diff --git a/Source/AaxDecrypter/AaxDecrypter.csproj b/Source/AaxDecrypter/AaxDecrypter.csproj
index f5115a23..2de4aaf8 100644
--- a/Source/AaxDecrypter/AaxDecrypter.csproj
+++ b/Source/AaxDecrypter/AaxDecrypter.csproj
@@ -13,7 +13,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-	  <PackageReference Include="AAXClean.Codecs" Version="2.1.1.1" />
+	  <PackageReference Include="AAXClean.Codecs" Version="2.1.2.1" />
 	</ItemGroup>
 
 	<ItemGroup>
diff --git a/Source/FileLiberator/DownloadOptions.Factory.cs b/Source/FileLiberator/DownloadOptions.Factory.cs
index 4c1a8eb4..4a78f64c 100644
--- a/Source/FileLiberator/DownloadOptions.Factory.cs
+++ b/Source/FileLiberator/DownloadOptions.Factory.cs
@@ -125,7 +125,7 @@ public partial class DownloadOptions
 			//try to request a widevine content license using the user's audio settings
 			var aacCodecChoice = config.Request_xHE_AAC ? Codecs.xHE_AAC : Codecs.AAC_LC;
 			//Always use the ec+3 codec if converting to mp3
-			var spatialCodecChoice = config.SpatialAudioCodec is Configuration.SpatialCodec.AC_4 && !config.DecryptToLossy ? Codecs.AC_4 : Codecs.EC_3;
+			var spatialCodecChoice = config.SpatialAudioCodec is Configuration.SpatialCodec.AC_4 ? Codecs.AC_4 : Codecs.EC_3;
 
 			var contentLic
 				= await api.GetDownloadLicenseAsync(
diff --git a/Source/FileLiberator/DownloadOptions.cs b/Source/FileLiberator/DownloadOptions.cs
index 578c8ff5..e809237b 100644
--- a/Source/FileLiberator/DownloadOptions.cs
+++ b/Source/FileLiberator/DownloadOptions.cs
@@ -74,7 +74,7 @@ namespace FileLiberator
 			//If DrmType is not Adrm or Widevine, the delivered file is an unencrypted mp3.
 			OutputFormat
 				= licInfo.DrmType is not AudibleApi.Common.DrmType.Adrm and not AudibleApi.Common.DrmType.Widevine ||
-				(config.AllowLibationFixup && config.DecryptToLossy && licInfo.ContentMetadata.ContentReference.Codec != AudibleApi.Codecs.AC_4)
+				(config.AllowLibationFixup && config.DecryptToLossy)
 				? OutputFormat.Mp3
 				: OutputFormat.M4b;
 
diff --git a/Source/LibationAvalonia/Controls/Settings/Audio.axaml b/Source/LibationAvalonia/Controls/Settings/Audio.axaml
index 333d7845..6b0a1544 100644
--- a/Source/LibationAvalonia/Controls/Settings/Audio.axaml
+++ b/Source/LibationAvalonia/Controls/Settings/Audio.axaml
@@ -92,7 +92,6 @@
 						Margin="5,0,0,0"
 						Grid.Column="1"
 						VerticalAlignment="Center"
-						SelectionChanged="SpatialCodec_SelectionChanged"
 						ItemsSource="{CompiledBinding SpatialAudioCodecs}"
 						SelectedItem="{CompiledBinding SpatialAudioCodec}"/>
 				</Grid>
diff --git a/Source/LibationAvalonia/Controls/Settings/Audio.axaml.cs b/Source/LibationAvalonia/Controls/Settings/Audio.axaml.cs
index d87e9401..1aad2411 100644
--- a/Source/LibationAvalonia/Controls/Settings/Audio.axaml.cs
+++ b/Source/LibationAvalonia/Controls/Settings/Audio.axaml.cs
@@ -23,15 +23,6 @@ namespace LibationAvalonia.Controls.Settings
 			}
 		}
 
-		private void SpatialCodec_SelectionChanged(object sender, SelectionChangedEventArgs e)
-		{
-			if (_viewModel.SpatialAudioCodec.Value is Configuration.SpatialCodec.AC_4 && _viewModel.DecryptToLossy)
-			{
-				_viewModel.SpatialAudioCodec = _viewModel.SpatialAudioCodecs[0];
-				_viewModel.RaisePropertyChanged(nameof(AudioSettingsVM.SpatialAudioCodec));
-			}
-		}
-
 		private async void UseWidevine_IsCheckedChanged(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 		{
 			if (sender is CheckBox cbox && cbox.IsChecked is true)
diff --git a/Source/LibationAvalonia/ViewModels/Settings/AudioSettingsVM.cs b/Source/LibationAvalonia/ViewModels/Settings/AudioSettingsVM.cs
index ac7b3ca0..329bb7ad 100644
--- a/Source/LibationAvalonia/ViewModels/Settings/AudioSettingsVM.cs
+++ b/Source/LibationAvalonia/ViewModels/Settings/AudioSettingsVM.cs
@@ -145,18 +145,7 @@ namespace LibationAvalonia.ViewModels.Settings
 		public string StripAudibleBrandAudioTip => Configuration.GetHelpText(nameof(StripAudibleBrandAudio));
 		public bool StripUnabridged { get; set; }
 		public string StripUnabridgedTip => Configuration.GetHelpText(nameof(StripUnabridged));
-		public bool DecryptToLossy {
-			get => field;
-			set
-			{
-				this.RaiseAndSetIfChanged(ref field, value);
-				if (DecryptToLossy && SpatialAudioCodec.Value is Configuration.SpatialCodec.AC_4)
-				{
-					SpatialAudioCodec = SpatialAudioCodecs[0];
-					this.RaisePropertyChanged(nameof(SpatialAudioCodec));
-				}
-			}
-		}
+		public bool DecryptToLossy { get => field; set => this.RaiseAndSetIfChanged(ref field, value); }
 		public string DecryptToLossyTip => Configuration.GetHelpText(nameof(DecryptToLossy));
 		public bool MoveMoovToBeginning { get; set; }
 
diff --git a/Source/LibationFileManager/Configuration.HelpText.cs b/Source/LibationFileManager/Configuration.HelpText.cs
index 5f41c7dc..50d5caa2 100644
--- a/Source/LibationFileManager/Configuration.HelpText.cs
+++ b/Source/LibationFileManager/Configuration.HelpText.cs
@@ -86,8 +86,6 @@ namespace LibationFileManager
                 The Dolby Digital Plus (E-AC-3) codec is more widely
                 supported than the AC-4 codec, but E-AC-3 files are
                 much larger than AC-4 files.
-
-                AC-4 cannot be converted to MP3.
                 """ },
 			{nameof(UseWidevine), """
                 Some audiobooks are only delivered in the highest
diff --git a/Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs b/Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs
index c9014ce6..df4cd789 100644
--- a/Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs
+++ b/Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs
@@ -178,12 +178,6 @@ namespace LibationWinForms.Dialogs
 			moveMoovAtomCbox.Enabled = convertLosslessRb.Checked;
 			lameOptionsGb.Enabled = !convertLosslessRb.Checked;
 
-			if (convertLossyRb.Checked && requestSpatialCbox.Checked)
-			{
-				// Only E-AC-3 can be converted to mp3
-				spatialAudioCodecCb.SelectedIndex = 0;
-			}
-
 			lameTargetRb_CheckedChanged(sender, e);
 			LameMatchSourceBRCbox_CheckedChanged(sender, e);
 		}
@@ -205,14 +199,6 @@ namespace LibationWinForms.Dialogs
 			}
 		}
 
-		private void spatialAudioCodecCb_SelectedIndexChanged(object sender, EventArgs e)
-		{
-			if (spatialAudioCodecCb.SelectedIndex == 1 && convertLossyRb.Checked)
-			{
-				// Only E-AC-3 can be converted to mp3
-				spatialAudioCodecCb.SelectedIndex = 0;
-			}
-		}
 		private void requestSpatialCbox_CheckedChanged(object sender, EventArgs e)
 		{
 			spatialAudioCodecCb.Enabled = requestSpatialCbox.Checked && useWidevineCbox.Checked;
diff --git a/Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs b/Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs
index 069ce7c9..446cdfb9 100644
--- a/Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs
+++ b/Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs
@@ -897,7 +897,6 @@
 			spatialAudioCodecCb.Name = "spatialAudioCodecCb";
 			spatialAudioCodecCb.Size = new System.Drawing.Size(173, 23);
 			spatialAudioCodecCb.TabIndex = 5;
-			spatialAudioCodecCb.SelectedIndexChanged += spatialAudioCodecCb_SelectedIndexChanged;
 			// 
 			// moveMoovAtomCbox
 			//