![]() ![]() Files that don’t have DRC ignore the drc flag and import as usual and files with drc will import in their full quality. There is nothing to lose if you disable drc_scale, only things to gain. I guess the ideal solution would be for Audacity to provide an option for the drc_scale setting, though I’m inclined to think that the default should be as it is now.Īn option for drc_scale is a possibility, but the default should never be as it is now because drc_scale literally has only disadvantages. As I said, now that I know of the drc_scale issue, I always convert AC3s with ffmpeg to proper waves with drc_scale disabled before importing them in audacity, but this step should be included in audacity’s ac3 import function imo. I rip DVDs losslessly with makemkv and extract AC3 files losslessly from mkvs with mkvcleaver. On the practical level, when ripping a DVD, does your DVD ripper not have the option to rip to WAV? Does the DVD ripper not have an option to ignore the Dolby DRC? I finished my project using audacity unbeknownst of the drc_scale issue and all my videos sound worse than the source videos/source DVDs. It’s only when you import it in audacity, it’s when the quality degrades a lot. The raw AC3 plays just fine when played by basically all media players. I don’t think it was intended by the makers for the audio to be played in very low volume and obviously very compressed sounding. Disabling drc_scale causes playback to be different from what was intended by the makers of the DVD as they will expect their specified dynamic range compression to be used by default. DVD players default to using the Dolby dynamic range compression when present, and DVD makers choose how much dynamic range compression will be used by default. As such, own created AC3 files don’t have the DRC issue. If I encode as AC3 on export from Audacity (with high bit rate to reduce losses), and then import that AC3 file back into Audacity, I’m not seeing any dynamic range compression, so I’m unsure what problem you are referring to.Īudacity/ffmpeg doesn’t apply dynamic range compression on file export. Please explain what the problem is in more detail. What I’m doing is I sync audio tracks from a low quality cut video source to a high quality uncut video source.ĭuring import of ac3 files, audacity’s ffmpeg has -drc_scale set to 1, which does a bad dynamic range compression and lowering the volume. The audio I’m editing is from a DVD and as such I’m limited to using the compressed ac3 files from that DVD. Don’t you have an uncompressed version of the source material to work with? Using compressed audio formats during production is one of the cardinal sins for professional audio production. ![]()
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