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docs: fix broken links

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jo 2022-02-09 11:41:25 +01:00 • committed by Jonas L
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docs/guides/preparing-media.md
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@ -13,7 +13,7 @@ There are a number of programs available which can be used to correct mistakes o
- [TagScanner](https://www.xdlab.ru/en/) (Windows)
- [Mp3tag](https://www.mp3tag.de/en/index.html) (Windows)
- [MusicBrainz Picard](https://picard.musicbrainz.org/) (Mac, Windows, Linux)
- [Ex Falso](http://code.google.com/p/quodlibet/) (Linux)
- [Ex Falso](https://code.google.com/p/quodlibet/) (Linux)
The _Tags From Path_ feature of Ex Falso is a particularly useful time saver if you have a large archive of untagged files. Sometimes there is useful creator or title information in the file name or directory path structure, which can be converted into an ID3 tag automatically.
@ -53,11 +53,11 @@ The name of the original character set follows the **-e** option. Other legacy c
## Audio loudness
On file ingest, LibreTime analyzes each Ogg Vorbis, MP3, AAC or FLAC file's loudness, and stores a _ReplayGain_ value for that file in its database. At playout time, the ReplayGain value is provided to Liquidsoap so that gain can be automatically adjusted to provide an average output of -14 dBFS loudness (14 decibels below full scale). See <http://www.replaygain.org/> for more details of ReplayGain.
On file ingest, LibreTime analyzes each Ogg Vorbis, MP3, AAC or FLAC file's loudness, and stores a _ReplayGain_ value for that file in its database. At playout time, the ReplayGain value is provided to Liquidsoap so that gain can be automatically adjusted to provide an average output of -14 dBFS loudness (14 decibels below full scale). See https://en.wikipedia.org/wiki/ReplayGain for more details of ReplayGain.
Because of this automatic gain adjustment, any files with average loudness higher than -14 dBFS will not sound louder than quieter files at playout time, but the lower crest factor in the louder files (their relatively low peak-to-average ratio) may be apparent in the output, making those files sound less dynamic. This may be an issue for contemporary popular music, which can average at -9 dBFS or louder before ReplayGain adjustment. (See <http://www.soundonsound.com/sos/sep11/articles/loudness.htm> for a detailed analysis of the problem).
Because of this automatic gain adjustment, any files with average loudness higher than -14 dBFS will not sound louder than quieter files at playout time, but the lower crest factor in the louder files (their relatively low peak-to-average ratio) may be apparent in the output, making those files sound less dynamic. This may be an issue for contemporary popular music, which can average at -9 dBFS or louder before ReplayGain adjustment. (See <https://www.soundonsound.com/sound-advice/dynamic-range-loudness-war> for a detailed analysis of the problem).
Your station's producers should therefore aim for 14dB between peak and average loudness to maintain the crest factor of their prepared material (also known as _DR14_ on some dynamic range meters, such as the command-line DR14 T.meter available from <http://sourceforge.net/projects/dr14tmeter/>). If the producers are working to a different loudness standard, the ReplayGain modifier in LibreTime's Stream Settings page can be adjusted to suit their material.
Your station's producers should therefore aim for 14dB between peak and average loudness to maintain the crest factor of their prepared material (also known as _DR14_ on some dynamic range meters, such as the command-line DR14 T.meter available from <https://sourceforge.net/projects/dr14tmeter/>). If the producers are working to a different loudness standard, the ReplayGain modifier in LibreTime's Stream Settings page can be adjusted to suit their material.
Large transient peaks in otherwise quiet files should be avoided, to guard against the need for peak limiting when ReplayGain is applied to those quieter files.