OS version: 10.6.6 or higher
Added an option to prefer square images when searching for artwork online.
Added the ability to customize MP4 tag mappings in the preferences.
Copy All Tags now copies artwork as well.
Pressing return when editing in the table view now moves you to the next row.
Added a Date Created field.
When adding artwork, defaults to the folder that contains the selected files.
Added a preference to clear the files when adding new files.
Fixed an issue where a '2' would occasionally be added when renaming a file.
Fixed a possible issue with retrieving artwork from Google.
Courtesy of Special K
Metadatics is a powerful and advanced audio metadata editor.
It supports batch editing of most common audio file types including MP3, M4A, AIFF, WAV, FLAC, APE, OGG, WMA, and more. Lookup metadata from online sources, rename files based on metadata, or manipulate metadata using one of the many built in functions. Metadatics provides all you need to edit metadata with ease and flexibility.
Batch Editing – Edit multiple files at once quickly and easily.
Functions – Metadatics has a number of built in function to quickly manipulate data. Replace text, remove characters from the beginning or end of a tag, generate number sequences, copy from tag-to-tag, and much more!
Online Sources – Search for album artwork and tags from sources including Amazon and MusicBrainz.
Album Artwork – Metadatics supports reading and writing multiple images per file. Artwork can be extracted from files and saved as a separate image file. You can also search for artwork from online sources including Amazon.
File Rename – Generate directory structures and rename files based on metadata.
Support For Many Metadata Formats – Metadatics supports reading and writing ID3v1, ID3v2, MP4, Vorbis, APE, and ASF tags all from a variety of audio file types.
More info: https://itunes.apple.com/us/app/metadatics/id554883654