![]() If the producers are working to a different loudness standard, the ReplayGain modifier in Airtime'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 ). (See for a detailed analysis of the problem). This may be an issue for contemporary popular music, which can average at -9 dBFS or louder before ReplayGain adjustment. See for more details of ReplayGain.īecause 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. ![]() 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). On file ingest, Airtime analyzes each Ogg Vorbis, MP3, AAC or FLAC file's loudness, and stores a ReplayGain value for that file in its database. ![]() Other legacy character sets that mid3iconv can convert to UTF-8 include: The name of the original character set follows the -e option. To actually convert all of the tags and strip any legacy ID3v1 tag present from each file at the same time, you could use the command: find. This preview will enable you to confirm that the metadata is being read and converted correctly before writing the new tags. The -d option specifies that the new tag should be printed to the server console (debug mode), and the -p option specifies a preview run. You can install python-mutagen with the command: sudo apt-get install python-mutagenįor example, to preview the conversion of tags from Windows-1251 (CP1251) character set to UTF-8 for a whole archive of MP3 files, you could use the command: find. The program mid3iconv (part of the python-mutagen package in Debian and Ubuntu) can be used to batch convert the metadata character set of files on the command line. If you have an archive of files encoded with metadata in a legacy character set, such as the Cyrillic encoding Windows-1251, you should convert these files before import. Programs such as Ex Falso (described above) encode metadata in UTF-8 by default. 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.Īirtime expects file tag metadata to be stored in the international UTF-8 character set. The Tags From Path feature of this program is a particularly useful time saver if you have a large archive of untagged files. On a Debian or Ubuntu desktop machine, you can install this program with the command: sudo apt-get install exfalsoĪfter installation, you can run this program with the command: exfalso On GNU/Linux, the program Ex Falso ( ) can be useful for batch setting and editing ID3 tags before importing files into your Airtime server. There are a number of programs available which can be used to correct mistakes or incomplete information in ID3 tags. For example, if the files have creator or genre metadata missing, it will be impossible to search for, create playlists or generate smart blocks according to these criteria until you add it. ![]() If these tags are incorrect or are missing information, you will have to either edit the metadata manually, or suffer the consequences. Metadata qualityĪirtime automatically imports any metadata that is in the files' ID3 tags. Getting your ingest workflow right will save you a lot of time later. Before uploading media to an Airtime server, there are a number of factors which should be considered.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |