n8python/claude-recital

claude-recital is a browser-based demo that generates original piano music using a small AI model, then shows a 3D avatar performing it live as if at a recital. Everything, including running the AI model itself, happens directly in your web browser using WebGPU, a technology that lets browsers use your graphics card for heavy computation, rather than sending anything to a server. The model behind the music is a 50 million parameter neural network that predicts music one raw byte at a time, which is a fairly small model by AI standards, built and run using hand-written low-level graphics code instead of any existing AI inference library. It was trained to remember long musical passages and uses several tricks, such as compressing its weights and processing tokens in the fewest steps possible, to run quickly on a graphics card inside a browser tab. There is also a classic view of the demo that shows live sheet music with a moving playhead you can click to jump to different points in the piece. To try it yourself, you serve the folder over a simple local web server and open it in a WebGPU-capable browser, with Chrome on Apple Silicon Macs specifically recommended for the best experience. The README is careful about licensing. The musical compositions used for training are in the public domain, but some of the recorded performance data used to teach the model its style comes from datasets with their own restrictive licenses, including a non-commercial one from Google Magenta. Because of this, the authors describe the whole project, meaning the trained model and the demo built around it, as a non-commercial research demo rather than something meant for commercial use. The piano sound samples and the three.js graphics library used for the 3D avatar carry their own separate open licenses.