Rebrand to ScreenSound (v2.0.0)

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           dotnet-version: '8.0.x'
 
       - name: Restore
-        run: dotnet restore AudioMonitorRouter.sln
+        run: dotnet restore ScreenSound.sln
 
       - name: Build
-        run: dotnet build AudioMonitorRouter.sln -c Release --no-restore
+        run: dotnet build ScreenSound.sln -c Release --no-restore

.github/workflows/release.yml

@@ -65,7 +65,7 @@ jobs:
           Write-Host "Building version $version (event=${{ github.event_name }})"
 
       - name: Restore
-        run: dotnet restore AudioMonitorRouter.sln
+        run: dotnet restore ScreenSound.sln
 
       - name: Publish framework-dependent (win-x64)
         # Framework-dependent: ~6 MB output vs ~85 MB self-contained. The installer
@@ -74,7 +74,7 @@ jobs:
         # DirectWrite factory init — see https://github.com/dotnet/wpf/issues/6792
         shell: pwsh
         run: |
-          dotnet publish AudioMonitorRouter\AudioMonitorRouter.csproj `
+          dotnet publish ScreenSound\ScreenSound.csproj `
             -c Release `
             -r win-x64 `
             --self-contained false `
@@ -86,7 +86,7 @@ jobs:
       - name: Package portable zip
         shell: pwsh
         run: |
-          $zipName = "AudioMonitorRouter-${{ steps.version.outputs.VERSION }}-portable.zip"
+          $zipName = "ScreenSound-${{ steps.version.outputs.VERSION }}-portable.zip"
           Compress-Archive -Path "publish\*" -DestinationPath "publish\$zipName"
           Write-Host "Created $zipName"
 
@@ -100,13 +100,13 @@ jobs:
       - name: Upload portable build artifact
         uses: actions/upload-artifact@v4
         with:
-          name: AudioMonitorRouter-portable
-          path: publish\AudioMonitorRouter-${{ steps.version.outputs.VERSION }}-portable.zip
+          name: ScreenSound-portable
+          path: publish\ScreenSound-${{ steps.version.outputs.VERSION }}-portable.zip
 
       - name: Upload installer artifact
         uses: actions/upload-artifact@v4
         with:
-          name: AudioMonitorRouter-installer
+          name: ScreenSound-installer
           path: installer\Output\*.exe
 
       - name: Create GitHub Release
@@ -134,5 +134,5 @@ jobs:
           prerelease: false
           generate_release_notes: true
           files: |
-            publish/AudioMonitorRouter-${{ steps.version.outputs.VERSION }}-portable.zip
+            publish/ScreenSound-${{ steps.version.outputs.VERSION }}-portable.zip
             installer/Output/*.exe

AudioMonitorRouter.sln → ScreenSound.sln

@@ -3,7 +3,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AudioMonitorRouter", "AudioMonitorRouter\AudioMonitorRouter.csproj", "{1EC589BF-B74B-4DA1-B37F-FD128C16763D}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ScreenSound", "ScreenSound\ScreenSound.csproj", "{1EC589BF-B74B-4DA1-B37F-FD128C16763D}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

AudioMonitorRouter/App.xaml → ScreenSound/App.xaml

@@ -1,8 +1,8 @@
-<Application x:Class="AudioMonitorRouter.App"
+<Application x:Class="ScreenSound.App"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:wpfui="http://schemas.lepo.co/wpfui/2022/xaml"
-             xmlns:local="clr-namespace:AudioMonitorRouter"
+             xmlns:local="clr-namespace:ScreenSound"
 >
     <Application.Resources>
         <ResourceDictionary>

AudioMonitorRouter/App.xaml.cs → ScreenSound/App.xaml.cs

@@ -1,15 +1,56 @@
-using AudioMonitorRouter.Interop;
-using AudioMonitorRouter.Views;
+using ScreenSound.Interop;
+using ScreenSound.Views;
 using System.Globalization;
+using System.Threading;
 using System.Windows;
 using System.Windows.Data;
 
