WKRD Label & Publishing Co.

Browser-Based Music Analysis

WKRD Essentia Audio Analyzer

Upload a song or recording and inspect tempo, musical key, loudness, dynamics, spectral brightness, peak level, clipping, stereo balance, beat positions, and technical file information. The audio is analyzed inside your browser.

Local browser analysis No account required JSON and CSV export Printable report

Loading the Essentia.js audio engine…

Choose an audio file

MP3, WAV, M4A, OGG, FLAC, and other formats may work when the visitor’s browser can decode them.

Drop a song here

or choose an audio file from your computer

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Songs longer than 10 minutes are analyzed using the first 10 minutes to protect browser memory. Analysis time depends on the computer, browser, file length, and audio format.

Your analysis will appear here Select a recording, then press Analyze Audio.

Waveform and detected beats

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Waveform Detected beat

Tempo

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Detected beats per minute

Musical Key

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Estimated tonal center

Integrated Loudness

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Overall EBU R128 loudness

Peak Level

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Highest sample peak

Dynamic Complexity

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Loudness fluctuation measure

Loudness Range

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EBU loudness range

Spectral Centroid

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Approximate spectral brightness

Clipping

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Samples at or near full scale

Audio measurements

Average RMS—

Crest factor—

ReplayGain estimate—

DC offset—

Near-silence samples—

Stereo balance—

Detected beat count—

Tempo confidence—

File information

File name—

File size—

Duration—

Analyzed duration—

Sample rate—

Channels—

Browser MIME type—

Essentia engine—

What should you compare your song to?

The best comparison is not one universal number. Choose two or three professionally released songs that are close to your song in genre, instrumentation, vocal style, tempo, production era, and intended use. Turn the reference songs down until they sound about as loud as your song. Then compare tone, vocal level, bass, drums, brightness, width, punch, and overall clarity. Volume-matching is important because the louder recording often sounds better even when it is not actually better.

Good basic reference: compare your finished song to a commercially released song in the same style—not to an unrelated chart hit, an unmastered demo, a low-quality online upload, or a song that is simply much louder.

Peak level and clipping

Zero clipped samples is the safest result. A sample peak near −1 dBFS or lower leaves useful headroom for MP3, AAC, and streaming conversion. Peaks closer to 0 dBFS are not automatically bad, but they deserve a careful distortion check.

Integrated loudness

About −18 to −14 LUFS usually feels more open or dynamic. About −14 to −9 LUFS is common for louder modern music. Above roughly −9 LUFS can sound very dense or aggressively limited. These are comparison zones, not required targets.

Loudness range

Roughly 3–6 LU is tightly controlled and common in dense pop or rock. Around 6–12 LU usually feels more open. Higher values can fit acoustic, orchestral, cinematic, or intentionally dramatic recordings.

Crest factor

Under about 6 dB often indicates heavy compression or limiting. Around 6–12 dB is controlled but still punchy. Above 12 dB is more dynamic. Genre and arrangement matter more than chasing one perfect number.

Stereo balance and DC offset

A left/right difference within about 1 dB generally reads as centered unless the arrangement is intentionally uneven. DC offset should stay very close to zero; an absolute value below 0.01 is a useful basic check.

Brightness, tempo, and key

These do not have universal good or bad values. Compare brightness to songs with similar instruments and production. BPM describes movement and feel. Key helps with musical context, matching songs, and planning harmonies.

Your song compared with a general finished-music reference

This section translates the measurements into normal language. It is a general technical comparison; your same-genre reference songs remain the final standard.

Analyze a song to generate its comparison summary.

Technical observations

These measurements are estimates, not a mastering approval, copyright determination, originality test, or AI-content detector. Results can vary with arrangement, genre, recording quality, browser decoding, and the portion of audio analyzed.