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This toy project is the result of my first exploration into the realm of synthesized piano sounds. My goal was to get some hands-on experience with a respective "digital waveguide" based design and to learn a thing or two in the process.
The implementation is based on Balázs Bank's "Physics-Based Sound Synthesis of the Piano" (see http://home.mit.bme.hu/~bank/thesis/pianomod.pdf) and the various papers that are cross referenced in that thesis (see respective references in the code comments).
You can use the above knobs to turn the piano into a bell tower (use "autoplay" so you can easily compare the effects). Known-Limitation: The used filters may crash with certain parameter combinations - when that happens just press reload.
The source code can be found here: https://github.com/wothke/webPiano