To play the Ogg and MP3's you will naturally need a player:
This player has most of the features as Winamp from Windows 95/98/NT but it will of course feature some specials only available for the Linux version.
Xaudio is a very fast and very robust multi platform solution for Digital Audio playback, especially targeted at MPEG Audio (MP1, MP2 and MP3) decoding.
AlsaPlayer is a new type of PCM player. It is heavily multi-threaded and tries to exercise the ALSA library and driver quite a bit. It has some very interesting features unique to Linux/Unix players. The goal is to create a fully pluggable framework for playback of all sorts of media with the focus on PCM audio data. Full speed (pitch) control, positive *and* negative! First Linux- and only GPL player that does this!! MP3's and CD's do varispeed :)
What is mpg123? It is a fast, free and portable MPEG audio player for Unix. It supports MPEG 1.0/2.0 layers 1, 2 and 3 (those famous "mp3" files), and it has been tested on a wide variety of platforms, including Linux, FreeBSD, NetBSD, SunOS, Solaris, IRIX, HP-UX and others. For full CD quality playback (44 kHz, 16 bit, stereo) a Pentium (or fast 486), SPARCstation10, DEC Alpha or similar CPU is required. Mono and/or reduced quality playback (22 kHz or 11 kHz) is even possible on slower 486 CPUs.
FreeAmp is an extensible, cross-platform audio player. It features an optimized version of the GPLed Xing MPEG decoder which makes it one of the fastest and best sounding players available. FreeAmp provides a number of the most common features users have come to expect in a clean, easy to use interface.
jOggplayer is an open source, platform-independant, graphical Ogg Vorbis player developed using Java. It features the usual basics needed to enjoy your files, including playing files from your hard drive or streaming from an URL, individual file play or multiple file looping play, sequential or random play, volume control that goes to 11, a visual song progress indicator, etc.
Squelch is a player dedicated to Ogg Vorbis. It features a sophisticated playlist manager and a Vorbis tag editor. Most popular output types are supported.