Is my track uploaded?

No. The file is decoded and analysed by your browser inside the page, so nothing leaves your device.

How is the danceability score calculated?

Four measured components, weighted: beat strength at the detected tempo (35%), pulse regularity across 1, 2 and 4 beat multiples (30%), tempo fit against a 90–140 BPM window (20%) and low-end weight below 200 Hz (15%). Each component is shown next to the score.

Is this Spotify's danceability metric?

No, and it does not claim to reproduce it. Spotify uses a private model; this is a transparent, experimental combination of rhythm measurements you can inspect and disagree with.

Why did a track I dance to score low?

Because danceability is subjective and this is signal analysis. Swung, sparse, half-time or unusually paced music can carry a floor while measuring as a weak or irregular pulse. Treat a low score as a description of the pulse, not a verdict on the track.

What is beat strength?

The correlation of the onset envelope with itself at the detected beat period, as a share of its total energy. High values mean events land consistently on the beat; low values mean the pulse is implied rather than played.

Experimental tool

Danceability Analyzer

An experimental read on pulse: beat strength, regularity, tempo and low-end weight, combined with weights you can see.

Your file is decoded and analysed in this browser tab. Nothing is uploaded, nothing is stored.

Your audio

Analysed in this tab. Nothing is uploaded or stored.

Choose an audio file

WAV, MP3, FLAC, AIFF, M4A, OGG — up to 250 MB. Five seconds or longer.

Detail

How this works

Danceability is a preference, not a measurement, so this tool is explicitly experimental. What it can measure is the pulse: how strongly onsets line up with the detected beat, how evenly that pattern repeats over one, two and four beats, where the tempo sits, and how much energy is carried below 200 Hz.

Those four figures are combined at 35%, 30%, 20% and 15% respectively. The weights are published because the number is only useful if you can see what produced it and adjust your reading of it. It is not Spotify's danceability value and makes no claim to match it.

The practical use is comparison within your own catalogue: which of two drafts drives harder, whether a swung edit lost the pulse, or how a reference track measures against what you have made.

FAQ

Frequently asked questions

Toolbox

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