Japan broadcast radio commercials 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 ±1 LKFS | Fixed with a level change |
| True peak | −1.0 dBTP max | Limited, with audition |
| Top and tail silence | 0.1 s under −60 dBFS | Muted, with audition |
Worth knowing
Between 0.1 and 0.5 seconds of silence is required at the head and at the tail.
Data source(s)
- JAAA radio committee Q&A on the radio commercial delivery standard, 1 October 2024
Figures taken from the documents above and last read on 10 October 2026, as quotes extracted from the source: confirm against the full document before relying on it.
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