Hello everyone! I wanted to tell you all that I think I am very close to cracking the ATRAC3plus header! I just have to find out what two bytes are equal to and then I will run a few tests to see if it works for me! I can create ATRAC3plus files through Sony Sound Forge and then delete their header and replace it with a complete header from a different ATRAC3plus header (for PSP), and it will actually play on the PSP! I'll upload a file to jumbofiles.com so that you may take a look at it. It will consist of three ATRAC3plus files (from Dissidia 012 Final Fantasy (please use only for the purpose I provided them for)), AT3toAA3 Converter, an ATRAC3plus file (aa3), it's PCM WAVE file, and my progress. Thank you all that will try to help! I'll make a post when I figure it out, or when it's resolved!