The ALSA MIDI Filter application consists of a main script, named midifilter, and supporting Perl modules, configuration files, and documentation. It runs as an ALSA MIDI client that can receive input from a source (such as a MIDI keyboard connected to the computer), perform various filtering and other functionality based on the type and content of the MIDI input, and send the result to one or more other MIDI clients.
netjukebox is a Web-based media jukebox for MPD, VideoLAN, and Winamp/httpQ. It features realtime MP3 streaming from different audio formats. Users can download single tracks or a whole album in one zip file. It is also possible to batch-transcode the whole music collection to another format or bitrate without touching the original files.
AeonWave Audio-FX is real-time, hardware accelerated, cross platform audio effects software for guitar players, singers, vocalists, voice overs, or DJs. Originally designed as an audio effects applet for instrumentalists, it now extends to areas like voice processing for vocalists or live or podcasting DJ work. Effects include Compressor, Phaser, Flanger or Chorus, Wah, Distortion, and Reverb with echo.
trx is a toolset for broadcasting live audio from Linux. It sends and receives encoded audio over IP networks, via a soundcard or audio interface, and can be used for point-to-point audio links or multicast (e.g., private transmitter links or audio distribution). High-quality wideband audio (such as music) can be sent with low latency and fast recovery from dropouts.
pyscmpd is a music player daemon designed for use on Raspberry Pis. It implements a subset of the MPD protocol, but instead of serving local MP3 files, it connects to SoundCloud.com and serves the streams found there. It supports a huge number of front-end clients through MPD, including ncmpcpp and Sonata. It allows you to configure which parts of SoundCloud are made available for browsing by defining categories and adding groups or users to them.