smrt is a powerful python-based GUI and command line tool designed to ease the process of constantly renaming and tagging MP3 and OGG files. It performs the functions of a standard mass-tagger, such as translating a filename into tags, and creating a new filename from tag data. It is unique in its inclusion of powerful regular expression and custom text manipulation tools to manipulate filenames and tag data, and in its ability to search for and apply track data from the FreeDB project. All this is presented in a streamlined, informative GTK GUI. A small CLI tool is also provided for quick jobs.