+/* typedefs for compatibility to user-space */
+typedef struct iwffff_xwave iwffff_xwave_t;
+typedef struct iwffff_xlfo iwffff_xlfo_t;
+typedef struct iwffff_xenv_point iwffff_xenv_point_t;
+typedef struct iwffff_xenv_record iwffff_xenv_record_t;
+typedef struct iwffff_xenv iwffff_xenv_t;
+typedef struct iwffff_xlayer iwffff_xlayer_t;
+typedef struct iwffff_xinstrument iwffff_xinstrument_t;
+typedef struct iwffff_rom_header iwffff_rom_header_t;
+typedef struct iwffff_info iwffff_info_t;
+