Open Source C++ Music Composition Software

The MIDI sequencer that features a rich understanding of music notation along with basic support for digital audio

MuseScore is a free and open-source music notation software designed for composers, arrangers, educators, and musicians of all levels. It allows users to write, edit, and print professional-quality sheet music with no limitations or subscription fees. MuseScore Studio supports a wide range of instruments and ensembles, from solo piano and guitar to full orchestras and choirs. The software is easy to learn while still offering powerful tools for advanced notation and score layout. With support for MIDI input and formats like MusicXML and MIDI, MuseScore integrates smoothly with other music software and workflows. Built by a global open-source community, MuseScore continues to evolve through active development and community contributions. Support MuseScore at http://musescore.org/en/donate

Psycle is a Music tracker (like FastTracker 2 or Impulse Tracker) combined with plugin modularity. It supports its own plugin API, the VST2 plugin standard, and a tracker style sampler playback.

Rakarrack is a stereo digital effects processor for Linux with jack support. Standard line-up of nearly 40 effects modules include Equalizers, Reverbs, Echo, Flange, Chorus, Distortions, WahWah, Vocoder, and other filters and processing modules.

A free sound editor, DarkAudacity is the well known Audacity sound editor now with a darker more modern theme - and a few small tweaks. The audio engine underneath is the same audio engine. The same code powers it. Like Audacity it is completely free. It's not a cut down trial evaluation version. You can record and play sounds, edit sounds, apply audio effects and save what you create for ringtones, podcasts and more. DarkAudacity is Open Source, free for you to download and use on your PC. Audacity and DarkAudacity come from a community effort. Many people have contributed to the audio code. Because they are Open Source, anyone is allowed to read and modify the source code. DarkAudacity is a variation on the Audacity software, made possible because Audacity is Open Source.

MusE is a Qt based audio/midi sequencer with editing and recording capabilities for linux.

NOTE: This is a legacy sourceforge project. Please download the software from https://openmpt.org/ instead. The official code repository can now be found at https://source.openmpt.org/browse/openmpt/ OpenMPT is a Windows-based audio application used to produce music. The application was initially a private project developed by Olivier Lapicque and is a popular 'tracker' used by many musicians. OpenMPT is available as both a 32-bit and 64-bit application. For more information and downloads, see https://openmpt.org/ libopenmpt, a cross-platform module playback library, is based on the OpenMPT project. Up-to-date libopenmpt downloads and documentation can be found at https://lib.openmpt.org/

QMidiArp is a MIDI arpeggiator, phrase generator and controller LFO for ALSA and JACK. It can run multiple synchronized arpeggiators, LFOs and step sequencers. The modules are also available as LV2 plugins with Qt user interface. QMidiArp has been growing since june 2009 on top of Matthias Nagorni's original arp idea.

The SpatGRIS is a plugin (Mac AU/VST and VST Windows format) designed to compose multichannel space. It allows the user to spatialize the sound in 2D (up to 16 speakers) or in 3D (up to 128 speakers) under a dome of speakers (with the ServerGRIS, available here on SourceForge). SpatGRIS is a fusion of two former plugins by the GRIS: OctoGRIS and ZirkOSC with a lot of new features. SpatGRIS has been developed by the Groupe de Recherche en Immersion Spatiale (GRIS) directed by Robert Normandeau and based at the Faculty of Music at Université de Montréal. SpatGRIS and ServerGRIS are still available here but they are not supported anymore. They have been replaced by the duo ControlGRIS/SpatGRIS3 also available at SourceFORGE (August 2021) Have a look at the them: https://sourceforge.net/projects/spatgris3/

An opensource typesetting environment for editing and publishing Carnatic music books in Indian languages. Supports Phonetic Translation of notation & lyrics and uses CFugue Runtime to automatically generate MIDI song files from the music notation.

PsalticTools includes: • a set of utilities (plugins) for typing of Byzantine notes in parallel double notation (Byzantine and Western), based on MuseScore free music editor; • the PsalticHelper program for searching for formulas of Byzantine music in music books. • the UniPsaltica2 font with the characters of the musical Byzantine notation in Unicode.

OctoGRIS3 is a multichannel sound spatialization plug-in (up to 8 sources / 16 speakers) available in Audio Unit and VST formats for Mac and PC. The free and open-source plug-in allows movement of multichannel sound sources on a variable set of speakers. Modes of grouped movement and a trajectory system are provided for spatialization of stereo and multichannel sources. The development of OctoGRIS3 has ended on November 2016. It has been replaced by SpatGRIS which is a fusion of OctoGRIS and ZirkOSC: https://sourceforge.net/projects/spatgris/

Automatic music notation application for musicians and composers.

Compose chiptunes with text files! And make mp3 and wav files of your songs to share with the world :) The audio synthesizer engine comes with 10 channels (9 music + 1 drum). The retro "beep" sounds reminiscent of old video game consoles and vintage PCs will take you back to the 8-bit era. You can shape your sound with waveforms - square, sawtooth etc. - and add LFO, delay and volume envelopes. Enjoy the 80's-ish synth drums, also! Demo songs: https://www.youtube.com/watch?v=qB6FUTQ5Oz4&list=PLXBNhaAeM7Lxf7ysrFzYFwPYRZM1JCrZr SoundCloud: https://soundcloud.com/beepcomp Orfium: https://www.orfium.com/profile/beepcomp/ What your music composition will look like: https://sourceforge.net/p/beepcomp/code/ci/master/tree/userdata/ (Similar to MML) Your First Tutorial: http://hiromorozumi.com/beepcomp/learn.html User's Guide: http://hiromorozumi.com/beepcomp/documentation/beepcomp_users_guide.html

Midi sequencer based on old-style analogue devices with emphasis on live interaction and improvisation. For more info please start with the project Wiki: http://p.sf.net/ma2/ProjectWiki

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.

A C++ library and Python module for audio synthesis featuring dynamic digital filters. Nsound lets you easily shape waveforms and write to disk or plot them. Nsound aims to be as powerful as Csound but easy to use.

Takt is a text-based language for describing note and chord sequences as well as algorithmic compositon rules with C-like syntax. This software package contains a REPL (read-eval-play loop) interpreter for Takt, a MIDI-file-to-Takt translator, and an Emacs interface program which enables note entry from a MIDI keyboard.

The OpenOctave MIDI and Audio sequencer.

Cross-platform audio loop slicer designed to create sliced loops from WAV, MP3, FLAC or AIFF files in seconds without a sequencer. Effects include filter sweeps, phasing, flanging, delay, and distortion.

A Collection of Useful C++ Classes for Digital Signal Processing This project has been moved to here: http://code.google.com/p/dspfilterscpp/

A graphic user interface program to work with abc notation

A program that builds the sounds of the chord from its name. The chord building rules are applied with the respect to the requirements of music theory. The user interface is based on the WT library (c++ web toolkit).

Csmusgen (Csound music generator), is a music generator based on the concept of musical series, not intended as in the integral serialism, but rather as a module in continuous stochastic evolving.

CULDAW means Collaborative Ubiquitous Digital Audio Workstation. The goal if this project is to build a tool for Symbian S60 devices to produce music with phones. It includes an step sequencer and a synthetizer.