Given a chord progression and a music style, JChordBox generates a song. It is a library tool that can generate backing tracks from a chord progression and a music style. It contains several command line processes detailed in the user guide. It also contains a MIDI song player that can loop, play, pause, stop, rewind, forward, mute, or solo tracks, display transport information, and much more. It runs in a terminal.
hexter is a software synthesizer that models the sound generation of a Yamaha DX7 synthesizer. It can easily load most DX7 patch bank files, edit those patches via a built-in editor or MIDI sys-ex messages, and recreate the sound of the DX7 with greater accuracy than any previous open source emulation (that the author is aware of). It operates as a plugin for the DSSI Soft Synth Interface.
Desfonema Sequencer is a tracker-inspired MIDI sequencer. It uses a pattern oriented design, with n tracks by pattern. It offers a piano roll editor for tracks, and a tabbed track interface for patterns. It features convenient keyboard shortcuts, a virtual keyboard, step and live editing, MIDI input (ALSA), and a text-based file format that is easy to edit manually or merge and better suited for version systems like Subversion.
AdlMIDI is a command line program that plays MIDI files using software OPL3 emulation (FM synthesis). It has a console UI. It features a built-in selection of 50 patch sets, most of which are General MIDI compatible, but some of which are customized for playing original background music soundtracks of select PC games.
n-Track Studio is an audio and MIDI multitrack recorder that turns your computer into a full-fledged recording studio. You can record and playback a virtually unlimited number of audio and MIDI tracks. The program supports simultaneous recording from multiple 16-bit and 24-bit soundcards, and real-time audio effects can be applied non-destructively to each track. Built-in effects include Reverb, Multiband Compression, Chorus, Delay, Pitch Shift, Graphic and Parametric EQ, and spectrum analyzer. The program can use third party VST plug-ins to process audio signals in real-time. Effects can also be used to process the recorded signal in real-time. MIDI tracks can be imported end exported to regular MIDI files, and edited using the built in piano-roll based MIDI editing window. The program supports VSTi instrument plug-ins for sample accurate software MIDI playback. Volume and pan evolution can be programmed by drawing on the timeline window.
Scenic is a free software suite for streaming audio, video, and MIDI between live events. It was created at the Society for Arts and Technology (SAT) to give artists a powerful tool for telepresence in live arts contexts, and new media installations. The streaming is done over RTP with the GStreamer multimedia framework. Users can also choose low-bandwidth or high-quality codecs, depending on what is available on their system. It offers up to as many audio channels as your audio device supports. It consists of a desktop application and several command-line utilities: scenic (a Desktop application to stream audio, video, and MIDI over RTP); milhouse (streams audio and video over RTP); midistream (streams MIDI notes and controls over RTP); dc-ctl (controls connected DC IEEE 1394 cameras); firereset (resets an IEEE 1394 bus to help in case of problems); and jack-info (prints information about running JACK servers).