diff --git a/lib/stateManagement/openFileTypes.dart b/lib/stateManagement/openFileTypes.dart
index 7e7b8c25..e8d6bf80 100644
--- a/lib/stateManagement/openFileTypes.dart
+++ b/lib/stateManagement/openFileTypes.dart
@@ -546,9 +546,15 @@ class WavFileData with ChangeNotifier, HasUuid, AudioFileData {
 
   @override
   Future<void> load() async {
-    resource = await audioResourcesManager.getAudioResource(path);
+    resource = await audioResourcesManager.getAudioResource(path, makeCopy: true);
     notifyListeners();
   }
+
+  @override
+  void dispose() {
+    resource?.dispose();
+    super.dispose();
+  }
 }
 class WemFileData extends OpenFileData with AudioFileData {
   ValueNotifier<WavFileData?> overrideData = ValueNotifier(null);
@@ -616,6 +622,7 @@ class WemFileData extends OpenFileData with AudioFileData {
     await backupFile(path);
     var wav = overrideData.value!;
     await wavToWem(wav.path, path, basename(path).contains("BGM"));
+    overrideData.value!.dispose();
     overrideData.value = null;
 
     // reload
@@ -629,6 +636,15 @@ class WemFileData extends OpenFileData with AudioFileData {
     onOverrideApplied.notifyListeners();
   }
 
+  Future<void> removeOverride() async {
+    if (overrideData.value == null)
+      return;
+
+    overrideData.value!.dispose();
+    overrideData.value = null;
+    notifyListeners();
+  }
+
   @override
   Undoable takeSnapshot() {
     var snapshot = WemFileData(
diff --git a/lib/stateManagement/otherFileTypes/audioResourceManager.dart b/lib/stateManagement/otherFileTypes/audioResourceManager.dart
index 62a8ed23..79b6bc1a 100644
--- a/lib/stateManagement/otherFileTypes/audioResourceManager.dart
+++ b/lib/stateManagement/otherFileTypes/audioResourceManager.dart
@@ -3,6 +3,7 @@ import 'dart:io';
 import 'dart:math';
 
 import 'package:mutex/mutex.dart';
+import 'package:path/path.dart';
 import 'package:tuple/tuple.dart';
 
 import '../../fileTypeUtils/audio/riffParser.dart';
@@ -28,11 +29,12 @@ class AudioResource {
 class AudioResourcesManager {
   final Map<String, AudioResource> _resources = {};
   final Map<String, Mutex> _loadingMutexes = {};
+  String? _tmpDir;
 
   /// Returns a reference to the audio file at the given path.
   /// If the file is already loaded, it will return the same reference.
   /// If the file is not loaded, it will load it.
-  Future<AudioResource> getAudioResource(String path) async {
+  Future<AudioResource> getAudioResource(String path, { bool makeCopy = false }) async {
     if (!_loadingMutexes.containsKey(path))
       _loadingMutexes[path] = Mutex();
     await _loadingMutexes[path]!.acquire();
@@ -48,6 +50,9 @@ class AudioResourcesManager {
     if (path.endsWith(".wem")) {
       wavPath = await wemToWavTmp(path);
       deleteOnDispose = true;
+    } else if (makeCopy) {
+      wavPath = await _copyToTmp(path);
+      deleteOnDispose = true;
     }
 
     var riff = await RiffFile.fromFile(wavPath);
@@ -71,6 +76,13 @@ class AudioResourcesManager {
     return resource;
   }
 
+  Future<String> _copyToTmp(String path) async {
+    _tmpDir ??= (await Directory.systemTemp.createTemp("tmpWav")).path;
+    var tmpPath = join(_tmpDir!, basename(path));
+    await File(path).copy(tmpPath);
+    return tmpPath;
+  }
+
   Future<void> reloadAudioResource(AudioResource resource) async {
     if (resource.wemPath != null)
       resource.wavPath = await wemToWavTmp(resource.wemPath!);
@@ -94,6 +106,9 @@ class AudioResourcesManager {
       if (await File(path).exists())
         await File(path).delete();
     }));
+
+    if (_tmpDir != null && await Directory(_tmpDir!).exists())
+      await Directory(_tmpDir!).delete(recursive: true);
   }
 
   /// Disposes the reference to the audio file at the given path.
diff --git a/lib/widgets/propEditors/otherFileTypes/wemFileEditor.dart b/lib/widgets/propEditors/otherFileTypes/wemFileEditor.dart
index 80afef46..423514c1 100644
--- a/lib/widgets/propEditors/otherFileTypes/wemFileEditor.dart
+++ b/lib/widgets/propEditors/otherFileTypes/wemFileEditor.dart
@@ -58,7 +58,6 @@ class _WemFileEditorState extends ChangeNotifierState<WemFileEditor> {
       return;
     }
     var wavFile = WavFileData(file.path!);
-    await wavFile.load();
     widget.wem.overrideData.value = wavFile;
   }
 
@@ -80,7 +79,7 @@ class _WemFileEditorState extends ChangeNotifierState<WemFileEditor> {
               const SizedBox(width: 10),
               if (widget.wem.overrideData.value != null)
                 ElevatedButton(
-                  onPressed: () => widget.wem.overrideData.value = null,
+                  onPressed: () => widget.wem.removeOverride(),
                   style: getTheme(context).dialogSecondaryButtonStyle,
                   child: const Text("Remove"),
                 ),