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A neon audio utility that controls real Windows playback devices directly, auto-switches on game launch, and offers a global-hotkey HUD — a Tauri v2 + React + Rust reimplementation.

This is a Tauri-based native desktop rebuild of an earlier Python (CustomTkinter) prototype. Instead of Python/pycaw, the audio backend calls WASAPI / Core Audio COM directly from Rust via the windows crate, while the UI reproduces the same cyberpunk neon / glassmorphism design in React + TypeScript.

Floating HUD overlay shown on a device switch:

1. Real Windows audio control — enumerate render devices with IMMDeviceEnumerator, volume/mute via IAudioEndpointVolume, and switch the default device for both the Console and Communications roles through the undocumented COM interface IPolicyConfig::SetDefaultEndpoint.
2. Live peak meters — poll IAudioMeterInformation every 100 ms and visualize it as a neon gradient bar on each device card.
3. Global background hotkey — register an OS-level shortcut (default Ctrl+Shift+A) with tauri-plugin-global-shortcut to cycle the active device and show the HUD without stealing focus.
4. Game auto-routing engine — a sysinfo-based background thread scans processes every 2 seconds and auto-switches to the mapped device when a registered game launches.
5. Floating HUD overlay — a borderless, transparent, always-on-top window that fades in/out at the bottom-right.

glow-audio/
├─ src/                     # React + TypeScript frontend
│  ├─ App.tsx               # Main UI (Devices / Profiles / Settings tabs)
│  ├─ Hud.tsx               # Floating HUD overlay component
│  ├─ api.ts                # Typed wrappers around the Rust commands
│  ├─ main.tsx              # Routes main vs HUD via the ?view=hud query
│  └─ styles.css            # Neon / glassmorphism theme
└─ src-tauri/               # Rust backend
   └─ src/
      ├─ audio.rs           # WASAPI/COM audio engine + IPolicyConfig definition
      ├─ monitor.rs         # Process monitor + auto-routing thread
      └─ lib.rs             # Commands, global hotkey, HUD, settings persistence

Settings and profiles are stored in the OS app-config directory (%APPDATA%\com.kernullist.glowaudio\) as glow_settings.json / glow_profiles.json.

• Node.js + npm
• Rust (stable, MSVC target) + Visual Studio C++ Build Tools
• WebView2 runtime (bundled with Windows 11)

npm install            # frontend dependencies
npm run tauri dev      # dev mode (HMR + Rust hot-rebuild)
npm run tauri build    # release build (standalone exe + installers)

⚠️ During development, always launch with npm run tauri dev. Running the debug exe (src-tauri/target/debug/glow-audio.exe) on its own fails to reach the Vite dev server (localhost:1420) and shows a connection-refused page. To get a double-clickable standalone executable, build it with tauri build (see the script below).

A PowerShell script that handles the cargo PATH, checks prerequisites, and prints the produced artifact paths.

.\build.ps1              # full build: standalone exe + installers (msi/nsis)
.\build.ps1 -NoBundle    # standalone exe only (skip installers, faster)
.\build.ps1 -SkipInstall # skip npm install

Artifacts:

• Standalone exe: src-tauri/target/release/glow-audio.exe
• Installers: src-tauri/target/release/bundle/{msi,nsis}/

npm aliases are also available: npm run app:build (full), npm run app:exe (exe only), npm run app:dev (dev).

• Default global hotkey: Ctrl+Shift+A — cycle the active device + show the HUD popup.
• Changeable in the Global Settings tab using a format like Ctrl+Alt+S (modifier + key, joined by +).