Playing and Organizing Music Files
Kubuntu does not directly support the MP3 format, because it is restricted by patents and proprietary rights. Instead Kubuntu supports the Ogg Vorbis format out of the box, a completely free, open and non-patented format. Ogg Vorbis files also sound better then MP3 files of the same file size and are supported by many popular music players (a list of players is here).
You can still play your old MP3 files by installing MP3 support (see the section called "Multimedia Codecs"). Instructions for other formats, such as Windows Media Audio (wma/wmv) and other patent encumbered formats can be found on the Ubuntu Wiki.
The default music application on your Kubuntu system is the AmaroK Music Player, a music management and playback application that looks like iTunes. When you first start AmaroK, it will scan your home directory for any supported music files you have and add it to the database. To start AmaroK, choose K-Menu->Multimedia->AmaroK (Audio Player).
AmaroK has an inbuilt ID3 tag editor that can edit the metadata on your OGG and other music files. Please see the amaroK handbook (Offline Help) for details on how to edit the metadata.
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