FAAD2 is the fastest ISO AAC audio decoder available. FAAD2 correctly decodes all MPEG-4 and MPEG-2 MAIN, LOW, LTP, LD and ER object type AAC files. There is a stable version of FAAD2 available, source code can be downloaded on the download page. The advantage of this new library is the lack of copyrighted code written by third parties. Further it is coded much cleaner and will give a much better understanding of the AAC coding algorithms.