China online video loudness spec (GY/T 377-2023)
What a file has to measure to pass this spec, and where each figure comes from.
Online video in China follows GY/T 377-2023, the national industry standard for the loudness of online audiovisual content that isn’t live. It allows an average loudness of either −24 or −15 LKFS, with a tolerance of no more than ±2 LU, as long as the level stays consistent, and a platform may offer both versions. True peak must be no higher than −1 dBTP. This page checks the −24 LKFS version. 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 ±2 LKFS | Fixed with a level change |
| True peak | −1.0 dBTP max | Limited, with audition |
Worth knowing
GY/T 377 allows either −24 or −15 LKFS, as long as the level stays consistent, and a platform may offer both versions. It covers online content that is not live. For concerts and other content with little dialogue it suggests measuring the dialogue; LC-1 measures the whole file.
Data source(s)
- GY/T 377-2023 网络视听节目音频响度技术要求和测量方法 (loudness of online audiovisual content), 18 August 2023
Figures taken from the documents above and last read on 22 October 2026.
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