Quote:
Originally Posted by FranceBB
Besides, I need my audio to be as close as possible to -24 LUFS. We generally use a machine called "Sony DP 600" to achieve this. Is there a similar way to achieve this via avisynth?
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As far as I know, no, there isn't. You need a DAW and proper plugins to do that. -24db(-23, depending on the program) LUFS is the standard and is not so loud. If you normalize by peak you can get totally wrong results. Think of an inaudible audio with just a single peak at -3 dB, you'll get your audio boosted by only 2dB. The LUFS in that case will be even lower than -24 (probably -30) so it will be rejected. The other case, a very compressed (by dynamic range) audio where you have plenty of spikes at -5dB, you'll get a boost of 4dB so a very louder audio will be even louder. The LUFS in that case will probably be -18 or even higher. Normalizing by peak is, almost always, a bad choice.
If you can't access to a DAW/plugins, you can get decent results normalizing by RMS, with a target value of -26/-27dB. Still, this may be fine for non-professional jobs, because if you deliver the audio for broadcasting, you need to strictly follow the EBU standard.