-namespace AudioMonitorRouter;
+namespace ScreenSound;
 
 public partial class App : Application
 {
+    // Single-instance guard. Two ScreenSound processes would race on the
+    // same HKCU Run-at-startup state, both create tray icons, and both
+    // fight over the per-session audio-policy calls for the same sessions.
+    // The "Local\" prefix scopes the mutex to the current Windows login
+    // session, so fast-user-switching still lets each user have their own
+    // copy while a double-click on the shortcut won't spawn a second one.
+    private const string SingleInstanceMutexName = @"Local\ScreenSound-SingleInstance";
+    private static Mutex? _singleInstanceMutex;
+
     protected override void OnStartup(StartupEventArgs e)
     {
+        // Acquire the mutex FIRST, before any side effects (DPI config,
+        // window creation, tray icon). If another copy is already running
+        // we want to bail out cleanly with zero partial initialisation.
+        _singleInstanceMutex = new Mutex(initiallyOwned: false, name: SingleInstanceMutexName);
+        bool acquired;
+        try
+        {
+            acquired = _singleInstanceMutex.WaitOne(millisecondsTimeout: 0);
+        }
+        catch (AbandonedMutexException)
+        {
+            // Previous instance crashed without releasing. WaitOne still
+            // hands us ownership in that case, so treat as success — the
+            // mutex is now ours.
+            acquired = true;
+        }
+
+        if (!acquired)
+        {
+            MessageBox.Show(
+                "ScreenSound is already running — check the system tray.",
+                "ScreenSound",
+                MessageBoxButton.OK,
+                MessageBoxImage.Information);
+
+            _singleInstanceMutex.Dispose();
+            _singleInstanceMutex = null;
+            Shutdown();
+            return;
+        }
+
         // Force PerMonitorV2 DPI awareness before WPF creates any windows.
         try
         {
@@ -29,6 +70,22 @@ protected override void OnStartup(StartupEventArgs e)
         }
         // Otherwise, tray icon is already set up — window stays hidden
     }
+
+    protected override void OnExit(ExitEventArgs e)
+    {
+        // Release + dispose so an immediate relaunch can acquire cleanly.
+        // Without this, the OS would still reap the mutex on process exit,
+        // but explicit release avoids a brief race window where a fast
+        // double-click sees the mutex as still held.
+        if (_singleInstanceMutex != null)
+        {
+            try { _singleInstanceMutex.ReleaseMutex(); }
+            catch (ApplicationException) { /* Not owned (e.g. after an AbandonedMutexException path) — nothing to release. */ }
+            _singleInstanceMutex.Dispose();
+            _singleInstanceMutex = null;
+        }
+        base.OnExit(e);
+    }
 }
 
 public class ZeroToVisibilityConverter : IValueConverter

AudioMonitorRouter/Interop/AudioPolicyConfig.cs → ScreenSound/Interop/AudioPolicyConfig.cs

@@ -1,6 +1,6 @@
 using System.Runtime.InteropServices;
 
-namespace AudioMonitorRouter.Interop;
+namespace ScreenSound.Interop;
 
 public enum EDataFlow
 {

AudioMonitorRouter/Interop/NativeMethods.cs → ScreenSound/Interop/NativeMethods.cs

@@ -1,6 +1,6 @@
 using System.Runtime.InteropServices;
 
-namespace AudioMonitorRouter.Interop;
+namespace ScreenSound.Interop;
 
 public static class NativeMethods
 {

AudioMonitorRouter/Interop/WinEventHook.cs → ScreenSound/Interop/WinEventHook.cs

@@ -1,6 +1,6 @@
 using System.Runtime.InteropServices;
 
-namespace AudioMonitorRouter.Interop;
+namespace ScreenSound.Interop;
 
 /// <summary>
 /// Thin wrapper around SetWinEventHook for observing global window events

AudioMonitorRouter/Models/AppSettings.cs → ScreenSound/Models/AppSettings.cs

@@ -1,4 +1,4 @@
-namespace AudioMonitorRouter.Models;
+namespace ScreenSound.Models;
 
 public class AppSettings
 {

AudioMonitorRouter/Models/AudioDeviceInfo.cs → ScreenSound/Models/AudioDeviceInfo.cs

@@ -1,4 +1,4 @@
-namespace AudioMonitorRouter.Models;
+namespace ScreenSound.Models;
 
 public class AudioDeviceInfo
 {

AudioMonitorRouter/Models/AudioSessionInfo.cs → ScreenSound/Models/AudioSessionInfo.cs

