Fixes issue when multiple audio channels are present. Fixes #315 Fixes #294

src/NzbDrone.Core/MediaFiles/MediaInfo/MediaInfoModel.cs

@@ -48,11 +48,12 @@ namespace NzbDrone.Core.MediaFiles.MediaInfo
                     return AudioChannelPositionsText.ContainsIgnoreCase("LFE") ? AudioChannels - 1 + 0.1m : AudioChannels;
                 }
 
-                decimal channels = 0;
-
-                decimal.TryParse(AudioChannelPositions.Split('/').First(), out channels);
-
-                return channels;
+                return
+                    AudioChannelPositions.Replace(" / ", "$")
+                        .Split('$')
+                        .First()
+                        .Split('/')
+                        .Sum(s => decimal.Parse(s, CultureInfo.InvariantCulture));
             }
         }
     }