flac: added link to picard

wiki/linux/flac.md

@@ -0,0 +1,22 @@
+# Flac
+
+`flac` - short for Free Lossless Audio Codec - is a audio codec without
+compression losses.
+On most distributions it is bundled together with the tagging software
+`metaflac` and other auxiliary tools in the `flac` package.
+
+## Splitting Flac file according to cue file
+
+An easy way to split flac files according to a cue file is using
+`cuebreakpoints` and `shnsplit`.
+On most distributions they are in a package with the same name.
+The following line of shell command splits a flac file according to a cue file.
+The `-o` tag specifies the output file format.
+
+```sh
+cuebreakpoints '<cue file>' | shnsplit -o flac '<audio flac file>'
+```
+
+## Tagging
+
+For tagging go to the [MusicBrainz Picard entry](../picard.md).

wiki/music.md

@@ -21,8 +21,26 @@ This way you don't have to search for your CDs all the time.
 
 - [Exact Audio Copy](https://www.exactaudiocopy.de) for windows can rip music
   and automatically tag it with the help of a list of databases.
-- [metaflac](https://linux.die.net/man/1/metaflac) for linux is a programm
+- [metaflac](./linux/flac.md) for linux is a programm
   to edit the tags of flac files from the command line.
   It is bundled in the `flac` package for debian and arch based systems.
-- [MusicBrainz Picard](https://picard.musicbrainz.org/) for linux is a
+- [MusicBrainz Picard](./picard.md) for linux is a
   graphical user interface for tagging files of many different formats.
+
+## Quality analysis of different versions of an album
+
+While deciding on what version of an album is the best visit
+[Dynamic Range DB](https://dr.loudness-war.info).
+It shows dynamic range scorings of each version.
+
+## Get additional data to an album/single
+
+If additional information for an album is needed, visit
+[Discogs](https://www.discogs.com).
+Discogs has tracklists, dates and more information to nearly all versions of
+albums and singles.
+
+## Working with flac files on Linux
+
+If you are on a Linux system and have flac files to work with visit
+[the flac entry](./linux/flac.md).

wiki/picard.md

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+# Picard
+
+[MusicBrainz Picard](https://picard.musicbrainz.org/) is a free cross-platform
+tagging software for music.
+
+## File naming
+
+To enable the file renaming on saving check `Rename files when saving` in the preferences
+
+Under `Options` you can `Open file naming script editor` to change the script.
+
+The following is a basic script for renaming files to the scheme
+`[<discnumber>.]<tracknumber>._<artist>_-_<title>`
+all in lower case.
+discnumber is only added, when the total disc count is greater than 1.
+Both discnumber and tracknumber are padded according to the number of total
+discs and tracks.
+The tracknumber is padded to at least 2 places.
+
+```
+$replace($lower(
+$if($gt(%totaldiscs%,1),$num(%discnumber%,$len(%totaldiscs%)).,)
+$num(%tracknumber%,$if($gt($len(%totaltracks%),2),$len(%totaltracks%),2))._
+%artist%_-_
+%title%), ,_)
+```
+
+## Tagging
+
+The following explains the most general tags in short.
+These are the recommended tags, that are in part used by the script for
+renaming the files.
+
+- `title` is the name of the music piece.
+- `artist` is the artist of the song - for classical music it is the composer.
+- `album` is the name of the album.
+- `tracknumber` is the number of the music piece in the album
+- `date` is the year of publication
+- `albumartist` is the artist that made the album
+- `discnumber` is the disc number of the music piece in the album
+- `genre` is the genre of the music piece
+- `totaldiscs` is the amount of discs of the album
+- `totaltracks` is the amount of tracks in the disc of the music piece
+- `front` is an image of the front cover
+- `performer` is only used in classical music and defines the artist that
+  played the piece.