@@ -1,4 +1,4 @@
-namespace AudioMonitorRouter.Models;
+namespace ScreenSound.Models;
 
 public class AudioSessionInfo
 {

AudioMonitorRouter/Models/MonitorInfo.cs → ScreenSound/Models/MonitorInfo.cs

@@ -1,4 +1,4 @@
-namespace AudioMonitorRouter.Models;
+namespace ScreenSound.Models;
 
 public class MonitorInfo
 {

AudioMonitorRouter/AudioMonitorRouter.csproj → ScreenSound/ScreenSound.csproj

@@ -14,16 +14,16 @@
     <NoWarn>WFAC010</NoWarn>
 
     <!-- Assembly metadata - shown in file properties & installer -->
-    <Version>1.0.0</Version>
-    <AssemblyVersion>1.0.0.0</AssemblyVersion>
-    <FileVersion>1.0.0.0</FileVersion>
-    <Product>Audio Monitor Router</Product>
-    <AssemblyTitle>Audio Monitor Router</AssemblyTitle>
+    <Version>2.0.0</Version>
+    <AssemblyVersion>2.0.0.0</AssemblyVersion>
+    <FileVersion>2.0.0.0</FileVersion>
+    <Product>ScreenSound</Product>
+    <AssemblyTitle>ScreenSound</AssemblyTitle>
     <Authors>twibster</Authors>
     <Company>twibster</Company>
-    <Description>Automatically routes per-app audio to different speakers based on monitor placement on Windows 11.</Description>
+    <Description>Sound follows your windows. Per-app audio routing for multi-monitor Windows 11 — each app plays through the speaker paired with the monitor it's on.</Description>
     <Copyright>Copyright (c) 2026 Omar Omran</Copyright>
-    <RepositoryUrl>https://github.com/twibster/AudioMonitorRouter</RepositoryUrl>
+    <RepositoryUrl>https://github.com/twibster/ScreenSound</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
   </PropertyGroup>
 

AudioMonitorRouter/Services/AudioDeviceNotifier.cs → ScreenSound/Services/AudioDeviceNotifier.cs

@@ -1,7 +1,7 @@
 using NAudio.CoreAudioApi;
 using NAudio.CoreAudioApi.Interfaces;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 /// <summary>
 /// Subscribes to Core Audio endpoint notifications so the UI and routing engine

AudioMonitorRouter/Services/AudioDeviceService.cs → ScreenSound/Services/AudioDeviceService.cs

@@ -1,7 +1,7 @@
-using AudioMonitorRouter.Models;
+using ScreenSound.Models;
 using NAudio.CoreAudioApi;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 public class AudioDeviceService : IDisposable
 {

AudioMonitorRouter/Services/AudioRouterService.cs → ScreenSound/Services/AudioRouterService.cs

@@ -1,6 +1,6 @@
-using AudioMonitorRouter.Interop;
+using ScreenSound.Interop;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 public class AudioRouterService : IDisposable
 {

AudioMonitorRouter/Services/AudioSessionNotifier.cs → ScreenSound/Services/AudioSessionNotifier.cs

@@ -1,6 +1,6 @@
 using NAudio.CoreAudioApi;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 /// <summary>
 /// Subscribes to <see cref="AudioSessionManager.OnSessionCreated"/> across all

AudioMonitorRouter/Services/AudioSessionService.cs → ScreenSound/Services/AudioSessionService.cs

@@ -1,8 +1,8 @@
-using AudioMonitorRouter.Models;
+using ScreenSound.Models;
 using NAudio.CoreAudioApi;
 using System.Diagnostics;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 public class AudioSessionService
 {

AudioMonitorRouter/Services/MonitorService.cs → ScreenSound/Services/MonitorService.cs

@@ -1,9 +1,9 @@
-using AudioMonitorRouter.Interop;
-using AudioMonitorRouter.Models;
+using ScreenSound.Interop;
+using ScreenSound.Models;
 using System.Diagnostics;
 using System.Runtime.InteropServices;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 public class MonitorService
 {

AudioMonitorRouter/Services/RoutingEngine.cs → ScreenSound/Services/RoutingEngine.cs

