validation: Windows VB-CABLE remediation

.github/workflows/ci.yml

@@ -56,3 +56,44 @@ jobs:
 
       - name: Svelte / TypeScript check
         run: bun run check
+
+  windows:
+    runs-on: windows-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: '3.5'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache cargo build
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+
+      - name: Install JS deps
+        run: bun install --frozen-lockfile
+
+      - name: Cargo test
+        working-directory: src-tauri
+        run: cargo test
+
+      - name: TS-RS bindings up to date
+        run: git diff --exit-code -- src/lib/modules/pipeline/generated
+
+      - name: Build Windows application
+        working-directory: src-tauri
+        run: cargo build --bin splitwave
+
+      - name: Svelte / TypeScript check
+        run: bun run check
+
+      - name: Build unsigned NSIS installer
+        run: bun run tauri build --bundles nsis --no-sign

NOTICE

@@ -146,7 +146,27 @@ licenses and are not distributed with Splitwave.
 
 
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
-7. Dependency License Gating
+7. VB-Audio VB-CABLE (Windows virtual microphone)
+-----------------------------------------------
+
+On Windows, Splitwave can install and manage the standard VB-CABLE virtual
+audio driver from VB-Audio Software. VB-CABLE is a third-party donationware
+component; it is not developed by Splitwave and is not covered by Splitwave's
+MIT license.
+
+  VB-CABLE origin:     https://www.vb-cable.com
+  VB-CABLE information: https://vb-audio.com/Cable/
+  Licensing terms:     https://vb-audio.com/Services/licensing.htm
+
+Splitwave downloads only the standard VB-CABLE package from VB-Audio's official
+HTTPS host after an explicit user action. The user-facing setup identifies
+VB-CABLE as donationware and provides the official information page. VB-Audio's
+licensing terms may require a separate distribution or volume license for
+professional deployments.
+
+
+-----------------------------------------------------------------
+8. Dependency License Gating
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 The Rust dependency tree is checked in CI with `cargo-deny` against
@@ -156,7 +176,7 @@ than reviewed after the fact.
 
 
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
-8. Other Notable Dependencies
+9. Other Notable Dependencies
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 The following components are used under permissive licenses

README.md

@@ -43,7 +43,16 @@ Requires Windows 10 version 2004 or newer (for per-app capture) and the
 (preinstalled on current Windows 10/11). Download the `.exe` installer from
 [Releases](https://github.com/Horuse/Splitwave/releases/latest) and run it.
 
-Virtual audio devices are not available on Windows.
+To expose a Splitwave output as a microphone:
+
+1. Open **Virtual devices** and choose **Install virtual microphone**.
+2. Complete the VB-CABLE installer.
+3. Restart Windows if Splitwave shows **Restart required**.
+4. Select `CABLE Input` in a Speaker node.
+5. Select `CABLE Output` as the microphone in the target app.
+
+VB-CABLE is third-party donationware; see its
+[official page](https://vb-audio.com/Cable/) for licensing and support.
 
 ## Platform support
 
@@ -56,7 +65,7 @@ Virtual audio devices are not available on Windows.
 | Device volume control                     |          ✅          |           ✅           |                ✅                 |
 | Recording: WAV / FLAC / AIFF / MP3 / Opus |          ✅          |           ✅           |                ✅                 |
 | Recording: AAC (M4A)                      |          ✅          |           ❌           |                ❌                 |
-| Virtual audio devices                     | ✅ AudioServerPlugin | ✅ PipeWire null-sinks |  ❌ (no user-mode driver model)   |
+| Virtual audio devices                     | ✅ AudioServerPlugin | ✅ PipeWire null-sinks |   ✅ fixed VB-CABLE microphone    |
 | Effects, metering, file playback          |          ✅          |           ✅           |                ✅                 |
 | CLAP plugins                              |          ✅          |           ✅           |                ✅                 |
 | VST3 plugins                              |          ✅          |         ✅ X11         |                ✅                 |
@@ -80,14 +89,14 @@ Virtual audio devices are not available on Windows.
   VST3 defines no Wayland embedding
 - **Presets & templates:** shared effect presets with factory defaults, plus
   ready-made pipeline templates in the create flow
-- **Virtual devices:** create named virtual audio devices that appear system-wide.
-  Use them to capture loopback audio from any app or to feed processed audio into
-  apps that accept a microphone input (DAWs, Discord, etc.)
+- **Virtual devices:** create named virtual audio devices that appear system-wide
+  on macOS and Linux. Windows uses the single fixed VB-Audio VB-CABLE pair as a
+  managed virtual microphone; it does not provide arbitrary named Windows devices.
 
 System and per-app capture use **ScreenCaptureKit** on macOS, **PipeWire** on
 Linux, and **WASAPI loopback** / the **Process Loopback API** on Windows. Virtual
-devices are AudioServerPlugin drivers on macOS and PipeWire null-sinks on Linux;
-Windows has no user-mode virtual-device model, so they are unavailable there.
+devices are AudioServerPlugin drivers on macOS and PipeWire null-sinks on Linux.
+Windows uses VB-Audio VB-CABLE through the existing WASAPI output path.
 
 ## Stack