AudioKitHow it works
Enter the quarter-note tempo of your track. The table lists delay times for a whole note, half note, quarter note, eighth note, sixteenth note and thirty-second note. Straight, dotted and triplet columns make it easy to transfer a rhythmic setting to an effect that accepts milliseconds. Values are rounded for display while calculations use full precision. Copy the table or download its numeric CSV.
Formula
Quarter-note milliseconds = 60,000 ÷ BPM. Multiply by four for a whole note or divide by two for an eighth note. Dotted values are the straight duration × 1.5. Triplet values are the straight duration × 2/3.
Example
At 120 BPM a quarter note is 500 ms, a dotted quarter is 750 ms and a quarter-note triplet is approximately 333.333 ms. An eighth note is 250 ms, a dotted eighth is 375 ms and an eighth-note triplet is approximately 166.667 ms. These are timing targets, not an audio delay processor or a measure of your device latency.
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.