Removed leftover lock, started adding Task result to SendPCMFrame.

src/Discord.Net.Net45/Discord.Net.csproj

@@ -122,6 +122,9 @@
     <Compile Include="..\Discord.Net\Helpers\JsonHttpClient.Events.cs">
       <Link>Helpers\JsonHttpClient.Events.cs</Link>
     </Compile>
+    <Compile Include="..\Discord.Net\Helpers\TaskHelper.cs">
+      <Link>Helpers\TaskHelper.cs</Link>
+    </Compile>
     <Compile Include="..\Discord.Net\HttpException.cs">
       <Link>HttpException.cs</Link>
     </Compile>

src/Discord.Net/DiscordClient.cs

@@ -645,15 +645,15 @@ namespace Discord
 		/// <summary> Sends a PCM frame to the voice server. </summary>
 		/// <param name="data">PCM frame to send.</param>
 		/// <param name="count">Number of bytes in this frame. </param>
-		public void SendVoicePCM(byte[] data, int count)
+		public Task SendVoicePCM(byte[] data, int count)
 		{
 			CheckReady();
 			if (!_config.EnableVoice) throw new InvalidOperationException("Voice is not enabled for this client.");
-			if (count == 0) return;
+			if (count == 0) return TaskHelper.CompletedTask;
 
 			if (_isDebugMode)
 				RaiseOnDebugMessage(DebugMessageType.VoiceOutput, $"Queued {count} bytes for voice output.");
-			_voiceWebSocket.SendPCMFrame(data, count);
+			return _voiceWebSocket.SendPCMFrame(data, count);
 		}
 
 		/// <summary> Clears the PCM buffer. </summary>

src/Discord.Net/DiscordDataSocket.cs

@@ -1,4 +1,5 @@
 using Discord.API.Models;
+using Discord.Helpers;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using System;
@@ -81,11 +82,7 @@ namespace Discord
 						RaiseOnDebugMessage(DebugMessageType.WebSocketUnknownOpCode, "Unknown Opcode: " + msg.Operation);
 					break;
 			}
-#if DNXCORE
-			return Task.CompletedTask
-#else
-			return Task.Delay(0);
-#endif
+			return TaskHelper.CompletedTask;
 		}
 
 		protected override object GetKeepAlive()

src/Discord.Net/DiscordVoiceSocket.cs

@@ -369,25 +369,27 @@ namespace Discord
 			}
         }
 
-		public void SendPCMFrame(byte[] data, int count)
+		public Task SendPCMFrame(byte[] data, int count)
 		{
 			if (count != _encoder.FrameSize)
 				throw new InvalidOperationException($"Invalid frame size. Got {count}, expected {_encoder.FrameSize}.");
 
-			lock (_encoder)
+			byte[] payload;
+			int encodedLength;
+            lock (_encoder)
 			{
-				byte[] payload = new byte[4000];
-				int encodedLength = _encoder.EncodeFrame(data, payload);
+				payload = new byte[4000];
+				encodedLength = _encoder.EncodeFrame(data, payload);
 
 				if (_mode == "xsalsa20_poly1305")
 				{
 					//TODO: Encode
 				}
-
-				lock (_sendQueue)
-					_sendQueue.Enqueue(new Packet(payload, encodedLength));
 			}
-		}
+			_sendQueue.Enqueue(new Packet(payload, encodedLength));
+
+			return Task.Delay(0);
+        }
 		public void ClearPCMFrames()
 		{
 			_isClearing = true;

src/Discord.Net/Helpers/TaskHelper.cs

@@ -0,0 +1,17 @@
+using System.Threading.Tasks;
+
+namespace Discord.Helpers
+{
+    internal static class TaskHelper
+    {
+		public static Task CompletedTask { get; }
+		static TaskHelper()
+		{
+#if DNXCORE50
+			CompletedTask = Task.CompletedTask;
+#else
+			CompletedTask = Task.Delay(0);
+#endif
+		}
+	}
+}