Submitting an overly compressed, brickwalled commercial pop master to a film/TV re-recording mixer will immediately trigger rejection. Broadcast networks in North America and Europe enforce strict statutory loudness caps under the CALM Act and EBU R128 legislation to prevent jarring volume jumps between programs and commercials.
Global Loudness Targets at a Glance
| Platform / Standard | Target Integrated LUFS | Max True Peak (dBTP) | Permitted Tolerance |
|---|---|---|---|
| EBU R128 (European Broadcast) | -23.0 LUFS | -1.0 dBTP | ±0.5 LU |
| ATSC A/85 (US CALM Act) | -24.0 LUFS | -2.0 dBTP | ±1.0 LU |
| Film Trailers & Cinema | -27.0 LUFS | -2.0 dBTP | ±1.0 LU |
| Streaming & Commercial Sync | -14.0 LUFS | -1.0 dBTP | ±1.0 LU |
True Peak vs. Sample Peak: Why Intersample Clipping Breaks Submissions
Traditional digital sample peak meters measure the highest discrete numerical sample in an audio file. However, during digital-to-analog conversion in television sets and consumer receivers, the reconstructed analog waveform frequently overshoots between sample points. These intersample peaks produce severe harmonic distortion and audible clipping on digital television broadcasts. Calibrating true peak lookahead limiters with a minimum 4x oversampling ceiling of -1.0 dBTP or -2.0 dBTP guarantees broadcast compliance.