> ## Documentation Index
> Fetch the complete documentation index at: https://support.vocuno.com/llms.txt
> Use this file to discover all available pages before exploring further.

# BPM Detector

> Detect the tempo of any audio file instantly — runs in your browser, no credits required.

<Card title="BPM Detector Tool" icon="gauge" href="https://vocuno.com/app?tool=bpm-detector">
  Try it now! ↗️
</Card>

The **BPM Detector** analyzes an audio file and tells you its tempo — useful for matching beats, planning remixes, or syncing layers in the [Studio](/using-the-studio). Detection runs entirely in your browser, so the audio never leaves your device.

## How to use it

Drop in an audio file (MP3, WAV, FLAC, OGG, M4A, AAC) or pick one from your library. The tool decodes the track locally with `web-audio-beat-detector` and returns a BPM value between 20 and 300. You can also override the detected value manually if you already know the tempo.

## Frequently asked questions

<AccordionGroup>
  <Accordion title="Does it cost credits?">
    No — BPM detection runs in your browser and doesn't consume any credits.
  </Accordion>

  <Accordion title="Does it return the key or scale?">
    No, only BPM. Key/scale detection isn't part of this tool.
  </Accordion>

  <Accordion title="What if the detection is wrong?">
    You can override the BPM with any value between 20 and 300 — useful for half-time / double-time songs where the algorithm picks the wrong multiple.
  </Accordion>

  <Accordion title="What audio works best?">
    Tracks with a clear, consistent beat. Free-tempo or rubato performances may not return a meaningful BPM.
  </Accordion>
</AccordionGroup>