diff --git a/Source/AaxDecrypter/AaxDecrypter.csproj b/Source/AaxDecrypter/AaxDecrypter.csproj
index 0e9ee5eb..b27b02b1 100644
--- a/Source/AaxDecrypter/AaxDecrypter.csproj
+++ b/Source/AaxDecrypter/AaxDecrypter.csproj
@@ -5,8 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AAXClean" Version="0.4.7" />
-    <PackageReference Include="AAXClean.Codecs" Version="0.2.7" />
+    <PackageReference Include="AAXClean.Codecs" Version="0.2.8" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Source/AaxDecrypter/AaxcDownloadConvertBase.cs b/Source/AaxDecrypter/AaxcDownloadConvertBase.cs
index 72c9722e..f66e27c3 100644
--- a/Source/AaxDecrypter/AaxcDownloadConvertBase.cs
+++ b/Source/AaxDecrypter/AaxcDownloadConvertBase.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using AAXClean;
 using Dinah.Core.Net.Http;
 
@@ -109,10 +110,11 @@ namespace AaxDecrypter
 				});
 		}
 
-		public override void Cancel()
+		public override async Task CancelAsync()
 		{
 			IsCanceled = true;
-			AaxFile?.Cancel();
+			if (AaxFile != null)
+				await AaxFile.CancelAsync();
 			AaxFile?.Dispose();
 			CloseInputFileStream();
 		}
diff --git a/Source/AaxDecrypter/AaxcDownloadMultiConverter.cs b/Source/AaxDecrypter/AaxcDownloadMultiConverter.cs
index 18b6851a..76026a2e 100644
--- a/Source/AaxDecrypter/AaxcDownloadMultiConverter.cs
+++ b/Source/AaxDecrypter/AaxcDownloadMultiConverter.cs
@@ -61,7 +61,7 @@ That naming may not be desirable for everyone, but it's an easy change to instea
         {
             var zeroProgress = Step_DownloadAudiobook_Start();
 
-            var chapters = DownloadOptions.ChapterInfo.Chapters.ToList();
+            var chapters = DownloadOptions.ChapterInfo.Chapters;
 
             // Ensure split files are at least minChapterLength in duration.
             var splitChapters = new ChapterInfo(DownloadOptions.ChapterInfo.StartOffset);
@@ -104,8 +104,13 @@ That naming may not be desirable for everyone, but it's an easy change to instea
         {
             var chapterCount = 0;
             return AaxFile.ConvertToMultiMp4a(splitChapters, newSplitCallback =>
-                createOutputFileStream(++chapterCount, splitChapters, newSplitCallback),
-            DownloadOptions.TrimOutputToChapterLength);
+            {
+                createOutputFileStream(++chapterCount, splitChapters, newSplitCallback);
+
+                newSplitCallback.TrackNumber = chapterCount;
+                newSplitCallback.TrackCount = splitChapters.Count;
+
+            }, DownloadOptions.TrimOutputToChapterLength);
         }
 
         private ConversionResult ConvertToMultiMp3(ChapterInfo splitChapters)
@@ -114,7 +119,10 @@ That naming may not be desirable for everyone, but it's an easy change to instea
             return AaxFile.ConvertToMultiMp3(splitChapters, newSplitCallback =>
             {
                 createOutputFileStream(++chapterCount, splitChapters, newSplitCallback);
-                ((NAudio.Lame.LameConfig)newSplitCallback.UserState).ID3.Track = chapterCount.ToString();
+
+                newSplitCallback.TrackNumber = chapterCount;
+                newSplitCallback.TrackCount = splitChapters.Count;
+
             }, DownloadOptions.LameConfig, DownloadOptions.TrimOutputToChapterLength);
         }
 
@@ -125,7 +133,8 @@ That naming may not be desirable for everyone, but it's an easy change to instea
                 OutputFileName = OutputFileName,
                 PartsPosition = currentChapter,
                 PartsTotal = splitChapters.Count,
-                Title = newSplitCallback?.Chapter?.Title
+                Title = newSplitCallback?.Chapter?.Title,
+
             });
             fileName = FileUtility.GetValidFilename(fileName);
 
diff --git a/Source/AaxDecrypter/AudiobookDownloadBase.cs b/Source/AaxDecrypter/AudiobookDownloadBase.cs
index 3ce6c432..34e10579 100644
--- a/Source/AaxDecrypter/AudiobookDownloadBase.cs
+++ b/Source/AaxDecrypter/AudiobookDownloadBase.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Threading.Tasks;
 using Dinah.Core;
 using Dinah.Core.Net.Http;
 using Dinah.Core.StepRunner;
@@ -55,7 +56,7 @@ namespace AaxDecrypter
 			FileUtility.SaferDelete(OutputFileName);
 		}		
 
