JonathanD — Clean up
Original master
A real loud club master. It already runs true-peak over 0 dBTP — common in club-loud electronic music.
- Integrated
- −7.5 LUFS
- True-peak
- +1.8 dBTP
- LRA
- 1.7 LU
- Correlation
- 0.67
/reference
Reference audio.
Like the reference kilogram, but for sound. Every file here is hosted on this page and measured by the AudioLab engine — the numbers are published so you can run the exact same file and reproduce them. Real masters, deliberate problem cases, and calibration signals. Don’t trust the numbers — check them.
Music by JonathanD (electro) and Ibiza Spirit (lounge) — the maker’s own releases, used with permission. Derived and calibration files are generated.
01 Masters & problem cases
JonathanD — Clean up
Normalized to −14 LUFS (Spotify)
The same clip normalized to the Spotify target. This is what streaming plays back — and the true-peak is now safely under 0.
- Integrated
- −14.4 LUFS
- True-peak
- −5.8 dBTP
- Crest
- 11.2 dB
- Correlation
- 0.67
JonathanD — Clean up
Pushed +14 dB into clipping
Deliberately overdriven. Peak and true-peak sit far over 0 dBFS — the recipe for audible distortion on any real playback chain.
- Integrated
- +0.3 LUFS
- True-peak
- +4.9 dBTP
- Crest
- 7.7 dB
- Peak
- +4.9 dBFS
JonathanD — Clean up
Summed to mono
Folded to mono — what a single phone or club-sub speaker hears. Stereo correlation reads a perfect 1.0.
- Correlation
- 1.00
- Mono-safe
- yes
- Integrated
- −8.7 LUFS
- True-peak
- +0.0 dBTP
Ibiza Spirit — Jazz Club
Original master
A real lounge / downtempo master: loud, wide, warm — and, like a lot of masters, true-peak just over 0.
- Integrated
- −8.3 LUFS
- True-peak
- +1.8 dBTP
- Correlation
- 0.89
- Centroid
- 2.2 kHz
Ibiza Spirit — Jazz Club
Big 2–4 kHz boost
A heavy presence-band boost. AudioLab flags harshness: High — the fatiguing, edgy zone your ears tire of first.
- Harshness
- High
- Centroid
- 2.9 kHz
- Integrated
- −4.1 LUFS
- True-peak
- +3.9 dBTP
Ibiza Spirit — Jazz Club
200–400 Hz hump, neighbours cut
A boxy 200–400 Hz bump lifted above the bands on either side. AudioLab flags muddiness: Medium — the metric is relative, so it catches a hump, not just bass.
- Muddiness
- Medium
- Integrated
- −10.6 LUFS
- True-peak
- +1.0 dBTP
- Crest
- 13.8 dB
Ibiza Spirit — Jazz Club
One channel polarity-flipped
The right channel is inverted. Correlation reads −0.89 and mono-compatible is false — it partly cancels itself the moment it folds to mono.
- Correlation
- −0.89
- Mono-safe
- no
- Crest
- 23.7 dB
- Integrated
- −8.3 LUFS
02 Calibration signals
Known-value signals with exact levels. Run them through any meter (or AudioLab) — if the numbers match, it is calibrated. These are the truest “golden” references.
1 kHz sine
Normalized to −23 LUFS
A pure 1 kHz tone at the EBU R128 reference level. Crest factor is 3.0 dB — the textbook value for a sine. If your meter agrees, it is calibrated.
- Integrated
- −23.3 LUFS
- Crest
- 3.05 dB
- Centroid
- 1.0 kHz
- True-peak
- −23.2 dBTP
Pink noise
Normalized to −23 LUFS
Broadband pink noise at −23 LUFS — a stable reference for level, spectrum and stereo tools.
- Integrated
- −23.5 LUFS
- True-peak
- −12.6 dBTP
- LRA
- 0.0 LU
- Correlation
- 1.00
Reproduce it
Copy any file’s URL above and send it to the API — you should get the same numbers we published.
curl https://audiolab.tools/v1/mixlab/analyze \
-H "Authorization: Bearer $AUDIOLAB_KEY" \
-H "Content-Type: application/json" \
-d '{"url":"https://audiolab.tools/reference/jd-original.mp3"}'