Freeware Advanced Audio (AAC) Decoder including SBR decoding
http://www.audiocoding.com/.
FAAD2 is a HE, LC, MAIN and LTP profile, MPEG2 and MPEG-4 AAC decoder.
FAAD2 includes code for SBR (HE AAC) decoding.
FAAD2 is licensed under the GPL.
FAAD2 is written by M. Bakker