-		public abstract void Cancel();
+		public abstract Task CancelAsync();
 
 		public virtual void SetCoverArt(byte[] coverArt)
 		{
diff --git a/Source/AaxDecrypter/UnencryptedAudiobookDownloader.cs b/Source/AaxDecrypter/UnencryptedAudiobookDownloader.cs
index 885e839b..1040684b 100644
--- a/Source/AaxDecrypter/UnencryptedAudiobookDownloader.cs
+++ b/Source/AaxDecrypter/UnencryptedAudiobookDownloader.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Threading;
+using System.Threading.Tasks;
 using Dinah.Core.Net.Http;
 using Dinah.Core.StepRunner;
 using FileManager;
@@ -24,10 +25,11 @@ namespace AaxDecrypter
 			};
 		}
 
-		public override void Cancel()
+		public override Task CancelAsync()
 		{
 			IsCanceled = true;
 			CloseInputFileStream();
+			return Task.CompletedTask;
 		}
 
 		protected bool Step_GetMetadata()
diff --git a/Source/FileLiberator/AudioDecodable.cs b/Source/FileLiberator/AudioDecodable.cs
index f54e4b25..800b711b 100644
--- a/Source/FileLiberator/AudioDecodable.cs
+++ b/Source/FileLiberator/AudioDecodable.cs
@@ -1,6 +1,7 @@
 using LibationFileManager;
 using NAudio.Lame;
 using System;
+using System.Threading.Tasks;
 
 namespace FileLiberator
 {
@@ -12,7 +13,7 @@ namespace FileLiberator
         public event EventHandler<string> AuthorsDiscovered;
         public event EventHandler<string> NarratorsDiscovered;
         public event EventHandler<byte[]> CoverImageDiscovered;
-        public abstract void Cancel();
+        public abstract Task CancelAsync();
 
         protected LameConfig GetLameOptions(Configuration config)
         {
diff --git a/Source/FileLiberator/ConvertToMp3.cs b/Source/FileLiberator/ConvertToMp3.cs
index 92b2a3f2..58f54a0b 100644
--- a/Source/FileLiberator/ConvertToMp3.cs
+++ b/Source/FileLiberator/ConvertToMp3.cs
@@ -19,10 +19,7 @@ namespace FileLiberator
 		private long fileSize;
 		private static string Mp3FileName(string m4bPath) => Path.ChangeExtension(m4bPath ?? "", ".mp3");
 
-		public override void Cancel()
-		{            
-			m4bBook?.Cancel();
-		}
+		public override Task CancelAsync() => m4bBook?.CancelAsync();
 
 		public static bool ValidateMp3(LibraryBook libraryBook)
 		{
diff --git a/Source/FileLiberator/DownloadDecryptBook.cs b/Source/FileLiberator/DownloadDecryptBook.cs
index 5a12657e..d0f66e3d 100644
--- a/Source/FileLiberator/DownloadDecryptBook.cs
+++ b/Source/FileLiberator/DownloadDecryptBook.cs
@@ -21,7 +21,7 @@ namespace FileLiberator
 
 		public override bool Validate(LibraryBook libraryBook) => !libraryBook.Book.Audio_Exists();
 
-		public override void Cancel() => abDownloader?.Cancel();
+		public override Task CancelAsync() => abDownloader?.CancelAsync();
 
 		public override async Task<StatusHandler> ProcessAsync(LibraryBook libraryBook)
 		{
diff --git a/Source/LibationWinForms/ProcessQueue/ProcessBook.cs b/Source/LibationWinForms/ProcessQueue/ProcessBook.cs
index 0ddf4433..d4666e2e 100644
--- a/Source/LibationWinForms/ProcessQueue/ProcessBook.cs
+++ b/Source/LibationWinForms/ProcessQueue/ProcessBook.cs
@@ -143,10 +143,7 @@ namespace LibationWinForms.ProcessQueue
 			try
 			{
 				if (CurrentProcessable is AudioDecodable audioDecodable)
-				{
-					//There's some threadding bug that causes this to hang if executed synchronously.
-					await Task.Run(audioDecodable.Cancel);
-				}
+					await audioDecodable.CancelAsync();
 			}
 			catch (Exception ex)
 			{