Fixed a couple audio bugs

src/Discord.Net.WebSocket/Audio/AudioClient.cs

@@ -253,7 +253,7 @@ namespace Discord.Audio
 
         private async Task RunHeartbeatAsync(int intervalMillis, CancellationToken cancelToken)
         {
-            //Clean this up when Discord's session patch is live
+            //TODO: Clean this up when Discord's session patch is live
             try
             {
                 await _audioLogger.DebugAsync("Heartbeat Started").ConfigureAwait(false);
@@ -261,17 +261,15 @@ namespace Discord.Audio
                 {
                     var now = Environment.TickCount;
 
-                    //Did server respond to our last heartbeat, or are we still receiving messages (long load?)
+                    //Did server respond to our last heartbeat?
                     if (_heartbeatTimes.Count != 0 && (now - _lastMessageTime) > intervalMillis && 
                         ConnectionState == ConnectionState.Connected)
                     {
                         _connection.Error(new Exception("Server missed last heartbeat"));
                         return;
                     }
-                    _heartbeatTimes.Enqueue(now);
-
-                    await Task.Delay(intervalMillis, cancelToken).ConfigureAwait(false);
 
+                    _heartbeatTimes.Enqueue(now);
                     try
                     {
                         await ApiClient.SendHeartbeatAsync().ConfigureAwait(false);

src/Discord.Net.WebSocket/Audio/Opus/OpusEncoder.cs

@@ -68,9 +68,12 @@ namespace Discord.Audio
             if (result < 0)
                 throw new Exception($"Opus Error: {(OpusError)result}");
 
-            /*result = EncoderCtl(_ptr, OpusCtl.SetBandwidth, 1105);
-            if (result < 0)
-                throw new Exception($"Opus Error: {(OpusError)result}");*/
+            /*if (application == AudioApplication.Music)
+            {
+                result = EncoderCtl(_ptr, OpusCtl.SetBandwidth, 1105);
+                if (result < 0)
+                    throw new Exception($"Opus Error: {(OpusError)result}");
+            }*/
         }
 
         /// <summary> Produces Opus encoded audio from PCM samples. </summary>

src/Discord.Net.WebSocket/Audio/Streams/BufferedWriteStream.cs

@@ -38,7 +38,7 @@ namespace Discord.Audio.Streams
             : this(next, samplesPerFrame, bufferMillis, cancelToken, null, maxFrameSize) { }
         internal BufferedWriteStream(AudioOutStream next, int samplesPerFrame, int bufferMillis, CancellationToken cancelToken, Logger logger, int maxFrameSize = 1500)
         {
-            //maxFrameSize = 1275 was too limiting at 128*1024
+            //maxFrameSize = 1275 was too limiting at 128kbps,2ch,60ms
             _next = next;
             _ticksPerFrame = samplesPerFrame / 48;
             _logger = logger;
@@ -57,11 +57,11 @@ namespace Discord.Audio.Streams
 
         private Task Run()
         {
-#if DEBUG
-            uint num = 0;
-#endif
             return Task.Run(async () =>
             {
+#if DEBUG
+                uint num = 0;
+#endif
                 try
                 {
                     while (!_isPreloaded && !_cancelToken.IsCancellationRequested)
@@ -70,10 +70,9 @@ namespace Discord.Audio.Streams
                     long nextTick = Environment.TickCount;
                     while (!_cancelToken.IsCancellationRequested)
                     {
-                        const int limit = 1;
                         long tick = Environment.TickCount;
                         long dist = nextTick - tick;
-                        if (dist <= limit)
+                        if (dist <= 0)
                         {
                             Frame frame;
                             if (_queuedFrames.TryDequeue(out frame))
@@ -86,17 +85,20 @@ namespace Discord.Audio.Streams
                                 var _ = _logger.DebugAsync($"{num++}: Sent {frame.Bytes} bytes ({_queuedFrames.Count} frames buffered)");
 #endif
                             }
-                            else if (dist == 0)
+                            else 
                             {
-                                await _next.WriteAsync(_silenceFrame, 0, _silenceFrame.Length).ConfigureAwait(false);
-                                nextTick += _ticksPerFrame;
+                                while ((nextTick - tick) <= 0)
+                                {
+                                    await _next.WriteAsync(_silenceFrame, 0, _silenceFrame.Length).ConfigureAwait(false);
+                                    nextTick += _ticksPerFrame;
+                                }
 #if DEBUG
                                 var _ = _logger.DebugAsync($"{num++}: Buffer underrun");
 #endif
                             }
                         }
                         else
-                            await Task.Delay((int)(dist - (limit - 1))/*, _cancelToken*/).ConfigureAwait(false);
+                            await Task.Delay((int)(dist)/*, _cancelToken*/).ConfigureAwait(false);
                     }
                 }
                 catch (OperationCanceledException) { }

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -1556,8 +1556,8 @@ namespace Discord.WebSocket
                             return;
                         }
                     }
-                    _heartbeatTimes.Enqueue(now);
 
+                    _heartbeatTimes.Enqueue(now);
                     try
                     {
                         await ApiClient.SendHeartbeatAsync(_lastSeq).ConfigureAwait(false);