Click Start. It opens a second window for the clean output feed (drag that one to a projector) and boots the engine on this window's control canvas. Then drop a video anywhere on this page, or choose one above. Anything this browser can play is baked to HAP right here in the tab; a long clip takes a while, and you can leave the tab while it does. A .mov already baked by vidiotic transcode skips the wait entirely. The result is kept in this browser, so a reload picks up where you left off. Listen points the audio-reactive effects at a tab, your system audio, or a microphone.