survive dsound initialization failure

BizHawk.MultiClient/Program.cs

@@ -19,8 +19,7 @@ namespace BizHawk.MultiClient
 			try { Global.DSound = new DirectSound(); }
 			catch
 			{
-				MessageBox.Show("Couldn't initialize DirectSound!", "Initialization Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				MessageBox.Show("Couldn't initialize DirectSound! Things may go poorly for you. Try changing your sound driver to 41khz instead of 48khz in mmsys.cpl.", "Initialization Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
-				return;
 			}
 
 			try { Global.Direct3D = new Direct3D(); }

BizHawk.MultiClient/Sound.cs

@@ -21,6 +21,8 @@ namespace BizHawk.MultiClient
 		private BufferedAsync semisync = new BufferedAsync();
 
 		public Sound(IntPtr handle, DirectSound device)
+		{
+			if (device != null)
 			{
 				device.SetCooperativeLevel(handle, CooperativeLevel.Priority);
 
@@ -38,6 +40,7 @@ namespace BizHawk.MultiClient
 				desc.SizeInBytes = BufferSize;
 				DSoundBuffer = new SecondarySoundBuffer(device, desc);
 				ChangeVolume(Global.Config.SoundVolume);
+			}
 			SoundBuffer = new byte[BufferSize];
 
 			disposed = false;
@@ -47,7 +50,7 @@ namespace BizHawk.MultiClient
 		{
 			if (disposed) throw new ObjectDisposedException("Sound");
 			if (Global.Config.SoundEnabled == false) return;
-
+			if (DSoundBuffer == null) return;
 			if (IsPlaying)
 				return;
 
@@ -101,6 +104,8 @@ namespace BizHawk.MultiClient
 		int soundoffset;
 		int SNDDXGetAudioSpace()
 		{
+			if (DSoundBuffer == null) return 0;
+
 			int playcursor = DSoundBuffer.CurrentPlayPosition;
 			int writecursor = DSoundBuffer.CurrentWritePosition;