At9tool.exe New! Page
) into the compressed ATRAC9 format used by PlayStation hardware. It can also perform the reverse, decoding files back into playable Where to Find It Because it is a proprietary tool, at9tool.exe is officially part of the Sony PS4/PS Vita SDK (Software Development Kit) Legal Access:
In the intricate world of video game preservation, modding, and digital audio engineering, few file formats are as simultaneously ubiquitous and inaccessible as the AT9 format. For gamers familiar with the PlayStation Vita, PlayStation 4, or PlayStation 3, the .at9 file extension is a common sight lurking within the directories of their favorite titles. However, without the right utility, these files are nothing more than locked boxes of data. at9tool.exe
: It is a staple tool for the PS Vita homebrew community, often used to create custom themes by converting background music into the necessary .at9 format. ) into the compressed ATRAC9 format used by
| Error Message | Probable Cause | Solution | | :--- | :--- | :--- | | Failed to open input file | File path contains spaces or is read-only | Use quotes: at9tool.exe -d "C:\My Files\song.at9" out.wav | | Unsupported sample rate | AT9 requires specific rates (44.1k, 48k, 96k) | Resample your WAV to 44.1 kHz or 48 kHz in Audacity first | | Bitrate out of range | AT9 has a minimum bitrate (24 kbps for mono) | Use -b 64 or higher | | Corrupted AT9 header | The file is encrypted or from a PS4 PKG | Use a decryption tool like PS4 PKG Tool before running AT9Tool | However, without the right utility, these files are
or simply run it with no arguments to see the usage summary.
