ryzennth/idr-visualizer ? reverse-engineered prompt

Build me a real time audio spectrum visualizer that looks like a USD to IDR exchange rate screen, but for music. I want a clean web page where I can play audio and see the spectrum animate live using the browser audio API and canvas.

It should support different visual modes like bass, mid, full, wave, and a stronger max style, plus an option to flip the visual direction horizontally. I also want it to work with audio from YouTube and SoundCloud by using a simple backend proxy, so if I paste a link it can handle the stream and visualize it.

Make it feel polished and responsive, with the main focus on the visual effect and the rate style display. If you need to check current docs or best practices for streaming and audio handling, look them up online first.