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 a listening app that generates a simple warm chord and can also generate noise. Add a lo-fi chain: a filter, saturation with drive, and shallow tremolo with rate and depth. Let me bypass each stage and the whole chain. Keep comparison levels controlled so louder doesn't automatically sound better. Tremolo must move volume, not pitch or playback speed. Add a few useful settings from subtle warmth to an obviously worn texture. Make it pleasant enough to leave running.