The .AA3 file extension is basically an ATRAC Audio File format. This file format is mainly a compressed audio format type that makes use of the Sony's Adaptive Transform Acoustic Coding (ATRAC) compression algorithm. The Sony audio devices mainly support this file type.The .
After converting the file to the new format, you will be able to use other programs to support it. Keep in mind, however, that the FRG file after converting to AA3 may differ slightly from the original. The most important information should be kept, but if you want the file after conversion from FRG to AA3 to be the same, you have to do this carefully and choose the proper application from the list below.
There is no guarantee, of course, that the conversion will come up to all your expectations, but it will certainly help you. If, after all, the effect of converting FRG to AA3 does not meet your expectations, you can simply try to find on the Internet a different version of your file in FRG format, properly converted to a AA3 file by someone else. If this fails, use the information provided in the further part of the website.
Unfortunately, if after performing the two previously described steps (trying to find your FRG file converted by someone else, and the attempt to convert it to AA3 on your own) you still have a problem with your file, then there are only a few solutions left. You can once again try to find and install an application that can open the FRG file in its original format (without conversion to AA3 file). Such a solution will be difficult to implement, but it certainly will give the best result.