Swift MP3 MPC M4A to AC3 Conversion - Version 1.4.15 Swift MP3 MPC M4A to AC3 Conversion - You can edit the title, artist, album, year, genre and comment information of your files. Swift MP3 MPC M4A to AC3 Conversion is an easy-to-use tool to convert your audio CD to MP3, WAV, WMA and OGG file. Swift MP3 MPC M4A to AC3 Conversion copies the audio digitally-not through the soundcard-which enables you to make perfect copies of the originals.