At9tool.exe

If you are developing a custom theme for the PS Vita or modding a game track, use this workflow to compile your audio:

: It is often difficult to find officially, as it was originally part of private Sony developer kits, though it is widely mirrored on modding forums and GitHub repositories . at9tool.exe

Legitimately, at9tool.exe is distributed as part of official Sony software development kits (SDKs), specifically the PlayStation Vita SDK and the PlayStation 4 SDK. Because SDKs are proprietary and protected by non-disclosure agreements (NDAs), the tool is technically not public domain software. If you are developing a custom theme for

for %%a in ("*at9") do ( at9tool.exe -d "%%a" "%%~na.wav" ) for %%a in ("*at9") do ( at9tool

: at9tool.exe -e -br 144 input.wav output.at9 -e : Specifies "encode" mode. -br 144 : Sets the bitrate (standard is often 144kbps).

Manually converting dozens or hundreds of files one by one is tedious. The tool can be integrated into a for bulk operations. For example, a simple script can automate the conversion of all .wav files in a folder to .at9 format, saving an immense amount of time for large modding projects. The community has also created tools like at9convert.jar , which automatically finds and processes all .at9 files in a folder, acting as a more efficient frontend for the command-line tool.