extern std::string audio_channel_name (int);
extern std::string short_audio_channel_name (int);
extern bool valid_image_file (boost::filesystem::path);
+extern bool valid_sound_file (boost::filesystem::path);
extern bool valid_j2k_file (boost::filesystem::path);
#ifdef DCPOMATIC_WINDOWS
extern boost::filesystem::path mo_path ();
extern std::string video_asset_filename (boost::shared_ptr<dcp::PictureAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
extern std::string audio_asset_filename (boost::shared_ptr<dcp::SoundAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
extern float relaxed_string_to_float (std::string);
+extern std::string careful_string_filter (std::string);
#endif