browser-synth-builder

Build a complete, runnable, playable browser-based synthesizer ("VST-style synth in the browser") from requests like "make me a playable VST synth", "build a synthesizer with a working keyboard", "create a web instrument / playable piano / Web Audio synth", or any ask for a sound-producing music instrument page with a modern instrument design. Use when the deliverable must produce sound immediately in a browser preview without a DAW, plugins, or installation. Covers Web Audio implementation, onscreen keyboards with touch/mouse/computer-keyboard input, sound controls, and polished instrument UI. Not for native/DAW plugin development (VST3/AU), MIDI hardware integrations, or DAW host compatibility.