GSI is an easy to use audio system which can be used over a network and which gives applications, through a very simple API, sample playing with stereo, 3D, doppler effects, music playing (MIDI, HMP, MUS), cd playing and ejecting/changing. GSI also contains a separately usable sound/music loading/saving/format conversion library libgsif (au/aiff/voc/wav/raw, midi/hmp/mus).
GStreamer is a library that allows the construction of graphs of media-handling components, ranging from simple Ogg/Vorbis playback to complex audio (mixing) and video (non-linear editing) processing. Applications can take advantage of advances in codec and filter technology transparently. Developers can add new codecs and filters by writing a simple plugin with a clean, generic interface.
Helix DNA Client
Helix DNA Client the media playback engine used by the RealOne Player. It contains standards-compliant H.263 and MP3 decoders, RealAudio and RealVideo binaries, and sample user interfaces.
Media Application Server: a network-transparent, platform-independent media solution. MAS provides an industry standard network transparent infrastructure for distributed, synchronized, time-dependent media data
The Network Audio System is a network transparent, client/server audio transport system. It can be described as the audio equivalent of an X server.
NetStreamer is a streaming application to be used over 24+ kbit/s networks, like LAN's and ISDN. At the moment there are a linux / x86 ELF binary version and a source version available, under the GNU General Public Licence. NetStreamer offers the possibility to distribute live Audio over network, like Music from internal CD-ROMs or a radio signal on the line-input of a PC.
Real Rekord is a KDE program which helps you record streams from Real Player using GNU/Linux. It lets you record realaudio/realplayer streams by using vsound 0.5 (sits between program and /dev/dsp) and sox (converts audio file formats).
rplay is a flexible network audio system that allows sounds to be played to and from local and remote Unix systems.
Shoutcast is a streaming audio system for Windows and Unix platforms. At the center of the system is the SHOUTcast Distributed Network Audio Server (DNAS). The DNAS is responsible for accepting a broadcast feed from Winamp and the SHOUTcast Source DSP plug-in, and repeating the broadcast to listeners connected to this SHOUTcast DNAS. Once your source content is being fed into the SHOUTcast DNAS, it will also list itself with the SHOUTcast directory so listeners can locate your broadcast.