dancer.js is a high-level audio API, usable with both Mozilla's Audio Data API and Webkit's Web Audio API with flash fallback, designed to make sweet visualizations.
jsmad is a pure javascript MP3 decoder, based on libmad, with an ID3 decoder written from scratch.
Javascript MPEG-1 Audio Layer III (mp3) and ID3v2 decoder
HTML5 <video> and <audio> made easy.
One file. Any browser. Same UI.
This is a javascript library (with frontend) for sound effect generation.
This is a program for stretching the audio. It is suitable only for extreme sound stretching of the audio (like 50x) and for applying special effects by "spectral smoothing" the sounds. It can transform any sound/music to a texture. The program is Open-Source and it's released under the version 2 of the General Public License. You can download the source code for Linux or the Windows binaries.
Freesound is a collaborative database of Creative Commons Licensed sounds. Browse, download and share sounds.
A place to put your favorite song of the moment & hear great music, handpicked every day by friends.
SoundCloud lets you move music fast & easy. The platform takes the daily hassle out of receiving, sending & distributing music for artists, record labels & other music professionals.
Audio experiment
Using HTML5 and Flash, SoundManager 2 provides reliable cross-platform audio under a single JavaScript API.
Audiotool is a powerful online music production studio right in your browser.
A C-Based Audio Programming Language
SuperCollider is an environment and programming language for real time audio synthesis and algorithmic composition. It provides an interpreted object-oriented language which functions as a network client to a state of the art, realtime sound synthesis server.
Pure Data (aka Pd) is an open source visual programming language. Pd enables musicians, visual artists, performers, researchers, and developers to create software graphically, without writing lines of code. Pd is used to process and generate sound, video, 2D/3D graphics, and interface sensors, input devices, and MIDI. Pd can easily work over local and remote networks to integrate wearable technology, motor systems, lighting rigs, and other equipment. Pd is suitable for learning basic multimedia processing and visual programming methods as well as for realizing complex systems for large-scale projects.
Puredyne is the USB-bootable GNU/Linux operating system for creative multimedia.
VST Plugins Free - Virtual instruments and effects
Opentape is a free, open-source package that lets you make and host your own mixtapes on the web.
Upload songs (via web or FTP), reorder, rename, customize the style, and share what you like on other sites with an embeddable player.
Audacity est un logiciel libre, gratuit et multi-plateforme pour l'enregistrement et l'édition de sons.