Disney long form (stereo) loudness spec
What a file has to measure to pass this spec, and where each figure comes from.
Disney’s Production Audio spec (Media Tech Specs v1.7) covers episodic, feature and direct-to-consumer programmes, not adverts. Stereo mixes must measure −24 LKFS (±0.4) from the first frame of action to the last, with BS.1770 gating, and true peak no higher than −2 dBTP. The loudness range of 0 to 20 LU is a guideline only, so LC-1 shows it as a warning. Disney’s surround mixes are measured on dialogue instead (−27 LKFS ±0.4), which LC-1 does not do yet. LC-1 checks a WAV against this spec in seconds, applies the necessary level change and true-peak limiting, and prints a compliant file.
| Check | Required | In LC-1 |
|---|---|---|
| Integrated loudness | −24.0 ±0.4 LKFS | Fixed with a level change |
| True peak | −2.0 dBTP max | Limited, with audition |
| Loudness range | 20 LU max, guideline | Warning only |
Worth knowing
For episodic, feature and direct-to-consumer programmes, not adverts. Loudness is measured from the first frame of action to the last, with BS.1770 gating (G10). The loudness range of 0 to 20 LU is a guideline only, so it shows as a warning. Disney’s surround mixes are measured on dialogue instead (−27 LKFS ±0.4, −20 LKFS maximum), which LC-1 does not do yet.
Data source(s)
- Disney Media Tech Specs, Production Audio v1.7, 24 January 2024, Loudness Standards
Figures taken from the documents above and last read on 3 November 2026.
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