Open Source C++ MIDI Software

Hydrogen is an advanced drum machine for GNU/Linux, Windows and Mac OS X. It's main goal is to bring professional yet simple and intuitive pattern-based drum programming.

Editors for the BOSS GT-1, 3, 5, 6, 8, Pro, 10, 100, 001 Guitar Multi-Effects Processors, and the BOSS GT-1B,6B,10B Bass Multi-Effects Processors. And for the Katana Amplifier. and various Boss and Roland guitar synths. This software can visually edit parameters via Midi,USB, or Bluetooth(via external device on some units) on the Multi-Effects/Amp/Synth Processor.

Aria Maestosa is a midi sequencer/editor. It lets you compose, edit and play midi files with a few clicks in a user-friendly interface offering score, keyboard, guitar, drum and controller views. Git repository: https://github.com/ariamaestosa/ariamaestosa

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

Speedy MIDI is an editor designed for choirs and singers to quickly generate MIDI files for rehearsal.

CtrlrX based editor for Roland SUPER JD SYNTHESIZER MODULE JD-990

Polymeter is a MIDI sequencer for music that's in multiple prime meters (2, 3, 5, 7, 11, etc.) simultaneously. Each track has its own loop length, and when the lengths differ, the tracks "slip" (or shift phase) relative to each other. The resulting interference pattern is sufficiently intricate that variations similar to the embellishments of a live performer can be generated algorithmically. The current project is based on software I developed in the 1990s in order to compose polymeter-based electronic dance music. I'm rescuing from bit rot what might be (for all I know) the world's only sequencer optimized for polymeter. It's a long battle, but it's worth it to be able to compose complex polymeter again.

A win32 MIDI tracker being developed in C++ (MSVC6) using SDL. Interface is almost 1:1 clone of the popular Impulse Tracker DOS tracking software. Multiple out-devices, 64 midi tracks (expandable to 256), .mid export, parameter drawing, 96ppqn, and muc

A free and open sourced patch editor for the Yamaha FB01 sound module.

monstrumWaveXL or (mwaveXL) is a Lua based cross platform application which sends MIDI and sysex data to/from the Waldorf Microwave II/XT/XTk from either standalone mode or as a VST in your favorite DAW. This is not a software emulator of a Waldorf synth, it is an editor for the actual synth thus requires a Waldorf microwave (xt xtk or II) synthesizer.

TSE3 is a powerful third generation open source MIDI sequencer engine written in C++. It is a 'sequencer engine' because it provides the actual driving force elements of a sequencer but provides no form of fancy interface.

Aldrin is an open source modular music sequencer/tracker for the GNU/Linux operating system. Aldrin is currently in beta stage and fully functional. Feel free to try and use it.

Katmus is an application for manual music transcription. It features a score editor synchronized with a wave file, time stretching, project manager and lots of other features.

CheeseTronic is a set of professional-grade intended audio and music composition apps for unix & compatibles. consists of CheeseTracker(Impulse Tracker Clone), LegaSynth(Old Chip/Keyboard/Synth emu), Shake Tracker(MIDI Tracker), and Chionic (Sampler)

BUZZle means Buzz Logic Enhanced and has neither to to with Buzzle.com or the Buzzle-Game. BUZZle is a free (non-commercial) modular music composing and sequencing tool. It is a completely re-written version of the famous Jeskola Buzz.

Dino has moved to Savannah. The URL to the new project page is http://savannah.nongnu.org/projects/dino/

Free Clef is a lightweight notation editor which allows you to quickly write your songs and export them to MusicXML format. It lets you distribute interactive sheet music online, and to use score files with a wide variety of music software.

Editing software aid for use with the Primova GX-2 Gear Shifter device used with GK type hexaphonic guitar/bass processors. The editor will display and edit the internal functions of the Gear Shifter processor device via a USB port (serial over USB). Link to hardware unit site: https://www.primovasound.com/products/gx2/index.php/

JVTool is a graphical editing tool for Roland JV series keyboards. It is able to retrieve/send patches from/to the keyboard, as well as save/read them to/from files. It also provides a full-featured graphical environement to edit patches easily.

KGuitar is powerful KDE-based music tabulature editor with support of guitar, drums, classic note scores, MIDI synthesizer output, chord, scales, modes, melody and rhythm construction and analysis tools, lots of tab effects, Guitar Pro files import.

King-pro means "King is Not Guitar Pro". King-pro is a multitrack tablature editor for Linux/Win/MacOS.

Korale aims to be an open source alternative to the popular "Sibelius" sheet music notation software. It will be written portably and flexibly, and will use as intuitive an interface as we can design.

Software to allow hardsid card to act as a MIDI instrument running on a Linux platform. This project will use the existing hardsid driver for Linux (http://sourceforge.net/projects/hardsid). See also www.hardsid.com.

MC (Music Composer) will be a full digital home studio. It has a step-sequencer/piano roll, sampler, sound/midi recording/editing, full automation and full VST, LADSPA, JACK, REWIRE support (client+host). Includes top-notch VST plugins (the DGSS, Rev3D..)

Audio application emphasizing on orchestral music composition and film scoring.