diff --git a/reactos/drivers/ksfilter/ks/irp.c b/reactos/drivers/ksfilter/ks/irp.c
index 5eef3bfb338..722d1e1e659 100644
--- a/reactos/drivers/ksfilter/ks/irp.c
+++ b/reactos/drivers/ksfilter/ks/irp.c
@@ -759,7 +759,13 @@ KsCreate(
         }
         else if (DeviceHeader->ItemList[Index].bCreated && IoStack->FileObject->FileName.Buffer != NULL)
         {
-            ULONG Length = wcslen(DeviceHeader->ItemList[Index].ObjectHeader->CreateItem->ObjectClass.Buffer);
+            ULONG Length;
+
+            ASSERT(DeviceHeader->ItemList[Index].ObjectHeader);
+            ASSERT(DeviceHeader->ItemList[Index].ObjectHeader->CreateItem);
+            ASSERT(DeviceHeader->ItemList[Index].ObjectHeader->CreateItem->ObjectClass.Buffer);
+
+            Length = wcslen(DeviceHeader->ItemList[Index].ObjectHeader->CreateItem->ObjectClass.Buffer);
 
             /* filter for that type has already exists */
             if (!_wcsnicmp(DeviceHeader->ItemList[Index].ObjectHeader->CreateItem->ObjectClass.Buffer,
diff --git a/reactos/drivers/wdm/audio/filters/kmixer/filter.c b/reactos/drivers/wdm/audio/filters/kmixer/filter.c
index 7bf41aed2dc..68400372d39 100644
--- a/reactos/drivers/wdm/audio/filters/kmixer/filter.c
+++ b/reactos/drivers/wdm/audio/filters/kmixer/filter.c
@@ -189,6 +189,7 @@ DispatchCreateKMix(
     KSOBJECT_HEADER ObjectHeader;
     PIO_STACK_LOCATION IoStatus;
     LPWSTR Buffer;
+    PKSOBJECT_CREATE_ITEM CreateItem;
 
     static LPWSTR KS_NAME_PIN = L"{146F1A80-4791-11D0-A5D6-28DB04C10000}";
 
@@ -211,8 +212,23 @@ DispatchCreateKMix(
         }
     }
 
+    /* allocate create item */
+    CreateItem = ExAllocatePool(NonPagedPool, sizeof(KSOBJECT_CREATE_ITEM));
+    if (!CreateItem)
+    {
+        Irp->IoStatus.Information = 0;
+        Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
+        IoCompleteRequest(Irp, IO_NO_INCREMENT);
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    /* zero create struct */
+    RtlZeroMemory(CreateItem, sizeof(KSOBJECT_CREATE_ITEM));
+
+    RtlInitUnicodeString(&CreateItem->ObjectClass, L"KMixer");
+
     /* allocate object header */
-    Status = KsAllocateObjectHeader(&ObjectHeader, 0, NULL, Irp, &DispatchTable);
+    Status = KsAllocateObjectHeader(&ObjectHeader, 1, CreateItem, Irp, &DispatchTable);
 
     DPRINT("KsAllocateObjectHeader result %x\n", Status);
     /* complete the irp */
diff --git a/reactos/drivers/wdm/audio/legacy/wdmaud/mixer.c b/reactos/drivers/wdm/audio/legacy/wdmaud/mixer.c
index 715342d52d9..4cdc139c6d0 100644
--- a/reactos/drivers/wdm/audio/legacy/wdmaud/mixer.c
+++ b/reactos/drivers/wdm/audio/legacy/wdmaud/mixer.c
@@ -133,7 +133,6 @@ GetNumOfMixerDevices(
     NTSTATUS Status;
     PWDMAUD_DEVICE_EXTENSION DeviceExtension;
 
-
     Pin.Property.Set = KSPROPSETID_Sysaudio;
     Pin.Property.Id = KSPROPERTY_SYSAUDIO_DEVICE_COUNT;
     Pin.Property.Flags = KSPROPERTY_TYPE_GET;
@@ -143,7 +142,7 @@ GetNumOfMixerDevices(
     Count = 0;
     Status = KsSynchronousIoControlDevice(DeviceExtension->FileObject, KernelMode, IOCTL_KS_PROPERTY, (PVOID)&Pin, sizeof(KSPROPERTY), (PVOID)&Count, sizeof(ULONG), &BytesReturned);
     if (!NT_SUCCESS(Status) || !Count)
-        return STATUS_UNSUCCESSFUL;
+        return 0;
 
     NumPins = 0;
     for(Index = 0; Index < Count; Index++)
diff --git a/reactos/drivers/wdm/audio/sysaudio/control.c b/reactos/drivers/wdm/audio/sysaudio/control.c
index 12da3d4a221..0d6484ed5a4 100644
--- a/reactos/drivers/wdm/audio/sysaudio/control.c
+++ b/reactos/drivers/wdm/audio/sysaudio/control.c
@@ -256,7 +256,7 @@ CreateMixerPinAndSetFormat(
     HANDLE PinHandle;
     PFILE_OBJECT FileObject;
 
-    Status = KsCreatePin(KMixerHandle, PinConnect, GENERIC_READ | GENERIC_WRITE, &PinHandle);
+    Status = KsoCreatePin(KMixerHandle, PinConnect, GENERIC_READ | GENERIC_WRITE, &PinHandle, L"KMixer");
 
     if (!NT_SUCCESS(Status))
     {
@@ -419,7 +419,7 @@ CreatePinWorkerRoutine(
 
     DPRINT1("creating virtual pin\n");
     /* now create the virtual audio pin which is exposed to wdmaud */
-    Status = KsCreatePin(Filter, WorkerContext->PinConnect, GENERIC_READ | GENERIC_WRITE, &VirtualPinHandle);
+    Status = KsoCreatePin(Filter, WorkerContext->PinConnect, GENERIC_READ | GENERIC_WRITE, &VirtualPinHandle, L"SysAudio");
 
     if (!NT_SUCCESS(Status))
     {
diff --git a/reactos/drivers/wdm/audio/sysaudio/dispatcher.c b/reactos/drivers/wdm/audio/sysaudio/dispatcher.c
index a3fff3d7f43..4946ec64886 100644
--- a/reactos/drivers/wdm/audio/sysaudio/dispatcher.c
+++ b/reactos/drivers/wdm/audio/sysaudio/dispatcher.c
@@ -346,6 +346,7 @@ DispatchCreateSysAudio(
 
     /* store create context */
     CreateItem->Context = (PVOID)Client;
+    RtlInitUnicodeString(&CreateItem->ObjectClass, L"SysAudio");
 
     /* store the object in FsContext */
     IoStatus->FileObject->FsContext2 = (PVOID)Client;