseconds. At slow waltz tempos this drift is rarely noticeable, but near the top of the BPM range, small delays can shift where the click lands relative to your playing. If you need tighter timing for a recording session, treat the browser metronome as a practice reference and rely on a hardware metronome or a DAW clock for the final take. For scales, rhythm drills, sight-reading, and rough tempo checks, the browser version is more than adequate. If Web Audio is unavailable or startup is rejected, the tool shows an error and no stale playing state remains, so you always know whether the pulse is actually running.
Worked example for the interval formula: at 60 BPM the calculation is 60 ÷ 60 = 1.0 second, so the metronome produces one click per second. The same formula halves the gap each time the tempo doubles, which is why 120 BPM lands at 0.5 seconds and 240 BPM lands at 0.25 seconds.
Practice Ideas With a 3/4 Click
Once the metronome is set to three beats per measure, a few targeted drills quickly lock in the feel. Tap your foot only on beat one and ignore the other two for two bars, then add beats two and three to feel the triple motion. Play a single scale note on every click and notice where you naturally want to accent. Sing or hum the melody against the click without playing, then bring your instrument back in to check that the downbeat lines up. If you are working on accompaniment, lay down the bass note on beat one and the two chord tones on beats two and three; the higher first click tells you instantly when the bass should land. For sight-reading, slow the tempo down until the triple pulse is comfortable, then raise it gradually as the rhythm becomes automatic.
Volume matters more than tempo in early practice. Start with your device volume low, especially with headphones, so the click supports your playing rather than masking it. Real loudness depends on your speakers, headphones, browser gain, and the room you are in, so adjust in small steps rather than jumping levels. The metronome is a practice aid, not hearing protection, a calibrated sound source, or a guarantee that a displayed BPM will stay sample-accurate under every browser condition.
For a broader look at browser-based metronome habits and what to do when the pulse does not feel quite right, see the guide to using an online metronome in your browser.