Minor doc edit.

src/Discord.Net/DiscordClient.cs

@@ -643,7 +643,7 @@ namespace Discord
 		}
 
 		/// <summary> Sends a PCM frame to the voice server. </summary>
-		/// <param name="data">PCM frame to send. This must be a 48Kz 20ms </param>
+		/// <param name="data">PCM frame to send. This must be an uncompressed 48Kz monochannel 20ms PCM frame. </param>
 		/// <param name="count">Number of bytes in this frame. </param>
 		/// <remarks>Will block until</remarks>
 		public void SendVoicePCM(byte[] data, int count)