Is my audio uploaded?

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

How is the energy score calculated?

It is the unweighted average of four measured components: integrated loudness mapped from −30 to −6 LUFS, rhythmic activity from onsets per second, spectral activity from the share of energy above 1.2 kHz, and density from the inverted peak-to-loudness ratio. Every component is shown next to the score.

Is this the same as Spotify's energy value?

No. Streaming platforms use private models trained on their own data. This score is a transparent combination of measurable features, published so you can check it, and it will not match any platform's number.

Why not just use loudness?

Because a loud, slow, dark drone and a loud, fast, bright arrangement are not equally energetic. Loudness is one of four components here, so rhythm and spectral content can move the score independently.

Does a higher score mean a better track?

No. It describes measured activity, nothing else. Sparse, quiet music scoring low is not a fault — it is an accurate description.

Free tool

Music Energy Analyzer

An energy figure you can audit: four measured components, each shown with the raw measurement behind it.

Your file is decoded and measured 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

"Energy" is not a physical quantity, so any single number for it is a construction. The honest approach is to say exactly how it was built: this tool averages integrated loudness (−30 to −6 LUFS), rhythmic activity (onsets per second, 0.5 to 6), spectral activity (share of energy above 1.2 kHz) and density (peak-to-loudness ratio, inverted).

Deliberately, loudness is only a quarter of it. Mapping LUFS to energy would mean a limited ambient master outranks an unlimited breakbeat, which nobody hearing them would accept. Rhythm and spectral content are measured separately so they can move the result.

Use it to compare your own material — versions of a mix, tracks being sequenced for an EP, or reference tracks you want to sit alongside. It is a description, not a grade.

FAQ

Frequently asked questions

Toolbox

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Train your sound. Generate your song.

ANYANO is the bigger version of this: prepare music you own, train a Sound that stays private to your account, then generate from it.