Update README.md

Author: XyLe-GBP

README.md

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-# ATRACTool
+# ATRACTool
+
+<p>Utility tool to convert Sony's ATRAC3/ATRAC3plus/ATRAC9(.AT3/.AT9) to Wave(.WAV) sound.</p>
+<p>Or convert Wave sound to Sony's ATRAC3/ATRAC3plus/ATRAC9.</p>
+<p>User interface functions are provided for SCEI ATRAC3plus Codec Tool (at3tool.exe) and SCEI ATRAC9 Codec Tool (at9tool.exe).</p>
+
+## Descriptions
+
+<p>This tool uses a multi-threaded(/MT) build, so it can be launched without the Visual C++ redistribution package.</p>
+
+---
+
+<p>The SCEI ATRAC3plus Codec TOOL(at3tool.exe) uses <code>MSVCR80.DLL</code>.</p>
+<p>If you get an error, please install the following package on your PC.</p>
+
+
+[Microsoft Visual C++ 2005 SP1 Redistributable Package (x86)](http://www.microsoft.com/ja-jp/download/details.aspx?id=5638)
+
+[Microsoft Visual C++ 2005 SP1 Redistributable Package (x64)](http://www.microsoft.com/ja-jp/download/details.aspx?id=18471)
+
+---
+
+<p>The SCEI ATRAC9 Codec TOOL(at9tool.exe) uses <code>MSVCR90.DLL</code>.</p>
+<p>If you get an error, please install the following package on your PC.</p>
+
+
+[Microsoft Visual C++ 2008 Redistributable Package (x86)](http://www.microsoft.com/ja-jp/download/details.aspx?id=29)
+
+[Microsoft Visual C++ 2008 Redistributable Package (x64)](http://www.microsoft.com/ja-jp/download/details.aspx?id=15336)
+
+---
+
+## What is this?
+
+<p>It is a tool that can decode Sony's ATRAC3/ATRAC3plus/ATRAC9 to Wave sound, and encode Wave sound to ATRAC3/ATRAC3plus/ATRAC9.</p>
+<p>ATRAC3 and ATRAC3plus are mainly used for PSP and PS3, while ATRAC9 is used for PSVita and PS4.</p>
+
+## System Requirements
+
+<p>This application does not work on non-x64 (64 bit) operating systems.</p>
+<p>※This application will not run on non-x64 (64-bit) operating systems. Please note that it cannot run on x86 (32-bit) PCs.</p>
+<p>(Unless you have a very old PC, you should be able to run it.)</p>
+
+## About Licensing
+
+This tool is released under the MIT license.