Online Metronome & Tap Tempo BPM Finder (Accurate Audio Clock)
Free online Metronome and Tap Tempo BPM counter for musicians, guitarists, pianists, and drummers. Built with the Web Audio API for drift-free, sample-accurate timing. Features adjustable tempos from 20 to 300 BPM with Italian tempo markings (Largo, Andante, Moderato, Allegro, Presto), time signatures (2/4, 3/4, 4/4, 6/4), multiple click sound packs (Acoustic Woodblock, Digital Synth, Snappy Click), visual pulsing beat indicators, and an interactive Tap Tempo calculator.
Online Metronome & Tap Tempo BPM Finder
Accurate, zero-lag browser metronome with custom time signatures, sound samples, and tap tempo detector for musicians, drummers, and guitarists.
Tap to calculate BPM
Step-by-Step Instructions
Set Beats Per Minute (BPM)
Use the tempo slider, plus/minus buttons, or tap the Tap Tempo button in rhythm to set your desired speed (20 to 300 BPM).
Select Time Signature & Subdivision
Choose your meter (2/4, 3/4, 4/4, 6/8, 5/4) and note subdivisions (quarter notes, eighth notes, triplets, sixteenth notes).
Configure Click Tones & Accent Beats
Select tone sounds (woodblock, digital beep, drum rimshot, cowbell) and toggle high-pitch accents on the downbeat.
Start Rhythmic Practice
Press Play or Spacebar to follow the audio click with visual beat counter and pendulum animations.
Key Features & Capabilities
- Ultra-precise Web Audio API lookahead scheduling algorithm eliminating JavaScript timing drift and jitter
- Tempo range from 20 BPM (Grave/Largo) to 300 BPM (Prestissimo) with traditional Italian tempo markings
- Interactive Tap Tempo engine calculating running average BPM over 4 consecutive manual taps
- Comprehensive time signatures: 2/4, 3/4, 4/4, 5/4, 6/8, 7/8, 9/8, and 12/8 with customizable subdivision clicks
- Distinct accent downbeats and multiple sound synthesizers (classic woodblock, quartz beep, cowbell, rimshot)
- Visual pulsating beat indicator and animated pendulum for silent visual practice
Frequently Asked Questions
Why do standard JavaScript timers drift and how does this metronome maintain sample-accurate timing?
Standard JavaScript `setInterval` and `setTimeout` suffer from thread blocking and browser event-loop jitter, causing audible tempo instability. This metronome uses Chris Wilson's Web Audio API lookahead scheduler, queueing audio events directly onto the hardware audio thread with microsecond precision.
How does the Tap Tempo feature work?
The Tap Tempo button records the high-resolution timestamps (`performance.now()`) of your taps, calculates the time intervals between consecutive taps, and computes the rolling average to determine your exact tempo in Beats Per Minute (BPM).
What are the common classical tempo markings and their BPM ranges?
Standard markings include: Largo (40–60 BPM), Adagio (66–76 BPM), Andante (76–108 BPM), Moderato (108–120 BPM), Allegro (120–156 BPM), Vivace (156–176 BPM), and Presto (168–200 BPM).
Can I practice polyrhythms and complex meters like 6/8 or 7/8?
Yes. You can select compound meters like 6/8 (subdivided into dotted quarter pulses) and odd meters like 5/4 and 7/8 with accented primary downbeats.
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