Atrac3+ decoding with HiMDRenderer suggestion

[hyakki]

I tried tracking down MarC back when i made my convertie program because i also wanted a updated command line version but no luck :\, I ended up having to make convertie manually fill in the himd gui window for each file, I was going to use the old command line version but the gui one seemed to support more formats so i ended up sticking with that even if it was slower / buggy..