Devlog: The Button’s in-browser demo

The Button’s page has a live demo: you load your own audio, press the button, and A/B the result right in the browser. A few people asked how it works, so here’s the short version.

It runs entirely in your browser. Nothing uploads. The demo uses the Web Audio API — the audio engine built into every modern browser — to run a small version of the plugin’s chain: a rumble filter, a gentle low shelf, a presence lift, soft saturation and light compression. The full plugin does more (it analyzes the material and adapts), but the demo is a fair taste of the direction.

The part I care most about: the A/B is loudness-matched. Processed audio almost always comes out a bit louder, and louder always wins a comparison — that’s the oldest trick in the plugin business. So before the demo lets you listen, it renders the processed version silently, measures both versions, and matches their levels. When you A/B, you’re comparing sound, not volume. If the demo convinces you, it convinced you fairly.

The installable plugin (VST3/AU) is in the final stretch. The free Lite version comes first — list subscribers get it before anyone else. In the meantime, the demo is on The Button’s page, and the rest of the free stuff lives at /free/.