Tap along with a song for a few beats and the tempo appears: the counter averages up to your last 8 intervals and ignores taps more than 25% off, so one slip does not ruin the reading. Pause for over 2 seconds to start a fresh count.
How to use
- Metronome: drag the ring, use − and +, or click the number to type a tempo. Press Start.
- Choose the time signature, subdivision and sound. Tap a beat dot to switch it between accent, normal and silent.
- Speed up raises the tempo by a set amount every few bars until it reaches your target.
- Tuner: pick an instrument, press Start tuner and allow the microphone. Play one string; tune until the needle is centered and turns green.
- BPM: drop a song to detect its tempo and play it with a click to check, or tap along on the pad.
- Clicks are scheduled ahead on the audio clock, so timing stays steady even when the tab is in the background.
- The tuner uses the YIN pitch method and reads notes from about 30 Hz to 2 kHz. A quiet room helps with low bass strings.
- BPM detection looks for repeating onsets in up to 150 seconds of the track. If the result is half or double the tempo you hear, use the second value shown.
- Microphone audio and songs are processed on your device and never uploaded.
How tempo detection works
The detector looks at up to 150 seconds of the track, finds note onsets (sudden rises in energy, such as drum hits) and measures which beat interval repeats most strongly. Steady electronic, pop and rock music gives the clearest result; rubato classical pieces, live recordings with drifting tempo and tracks without percussion are harder.
The file is decoded in your browser and never uploaded.
Half time and double time
A song at 140 BPM can feel like 70, and 85 BPM hip-hop can be counted at 170. Both readings describe the same groove, so the finder shows a second value; pick the one that matches how you count the beat. Checking with the click track makes the difference obvious.
Tap tempo tips
Tap on the main beat, usually the kick or the snare, for at least eight taps. The counter averages the last intervals and ignores outliers, and a pause of more than two seconds starts over. Send the result straight to the metronome to practise at that tempo.
Frequently asked questions
How do I find the BPM of a song?
Drop the audio file on the page or choose it from your device. The BPM appears after a few seconds; press play to hear it with a click and confirm.
Is my audio file uploaded?
No. The file is decoded and analysed in your browser, so it never leaves your device.
Why is the BPM half or double what I expected?
Tempo detection can lock onto half time or double time, especially in hip-hop, trap and drum and bass. Use the second value shown or check by tapping along.
How many taps do I need for tap tempo?
Two taps give a first value, but eight or more give a stable reading. Keep tapping in time and the number settles.
Which file formats work?
Any audio format your browser can decode, which usually includes MP3, WAV, AAC/M4A, OGG and FLAC.