USA commercial TV loudness spec
What a file has to measure to pass this spec, and where each figure comes from.
| Check | Required | In LC-1 |
|---|---|---|
| Integrated loudness | −24.0 ±2 LKFS | Fixed with a level change |
| True peak | −2.0 dBTP max | Limited, with audition |
| Format | 48 kHz | Flagged |
Worth knowing
A/85 says not to aim at either edge of the ±2 window. XR recommends keeping true peak under −6 dBTP to avoid rejections.
Data source(s)
- ATSC A/85:2026-07 (the FCC’s CALM Act rules cite A/85:2013)
- XR North America spec
Figures taken from the documents above and last read on 10 October 2026.
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