AudioKitHow it works
Tap the button twice or more at a steady pace. The first tap marks a starting point; later taps provide intervals for the BPM estimate. AudioKit averages the most recent eight intervals. A gap longer than five seconds starts a new measurement, and very rapid duplicate taps are ignored. The measured value is shown separately from the rounded whole-number metronome tempo.
Formula
BPM = 60,000 ÷ average interval in milliseconds. For example, a 500 millisecond average interval produces 120 BPM. Tap one consistent musical pulse; the tool cannot decide whether you are tapping quarter notes, half notes or subdivisions.
Example
A song can feel like 70 BPM or 140 BPM depending on which pulse you tap. Count consistently and compare the result by starting the metronome. Estimates outside 20–300 BPM are displayed but are not sent to the metronome. The T shortcut works when focus is outside form fields and buttons, so typing a practice focus does not trigger taps.
Assumptions and limitations
Use one clear sustained note for tuning. Noise, harmonics, room acoustics and microphone quality can affect the reading. Reference tones and clicks may be picked up by the microphone; use headphones when combining tools. This is a browser practice aid, not a calibrated measurement instrument.
Frequently asked questions
Do I need an account or an app?
No. The tools run in a modern browser. Audio starts from a button press, and the tuner needs microphone permission on HTTPS or localhost.
Is microphone audio recorded or uploaded?
No. Audio is analyzed locally in memory. It is not recorded, uploaded or played back through the speakers.
What happens when I leave the tab?
The metronome and tones stop, the microphone is released and the session timer pauses. Start again when you return.