-                       .TotalLength              = (sizeof(USB_Audio_Interface_AC_t) +
-                                                    sizeof(USB_Audio_InputTerminal_t) +
-                                                    sizeof(USB_Audio_OutputTerminal_t)),
+                       .TotalLength              = (sizeof(USB_Audio_Descriptor_Interface_AC_t) +
+                                                    sizeof(USB_Audio_Descriptor_InputTerminal_t) +
+                                                    sizeof(USB_Audio_Descriptor_OutputTerminal_t)),