fix voices not respecting the faux mastering voice

src/Audio/AudioDevice.cs

@@ -105,7 +105,7 @@ namespace MoonWorks.Audio
 				return;
 			}
 
-			fauxMasteringVoice = new SubmixVoice(this, DeviceDetails.OutputFormat.Format.nChannels, DeviceDetails.OutputFormat.Format.nSamplesPerSec, int.MaxValue);
+			fauxMasteringVoice = SubmixVoice.CreateFauxMasteringVoice(this);
 
 			/* Init 3D Audio */
 

src/Audio/SourceVoice.cs

@@ -69,6 +69,8 @@ namespace MoonWorks.Audio
 				IntPtr.Zero, // default sends to mastering voice!
 				IntPtr.Zero
 			);
+
+			SetOutputVoice(device.MasteringVoice);
 		}
 
 		/// <summary>

src/Audio/SubmixVoice.cs

@@ -23,9 +23,34 @@ namespace MoonWorks.Audio
 				sampleRate,
 				FAudio.FAUDIO_VOICE_USEFILTER,
 				processingStage,
+				IntPtr.Zero,
+				IntPtr.Zero
+			);
+
+			SetOutputVoice(device.MasteringVoice);
+		}
+
+		private SubmixVoice(
+			AudioDevice device
+		) : base(device, device.DeviceDetails.OutputFormat.Format.nChannels, device.DeviceDetails.OutputFormat.Format.nChannels)
+		{
+			FAudio.FAudio_CreateSubmixVoice(
+				device.Handle,
+				out handle,
+				device.DeviceDetails.OutputFormat.Format.nChannels,
+				device.DeviceDetails.OutputFormat.Format.nSamplesPerSec,
+				FAudio.FAUDIO_VOICE_USEFILTER,
+				int.MaxValue,
 				IntPtr.Zero, // default sends to mastering voice
 				IntPtr.Zero
 			);
+
+			OutputVoice = null;
+		}
+
+		internal static SubmixVoice CreateFauxMasteringVoice(AudioDevice device)
+		{
+			return new SubmixVoice(device);
 		}
 	}
 }

src/Audio/Voice.cs

@@ -261,7 +261,6 @@ namespace MoonWorks.Audio
 		{
 			SourceChannelCount = sourceChannelCount;
 			DestinationChannelCount = destinationChannelCount;
-			OutputVoice = device.MasteringVoice;
 			nuint memsize = 4 * sourceChannelCount * destinationChannelCount;
 			pMatrixCoefficients = (byte*) NativeMemory.AllocZeroed(memsize);
 			SetPanMatrixCoefficients();