I'm a product design student. I'm not familiar with the terminal or writing code. Please build this for me with HTML, CSS, JavaScript and native Web Audio. Make a simple, usable browser page, with no external libraries or internet services. Sound should start only after I click. Use comfortable initial levels. I need to play with the result, not read code. Make an interface alternative for the completed soundscape. Keep the same audio engine and capabilities. This version is a sound desk: visible vertical channel controls, source types, events and processing, so I can see and adjust the composition at a glance. Keep play/stop, environment, scenes and timer easy to find. It should be a usable instrument, not a debugging page. Keep every capability reachable and preserve the previous app.