docs: fix README badge links and header layout

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: AMDphreak

.gitignore

@@ -42,7 +42,7 @@ core/multimux-core.pdb
 !.github/**
 
 # Allow documentation & website
-!README.adoc
+!README.md
 !CHANGELOG.adoc
 !changelog-details/**
 !docs/**

README.adoc

@@ -0,0 +1,155 @@
+<a id="readme-top"></a>
+<div align="center">
+  <a href="https://github.com/AMDphreak/multimux/graphs/contributors"><img src="https://img.shields.io/github/contributors/AMDphreak/multimux.svg?style=for-the-badge" alt="Contributors"></a>
+  <a href="https://github.com/AMDphreak/multimux/network/members"><img src="https://img.shields.io/github/forks/AMDphreak/multimux.svg?style=for-the-badge" alt="Forks"></a>
+  <a href="https://github.com/AMDphreak/multimux/stargazers"><img src="https://img.shields.io/github/stars/AMDphreak/multimux.svg?style=for-the-badge" alt="Stargazers"></a>
+  <a href="https://github.com/AMDphreak/multimux/issues"><img src="https://img.shields.io/github/issues/AMDphreak/multimux.svg?style=for-the-badge" alt="Issues"></a>
+
+  <h1>multimux: Master Audio Mixdown Suite</h1>
+  <p>A lightweight, cross-platform desktop app (Electron, SolidJS, TypeScript) to visually mix multiple discrete audio tracks from a recording into one master track while preserving video bit-for-bit (<code>-c:v copy</code>).</p>
+  <p>
+    <a href="https://github.com/AMDphreak/multimux/issues">Report Bug</a>
+    &middot;
+    <a href="https://github.com/AMDphreak/multimux/issues">Request Feature</a>
+  </p>
+
+  <img src="resources/icon.png" alt="multimux Logo" width="128" height="128" />
+</div>
+
+<details>
+  <summary>Table of Contents</summary>
+  <ol>
+    <li>
+      <a href="#about-the-project">About The Project</a>
+      <ul>
+        <li><a href="#built-with">Built With</a></li>
+      </ul>
+    </li>
+    <li><a href="#getting-started">Getting Started</a></li>
+    <li><a href="#usage">Usage</a></li>
+    <li><a href="#explanation">Explanation</a></li>
+    <li><a href="#changelog">Changelog</a></li>
+    <li><a href="#contributing">Contributing</a></li>
+    <li><a href="#contact">Contact</a></li>
+  </ol>
+</details>
+
+## About The Project
+
+Screen-recording apps often capture mic, game, and chat on separate tracks. Players usually only hear track 1. multimux mixes selected tracks with FFmpeg `amix` while copying the video stream losslessly.
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+### Built With
+
+* **Desktop** — [![Electron][Electron.com]][Electron-url]
+  * [![SolidJS][SolidJS.dev]][SolidJS-url]
+  * [![TypeScript][TypeScript.com]][TypeScript-url]
+* **Media** — [![FFmpeg][FFmpeg.org]][FFmpeg-url] / FFprobe
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+## Getting Started
+
+### Prerequisites
+
+* Windows 10/11, macOS, or Linux
+* `ffmpeg` and `ffprobe` on PATH
+* Node.js + pnpm
+
+### Installation
+
+```bash
+pnpm install
+pnpm run dev
+```
+
+Use `F12` for the developer console if needed.
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+## Usage
+
+### First mixdown
+
+1. Launch multimux.
+2. Drag a recording onto the **Inlet Port**.
+3. Toggle channels and adjust faders.
+4. Click **Mix & Mux Master**.
+5. Open the output from the completion overlay.
+
+### Volume (dB)
+
+* Drag faders up to `+6.0 dB` or down to mute.
+* Double-click a fader to reset to `0.0 dB`.
+
+### Codecs
+
+Under *Output Mux Specs*, choose **AAC** or **OPUS** and a bitrate (128k–320k).
+
+### Silent video
+
+Mute all channels, then mix — multimux uses FFmpeg `-an`.
+
+### Build scripts
+
+* `pnpm run dev` — hot-reload development
+* `pnpm run build` — compile assets
+* `pnpm run build:win` — Windows installer under `dist/`
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+## Explanation
+
+Unlike full re-encodes, multimux:
+
+1. **Video stream copy (`-c:v copy`)** — lossless, fast container remux of video packets.
+2. **Audio mixdown (`amix`)** — decode selected tracks, apply volume, mix, encode one stereo master.
+
+Example filter graph (CH1 at 1.0, CH3 at 1.5):
+
+```text
+[0:a:0]volume=1.0[a0]; [0:a:2]volume=1.5[a2]; [a0][a2]amix=inputs=2:duration=longest:dropout_transition=0[a]
+```
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+## Changelog
+
+See [CHANGELOG.adoc](CHANGELOG.adoc).
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+## Contributing
+
+Fork, branch, and open a pull request.
+
+### Top contributors
+
+<a href="https://github.com/AMDphreak/multimux/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=AMDphreak/multimux" alt="contributors" />
+</a>
+
+For per-person profile links, prefer [all-contributors](https://allcontributors.org/).
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+## Contact
+
+Ryan Johnson — [@amdphreak](https://twitter.com/amdphreak)
+
+Project Link: [https://github.com/AMDphreak/multimux](https://github.com/AMDphreak/multimux)
+
+Site: [https://ryanjohnson.dev](https://ryanjohnson.dev)
+
+<p align="right">(<a href="#readme-top">back to top</a>)</p>
+
+<!-- MARKDOWN LINKS & IMAGES -->
+[Electron.com]: https://img.shields.io/badge/Electron-191970?style=for-the-badge&logo=Electron&logoColor=white
+[Electron-url]: https://www.electronjs.org/
+[SolidJS.dev]: https://img.shields.io/badge/SolidJS-2C4F7C?style=for-the-badge&logo=solid&logoColor=white
+[SolidJS-url]: https://www.solidjs.com/
+[TypeScript.com]: https://img.shields.io/badge/TypeScript-007ACC?style=for-the-badge&logo=typescript&logoColor=white
+[TypeScript-url]: https://www.typescriptlang.org/
+[FFmpeg.org]: https://img.shields.io/badge/FFmpeg-007808?style=for-the-badge&logo=ffmpeg&logoColor=white
+[FFmpeg-url]: https://ffmpeg.org/