Open Source C MIDI Software for FreeBSD

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.

General Sound Interface (GSI). This is a sound interface capable of controlling every detail of sound playing. It can use the following interfaces: OSS, Ultrasound (Linux 2.0.x & 2.1.x), FreeBSD (pcm), and generic /dev/audio.

Playmidi is a web and curses and SDL-based MIDI file player for Linux and MacOS and Chrome (via Web MIDI and Web Audio apis). All recent development has moved to https://github.com/nlaredo/playmidi It supports software rendering of midi files via SDL audio and can also output midi events to external midi devices (in time with SDL audio soft synth) via both alsa sequencer api (linux) and coremidi api (osx). Math-based synthesis (when no sf2 is loaded and no external midi output is set) is planned to evolve over time to support most of the features found in a minimoog voyager, and wavetable based sf2 support is expected to evolve to properly emulate all the features of a roland sc88 (but not there yet). Not all sf2 files are yet fully supported, but currently most development in the git tree has happened with one you can find via google search called Scc1t2.sf2. It provides a good starting point for those without external midi hardware

The project is about porting selected (open source) music-, and audio software to latest compilers and platforms...