Audacity Forum

Kratos291 wrote: ↑

Sat Aug 08, 2020 7:17 pm

I attached 2 sample files, the first one is the one Audacity processed with DRC Enabled, the second one with DRC Disabled. Hear for yourself.

Interesting. Have you tried measuring the crest factor of those samples?

I don't think it was intended by the makers for the audio Then why did they do it? No idea. Maybe it's something that the official AC3 tool companies use does to the audio when making it Dolby Digital AC3. Thing is, only AC3 has this issue. AAC for instance, doesn't have this issue. for the audio t...

I don't think it was intended by the makers for the audio Then why did they do it? for the audio to be played in very low volume According to Sony , the compression makes the audio louder :? The following are explanations for each setting: Standard: This mode takes the widest dynamic range (the dif...

... makemkv and extract AC3 files losslessly from mkvs with mkvcleaver. 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 ...

I think this could be argued either way. 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. Disabling drc_scale causes playback to be different from what was intended by the makers of the DV...

... shows the wave form when importing a commercial AC3 directly in Audacity. It's dynamic range compressed and has a lower volume. I don't know what FFmpeg is doing but the top-smaller waveform looks MORE dynamic (less compression). The bottom waveform appears to be limited. The peaks are all the ...

... I'm doing is I sync audio tracks from a low quality cut video source to a high quality uncut video source. During import of ac3 files, audacity's ffmpeg has -drc_scale set to 1, which does a bad dynamic range compression and lowering the volume. Please explain what the problem is in more detail. ...

... you've selected the USB device as your Recording Device . (It will probably say "USB CODEC".) Also error messages in my run log about ffmpeg and avformat files not being found. Unrelated and not really an "error". FFmpeg is optional and it allows you to import/export a wide ...

Hi I use Windows 10 with Audacity 2.4.2. I'm trying to record from Reshow usb tape deck. I'm getting a result but a very low volume one plus a lot of noise from tape motor. Also error messages in my run log about ffmpeg and avformat files not being found. Are two problems connected?

... professional audio production. Don't you have an uncompressed version of the source material to work with? During import of ac3 files, audacity's ffmpeg has -drc_scale set to 1, which does a bad dynamic range compression and lowering the volume. Please explain what the problem is in more detail. ...