diff --git a/carla b/carla
index 0132f1a..3c10dce 160000
--- a/carla
+++ b/carla
@@ -1 +1 @@
-Subproject commit 0132f1ae47f7890974e458f9fb6314b9a63cd105
+Subproject commit 3c10dcee953fb2af12eebac5578bc64f266ee0ec
diff --git a/dpf b/dpf
index 57fcfca..87e9b0f 160000
--- a/dpf
+++ b/dpf
@@ -1 +1 @@
-Subproject commit 57fcfcaf07f8dced0f643aff46bd0d3bb1b0b476
+Subproject commit 87e9b0f8441229815c1cc8b0eb518ae760f9bf47
diff --git a/src/CardinalPlugin.cpp b/src/CardinalPlugin.cpp
index 60ea758..8aabd0c 100644
--- a/src/CardinalPlugin.cpp
+++ b/src/CardinalPlugin.cpp
@@ -742,7 +742,7 @@ protected:
         }
         else
         {
-            port.hints = kAudioPortIsCV | kCVPortHasPositiveUnipolarRange | kCVPortHasScaledRange;
+            port.hints = kAudioPortIsCV | kCVPortHasPositiveUnipolarRange | kCVPortHasScaledRange | kCVPortIsOptional;
             index -= 8;
         }
        #elif CARDINAL_VARIANT_FX || CARDINAL_VARIANT_NATIVE || CARDINAL_VARIANT_SYNTH