Open Source C++ Sound Synthesis Software

Text to Speech engine for English and many other languages. Compact size with clear but artificial pronunciation. Available as a command-line program with many options, a shared library for Linux, and a Windows SAPI5 version.

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.

eGuideDog project develops free software for the blind. Currently, we focus on WebSpeech, Ekho TTS and WebAnywhere.

A multi-platform software synthesiser emulating (somewhat inaccurately) pre-GM MIDI devices such as the Roland MT-32, CM-32L, CM-64 and LAPC-I. In no way endorsed by or affiliated with Roland Corp. Source hosted at: http://www.github.com/munt/

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 software synthesizer for Linux, originally forked from ZynAddSubFX (Copyright 2002-2009 Nasca Octavian Paul) in 2009 by Alan Calvert. Initially, Yoshimi delivered the same synthesizer capabilities. After early improvement of Jack and Alsa midi/audio performance, now many new features have been added, and we are concentrating on accessibility. Yoshimi comes with a built-in User Guide, and there is also a highly detailed Advanced Reference Manual under continuous development: https://github.com/ahlstromcj/yoshimi-doc

ZynAddSubFX is a powerful realtime, multi-timbral software synthesizer for Linux, OSX, and Windows. It is microtonal, and the instruments made by it sounds like those from professional keyboards. The program has effects like Reverb, Echo, Chorus, Phaser...

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.

AlsaModularSynth is a MIDI controlled realtime modular synthesizer and effect processor with support for LADSPA and JACK.

Qsynth is a fluidsynth GUI front-end application, written in C++ around the Qt framework, using Qt Designer. Eventually it may evolve into a softsynth management application allowing the user to control and manage a variety of command line softsynths.

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.

samplv1 is an old-school all-digital polyphonic sampler synthesizer with stereo fx.

30 modules, 300+ Synthedit prefabs ranging from subcontrol circuits to synths, fsu effects, drum sequencers, near complete copy/paste/save/load system for xox style patterns. 2 complete vst effects, and one vst synth.

Nyquist is a language for sound synthesis and music composition. It is implemented in C and C++ and runs on Win32, OSX, and Linux. Nyquist combines a powerful functional programming style with efficient signal-processing primitives. Nyquist is also embedded as a scripting language in Audacity.

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.

Free open source GPL metronome (a "branch" of "Weird Metronome") for Windows, Windows Mobile, & Pocket PC. Uses user-definable multi-voice WAV or MIDI (PC only) sounds for the beats. Has a blinker & allows user defined bpm & fine measure control.

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

an old-school drum-kit sampler with stereo fx.

This software integrates a small, specialized synthesizer and vocal processor. It can be used to learn Byzantine Church singing. You can play from the keyboard, mouse or touch screen. MIDI input is also available. Voice functions include: pitch highlighting, synthesizer control by voice, pitch correction and voice-to-ison conversion. On the screen there are labels with symbols of Byzantine notes. There is a metronome. The program is oriented on the Chrysanthos tuning of the diatonic scale: 9/8 - 12/11 - 88/81. The octave is divided into 17 (or 19) non-equal parts, it allows you to get all the Byzantine modes.

N.B. SuperCollider is now hosted at GitHub, and the most recent versions can be downloaded from there. http://supercollider.github.io A real time audio synthesis engine, and an object-oriented programming language specialised for music. SuperCollider was created in 1996 by James McCartney, now (since version 3) released as free software.

synthv1 is an old-school 4-oscillator subtractive polyphonic synthesizer with stereo fx.

padthv1 is an old-school polyphonic additive synthesizer with stereo fx, padthv1 is based on the PADsynth algorithm, by Paul Nasca, as a special variant of additive synthesis (cf. http://zynaddsubfx.sourceforge.net/doc/PADsynth/PADsynth.htm).

Libsidplayfp (and its console frontend sidplayfp) is a fork of sidplay2 born with the aim to improve the quality of emulating the 6581, 8580 chips and the surrounding C64 system in order to play SID music better.

Juno 6 is an VST based virtual Analogue Synthesizer for Windows written in C++, that emulates the sound technics of the original Roland Juno 6/60 Synthesizer. the project itself is based on the ultramaster juno 6 linux sources

MOLOSS (Multi Oscillator Linear Open Source Synthesizer) is a virtual synth, available as a VST plugin or standandalone exe, to build analog vintage sounds by combining several techniques used in the 80's. Its 4 voices mix Subtractive synthesis, additive synthesis, frequency (or actually phase) modulation, cross modulation, to allow a very wide sound range, with a lightweight CPU load. It has a default polyphony of 16 notes, and 2 mono "solo" modes. A lot of parameters can be modulated with MIDI controllers, to give the best live expressivity. It has a full embedded file-based preset management which reacts to MIDI program change messages. A Demo track can be heard here : https://soundcloud.com/arthelion/moloss-ii-demo-2023 Old MOLOSS I Demos : http://soundcloud.com/arthelion/moloss-i-demo https://soundcloud.com/arthelion/03-creepy-nightmare