Open Source C MIDI Software

TiMidity++ is an open source MIDI to WAVE converter and player.

Firmware loaders for M-Audio/Midiman USB MIDI and Audio devices

The Pure Data (short Pd) project on SourceForge unifies the extensions (or externals) written for the Pure Data Graphical Computer Music System written by Miller Puckette with contributions from many others.

A real-time software synthesizer based on the SoundFont 2 specifications. It can be used for live audio synthesis of MIDI events or for rendering MIDI files to disk, using SoundFont instruments. It can also be embedded in other applications. This is not a application with a graphical user interface, however there are several GUI applications which utilize FluidSynth.

Bristol is synth emulation package for a diverse range of vintage synthesisers, electric pianos and organs. The application consists of a multithreaded audio synthesizer and a user interface called brighton.

PortMedia was created to develop and share cross-platform, open-source I/O libraries for digital media including MIDI, video, and audio. Only a few things were released under the PortMedia umbrella. These are now hosted by the github.com/Portmidi/ project, where you can find the lastest versions of PortMidi, portsmf (Standard MIDI File support and more), and see github.com/rbdannenberg/scorealign for MIDI and/or Audio score alignment.

A cross-platform patch editor for the E-MU Proteus 2000 sample-based synthesizer family. prodatum is free software.

BackupBand is a music auto-arranger. It has a virtual drummer, bassist, and rhythm guitarist. These 3 "musicians" follow your chord changes live (as you play some MIDI instrument, such as a keyboard) and they play along with you in perfect time. It's like having a live rhythm section backing you up. The rhythm section knows how to play in 60 different styles such as Rock, Disco, HipHop, Heavy Metal, Reggae, Swing, various latin styles, etc. You can also create your own styles for them to play. The bassist plays a rickenbacker, fender precision, synth, and double (acoustic) bass. The guitarist plays a les paul, steel string, and nylon string. The drummer plays 6 kits. You can also create your own multi-sampled guitars, basses, and kits for them to play.

Basic structure for Android development

DSSI is an audio plugin API for software instruments (soft synths) and effects. It is based on the LADSPA plugin API, the ALSA sequencer event types, and OSC (Open Sound Control) communications with custom GUIs.

A featureful SID-music creation tool (tracker) for the Commodore 64. It includes many advanced effects and tools like keyboard-tracking, tempo-programs/funktempo, gateoff-table-pointers, filter-shift, SID-export, executable-export, MIDI/XM conversion and MIDI-input hardware, etc., etc. NOTE: I left SourceForge for reasons not ethical to mention here. You can find me and my further work at these locations: http://hermit.sidrip.com http://csdb.dk/scener/?id=18806 https://github.com/hermitsoft/

ABC is a text-based music notation language. This project aims to promote the ABC music notation language by providing cross-platform, open-source tools for manipulating, displaying and playing (via MIDI) ABC files. This project is here for historic reasons and there is not too much activity now. The abcmidi project is updated more frequently.

Advanced GTK+ Sequencer is intended to use for music composition. It features a piano roll, as well a synth, matrix editor, drum machine, soundfont2 player, mixer and an output panel. It's designed to be highly configurable, you may add effects to its effect chain, add or remove audio channels/pads. You may set up a fully functional network of engines, therefore exists a link editor for linking audio lines. In conjunction with ags you need a realtime kernel and alsa support. `ags` uses conditional locks to keep several threads in sync that's why you need at least a preemptible kernel.

Gmorgan is a midi processor. It can be voiced using Linux synths, midi connected equipment, or a soundcard. It is best to use a velocity sensing midi keyboard so that the first 4 voices can be mixed or layered. Demo at Youtube: http://youtu.be/3uIRq6M1tCs For GNU/Linux users, the latest file is .79. GMorgan .79 runs well on Ubuntu and most Linux/GNU distributions. Although it is included in the tarball, you can download .75 pdf documentation from the files section here. This revision incorporates a new drum pattern panel based on the FLTK spreadsheet example. There is also some miscellaneous cleanup. If you have tried it before, be sure to go to Settings->global, renew the file paths to the current gmorgan directory, and save them. The sound file has been slightly reformated, so results could be unpredictable if you don't do this. Try the play along at http://www.seconnecticut.com/GmorganPlayalong.htm

TiMidity++ Windows Synthesizer (TWSYNTH) extended TiMidity++ to read midi inputs. CAUTION !! TWSYNTH proj. is obsolute. TWSYNTH sources are sucessfully included Timidity++. see http://sourceforge.net/projects/timidity

jack-keyboard is a virtual MIDI keyboard - a program that allows you to send JACK MIDI events (play ;-) using your PC keyboard. It's BSD-licensed. User interface is GTK-based.

A SoundFont editor and other software for editing, managing and sharing sample based MIDI instrument files for computer music composition. Support for other formats is planned.

The No Budget Orchestra Plugins are a collection of virtual (software) musical instruments. comprising a full, classical orchestra There are flute, piccolo, oboe, bassoon, clarinet, violin, viola, cello, contrabass, trumpet, trombone, tuba, french horn, and various percussion sections. The various sections include articulations. For example, the violin section can play legato, pizzicato, staccato, and tremulo. There are subgroups as well, for example Violins I and II. The plugins are in LV2 (Linux) format for use in Ardour, Muse, QTractoor, etc. They are available in 2 formats; a collection of LV2 plugins, and a collection of linux executables. The plugins can be loaded into a host program such as Ardour, Muse, QTractor, etc. The executables are standalone versions that contain both the samples, and the engine that plays them.

Jack-smf-utils is a set of two utilities - jack-smf-player and jack-smf-recorder - whose purpose is to play and record MIDI streams from/to Standard MIDI Files (i.e. the files with .mid extension) using JACK MIDI. It uses libsmf as a backend.

eChanter is an Open Source electronic bagpipe project, based on the Arduino platform, using capacitive touch sensors, with polyphonic wavetable synthesis PCM audio at 8KHz. See Files for the development version, eChanter v3.0.

LibSMF is a BSD-licensed C library for handling SMF ("*.mid") files. It transparently handles conversions between time and pulses, tempo map handling etc. The only dependencies are C compiler and glib. Full API documentation and examples are included. Note that the development has moved to https://github.com/nilsgey/libsmf.

Cyclone is a powerful music application that handles loops in live context, full MIDI controllable. Goal: to make an app that can compete with Ableton Live in loop handling power. Cyclone works good in realtime Jack environments.

Mutabor is a Program that allows performing and composing microtonal music using a normal MIDI keybord. But it's powerful description language is intended to allow permanent retunings and tuning logics in to describ, what's actually goes on.

This project is to create an updated version of abc2midi, a tool to generate MIDI files from abc music notation. As well as improving the code, the intention is to integrate features from and improve compatibilty with the abc 2.2 standard.

libTiMidity is a MIDI to WAVE converter library that uses Gravis Ultrasound-compatible patch files to generate digital audio data from General MIDI files. This library based on the TiMidity decoder from SDL_sound library.