- _metadata["TITLE"] = title == "" ? "Unknown title" : title.trimmed();
- _metadata["ARTIST"] = artist == "" ? "Unknown artist" : artist.trimmed();
- _metadata["ALBUM"] = album == "" ? "Unknown album" : album.trimmed();
+ _metadata["TITLE"] = title == "" ? _UNKNOWN_TRACK_ : title.trimmed();
+ _metadata["ARTIST"] = artist == "" ? _UNKNOWN_ARTIST_ : artist.trimmed();
+ _metadata["ALBUM"] = album == "" ? _UNKNOWN_ALBUM_ : album.trimmed();