Ogg Vorbis utilities
vorbisgain
vorbisgain (Figure 7) is not packaged with vorbis-tools, but it is a related tool that you might want to download at the same time [3]. The utility is intended to maintain a uniform sound or replay gain across files on the same album.
Figure 7: vorbisgain smooths out the volume levels of both albums and individual files.
To begin using vorbisgain, enter the command
vorbisgain --album ./*.ogg
adding the --recursive option if some of the files to modify are in subdirectories. The command returns the settings for each file with the same directory comment and a recommended setting that is usually the average of all the files. The gain on each file can then be set with the option --album-gain=SETTING. You may want to preserve file attributes with the --preserve-m-time option. Should the results not to be to your liking, you can use --clean to remove the gain comments created by vorbisgain before making adjustments.
Adding Control
When these utilities are added to a system, the Ogg Vorbis format becomes a much more attractive alternative. In particular, ogg123 is a compact music player, while, aside from its specialization, vorbiscomments is one of the most versatile editors for meta-comments that I have found. As for vorbisgain, I can think of no other audio format for which a similar command-line tool is available. You may not always need all the available Ogg utilities, but they make the format more of an option than it is by itself.
Infos
- Ogg Vorbis format: https://en.wikipedia.org/wiki/Vorbis
- vorbis-tools: https://github.com/xiph/vorbis-tools
- vorbisgain: https://sjeng.org/vorbisgain.html
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