Convert your audio files with the Nero AAC Codec - FREE!
Nero AAC reference quality MPEG-4 and 3GPP audio codec

Compression ratios ranging from Ultra High (58 CDs fit on one!) to High-End Audio (2.5:1), for absolutely perfect audiophile encodings
Crystal-clear, award-winning sound quality at every compression ratio and bit rate!
Support for embedded album art including covers, booklets, and lyrics
Store an entire audio album in a single .mp4 file with all the features of an Audio CD embedded inside, but at a fraction of the space!
Reference quality MPEG-4 audio codec
Fully compatible with the latest version of the state-of-the-art MPEG-4 audio standard (LC-AAC, HE-AAC and HE-AAC v2)