AAC to MP3 Converter is one freeware to convert AAC audio to MP3 audio, and convert MP3 audio to AAC audio also, it is one absolutely FREE audio tool from www.aactomp3converter.com, this software can support batch conversion, and you can add multiple AAC files and converts in batch. The conversion is very quick; the output files have high audio quality. This software is designed for anyone, include beginners, it is very easy-to-use without knowledge of AAC and MP3 formats.