diff --git a/lib/features/config_option/data/config_option_repository.dart b/lib/features/config_option/data/config_option_repository.dart
index e568a6ff..08c7d142 100644
--- a/lib/features/config_option/data/config_option_repository.dart
+++ b/lib/features/config_option/data/config_option_repository.dart
@@ -275,7 +275,7 @@ abstract class ConfigOptions {
   );
   static final warpNoiseMode = PreferencesNotifier.create<String, String>(
     "warp-noise-mode",
-    "m6",
+    "m4",
   );
 
   static final warpNoiseDelay = PreferencesNotifier.create<OptionalRange, String>(
diff --git a/libcore b/libcore
index 134bd69b..cfb37888 160000
--- a/libcore
+++ b/libcore
@@ -1 +1 @@
-Subproject commit 134bd69bd3b8503c38357fa74dcd6bd9c931a2e4
+Subproject commit cfb37888d420d9ae495c9e2fa3050dc051e12218