GridSound is a work-in-progress open-source HTML5 Digital Audio Workstation based on the Web Audio technology. This project is compatible with any up to date modern browsers like : Chrome, Firefox, Safari and Edge soon yep Edge is compatible too! But we can not guarantee that each browser have implemented yet all the Web Audio API.
Obviously, there are still a lot of work and features to add to become a real DAW, but we have a good lightweight code base for the moment. Currently we are working on the undo/redo code part.
For the moment we are only two on the project and you are very welcome to contribute! Hope to see you on GitHub!
PS: to test the application you can follow these few steps :)