extern bool wait_for_jobs ();
extern std::shared_ptr<Film> new_test_film (std::string);
extern std::shared_ptr<Film> new_test_film2 (std::string, std::vector<std::shared_ptr<Content>> content = {}, Cleanup* cleanup = nullptr);
-extern void check_dcp (boost::filesystem::path, boost::filesystem::path);
+extern void check_dcp(boost::filesystem::path, boost::filesystem::path, bool sound_can_differ = false);
extern void check_dcp (boost::filesystem::path, std::shared_ptr<const Film>);
extern void check_file (boost::filesystem::path ref, boost::filesystem::path check);
extern void check_text_file (boost::filesystem::path ref, boost::filesystem::path check);