Fixed several audio issues

src/Discord.Net/Audio/AudioClient.cs

@@ -14,8 +14,6 @@ namespace Discord.Audio
 {
     internal class AudioClient : IAudioClient, IDisposable
     {
-        public const int SampleRate = 48000;
-
         public event Func<Task> Connected
         {
             add { _connectedEvent.Add(value); }
@@ -81,6 +79,7 @@ namespace Discord.Audio
 
             ApiClient.SentGatewayMessage += async opCode => await _audioLogger.DebugAsync($"Sent {opCode}").ConfigureAwait(false);
             ApiClient.SentDiscovery += async () => await _audioLogger.DebugAsync($"Sent Discovery").ConfigureAwait(false);
+            ApiClient.SentData += async bytes => await _audioLogger.DebugAsync($"Sent {bytes} Bytes").ConfigureAwait(false);
             ApiClient.ReceivedEvent += ProcessMessageAsync;
             ApiClient.ReceivedPacket += ProcessPacketAsync;
             ApiClient.Disconnected += async ex =>
@@ -185,10 +184,10 @@ namespace Discord.Audio
         {
             return new RTPWriteStream(this, _secretKey, samplesPerFrame, _ssrc, bufferSize = 4000);
         }
-        public OpusEncodeStream CreatePCMStream(int samplesPerFrame, int? bitrate = null, int channels = 2,
+        public OpusEncodeStream CreatePCMStream(int samplesPerFrame, int? bitrate = null,
             OpusApplication application = OpusApplication.MusicOrMixed, int bufferSize = 4000)
         {
-            return new OpusEncodeStream(this, _secretKey, samplesPerFrame, _ssrc, SampleRate, bitrate, channels, application, bufferSize);
+            return new OpusEncodeStream(this, _secretKey, samplesPerFrame, _ssrc, bitrate, application, bufferSize);
         }
 
         private async Task ProcessMessageAsync(VoiceOpCode opCode, object payload)
@@ -283,7 +282,7 @@ namespace Discord.Audio
                     try
                     {
                         ip = Encoding.UTF8.GetString(packet, 4, 70 - 6).TrimEnd('\0');
-                        port = packet[68] | packet[69] << 8;
+                        port = packet[69] | (packet[68] << 8);
                     }
                     catch { return; }
                     

src/Discord.Net/Audio/IAudioClient.cs

@@ -18,7 +18,6 @@ namespace Discord.Audio
         Task DisconnectAsync();
 
         RTPWriteStream CreateOpusStream(int samplesPerFrame, int bufferSize = 4000);
-        OpusEncodeStream CreatePCMStream(int samplesPerFrame, int? bitrate = null, int channels = 2,
-            OpusApplication application = OpusApplication.MusicOrMixed, int bufferSize = 4000);
+        OpusEncodeStream CreatePCMStream(int samplesPerFrame, int? bitrate = null, OpusApplication application = OpusApplication.MusicOrMixed, int bufferSize = 4000);
     }
 }

src/Discord.Net/Audio/Streams/OpusEncodeStream.cs

@@ -2,15 +2,18 @@
 {
     public class OpusEncodeStream : RTPWriteStream
     {
+        public int SampleRate = 48000;
+        public int Channels = 2;
+
         private readonly byte[] _buffer;
         private readonly OpusEncoder _encoder;
 
-        internal OpusEncodeStream(AudioClient audioClient, byte[] secretKey, int samplesPerFrame, uint ssrc, int samplingRate, int? bitrate = null, 
-            int channels = OpusConverter.MaxChannels,  OpusApplication application = OpusApplication.MusicOrMixed, int bufferSize = 4000)
+        internal OpusEncodeStream(AudioClient audioClient, byte[] secretKey, int samplesPerFrame, uint ssrc, int? bitrate = null, 
+            OpusApplication application = OpusApplication.MusicOrMixed, int bufferSize = 4000)
             : base(audioClient, secretKey, samplesPerFrame, ssrc)
         {
             _buffer = new byte[bufferSize];
-            _encoder = new OpusEncoder(samplingRate, channels);
+            _encoder = new OpusEncoder(SampleRate, Channels);
 
             _encoder.SetForwardErrorCorrection(true);
             if (bitrate != null)

src/Discord.Net/Audio/Streams/RTPWriteStream.cs

@@ -36,7 +36,7 @@ namespace Discord.Audio
             unchecked
             {
                 if (_buffer[3]++ == byte.MaxValue)
-                    _buffer[4]++;
+                    _buffer[2]++;
 
                 _timestamp += (uint)_samplesPerFrame;
                 _buffer[4] = (byte)(_timestamp >> 24);
@@ -45,9 +45,9 @@ namespace Discord.Audio
                 _buffer[7] = (byte)(_timestamp >> 0);
             }
 
-            Buffer.BlockCopy(buffer, 0, _nonce, 0, 12);
+            Buffer.BlockCopy(_buffer, 0, _nonce, 0, 12); //Copy the 12-byte header to be used for nonce
             count = SecretBox.Encrypt(buffer, offset, count, _buffer, 12, _nonce, _secretKey);
-            _audioClient.Send(_buffer, count);
+            _audioClient.Send(_buffer, count + 12);
         }
 
         public override void Flush() { }