what OS are you using? It normally works without issues on Chrome. It can be hard on CPU so better have no other tabs open on your browser.
> Audio under load — reducing visuals.
and after another 30 seconds I started to get some sound, but it's not smooth. The sound also disappears from time to time, and then reappears after 15 seconds or so.
From the CPU blinking thing
> The audio thread is falling behind wall-clock, which usually means crackling. Try closing other tabs or apps, or disable heavy effects (shimmer, granular, plate).
It took a while but I found "shimmer" and "plate", and they are disabled (they are inside a brown rectangle instead of an orange one). I can't find "granular". I probably need a faster notebook.