@@ -1,9 +1,9 @@
-using AudioMonitorRouter.Interop;
-using AudioMonitorRouter.Models;
+using ScreenSound.Interop;
+using ScreenSound.Models;
 using Microsoft.Win32;
 using System.Collections.Concurrent;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 /// <summary>
 /// Drives audio routing in response to signals:

AudioMonitorRouter/Services/SettingsService.cs → ScreenSound/Services/SettingsService.cs

@@ -1,14 +1,14 @@
-using AudioMonitorRouter.Models;
+using ScreenSound.Models;
 using System.IO;
 using System.Text.Json;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 public class SettingsService
 {
     private static readonly string SettingsDir = Path.Combine(
         Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
-        "AudioMonitorRouter");
+        "ScreenSound");
 
     private static readonly string SettingsFile = Path.Combine(SettingsDir, "settings.json");
 

AudioMonitorRouter/Services/UpdateService.cs → ScreenSound/Services/UpdateService.cs

@@ -4,7 +4,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
-namespace AudioMonitorRouter.Services;
+namespace ScreenSound.Services;
 
 /// <summary>
 /// Outcome of an update probe. The About page binds its status text to one of
@@ -41,7 +41,7 @@ public class UpdateService
     // Public, unauthenticated endpoint — rate-limited to 60 requests/hour per IP,
     // which is plenty for a user-initiated "check for updates" button.
     private const string LatestReleaseApi =
-        "https://api.github.com/repos/twibster/AudioMonitorRouter/releases/latest";
+        "https://api.github.com/repos/twibster/ScreenSound/releases/latest";
 
     // GitHub requires a User-Agent on every request; the product name is also
     // useful in their server logs if we ever need to correlate a rate-limit bug
@@ -53,8 +53,8 @@ public class UpdateService
 
     private static ProductInfoHeaderValue BuildUserAgent()
     {
-        try { return new ProductInfoHeaderValue("AudioMonitorRouter", GetInformationalVersion()); }
-        catch { return new ProductInfoHeaderValue("AudioMonitorRouter", "1.0"); }
+        try { return new ProductInfoHeaderValue("ScreenSound", GetInformationalVersion()); }
+        catch { return new ProductInfoHeaderValue("ScreenSound", "1.0"); }
     }
 
     /// <summary>
@@ -118,7 +118,7 @@ public async Task<UpdateCheckResult> CheckForUpdateAsync(CancellationToken ct =
             // legally contain characters (/, #, spaces) that would otherwise
             // break the path segment.
             string releaseUrl = release.HtmlUrl ??
-                $"https://github.com/twibster/AudioMonitorRouter/releases/tag/{Uri.EscapeDataString(release.TagName)}";
+                $"https://github.com/twibster/ScreenSound/releases/tag/{Uri.EscapeDataString(release.TagName)}";
 
             return CompareSemVer(latest, current) > 0
                 ? new UpdateCheckResult.UpdateAvailable(current, latest, releaseUrl)

AudioMonitorRouter/ViewModels/MainWindowViewModel.cs → ScreenSound/ViewModels/MainWindowViewModel.cs

@@ -1,5 +1,5 @@
-using AudioMonitorRouter.Models;
-using AudioMonitorRouter.Services;
+using ScreenSound.Models;
+using ScreenSound.Services;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using Microsoft.Win32;
@@ -11,7 +11,7 @@
 using System.Windows.Media.Imaging;
 using System.Windows.Threading;
 
-namespace AudioMonitorRouter.ViewModels;
+namespace ScreenSound.ViewModels;
 
 public partial class MonitorMappingViewModel : ObservableObject
 {
@@ -135,7 +135,7 @@ public partial class MainWindowViewModel : ObservableObject, IDisposable
     private static readonly TimeSpan DeviceRefreshDebounce = TimeSpan.FromMilliseconds(300);
 
     private const string AutoStartRegistryKey = @"Software\Microsoft\Windows\CurrentVersion\Run";
-    private const string AppRegistryName = "AudioMonitorRouter";
+    private const string AppRegistryName = "ScreenSound";
 
     private readonly Dictionary<uint, ImageSource?> _iconCache = new();