At9tool.exe ⟶

(Here, -e stands for encode, and -br sets the bitrate).

: Converts standard .wav files into .at9 format for use in PlayStation software . Common Usage Commands

To understand the tool, one must understand the codec it handles: at9tool.exe

This tool is often part of official Sony SDKs but is widely distributed in "modding starter kits" for PlayStation platforms .

: Reverses the compression process, extracting the .at9 asset back into an editable .wav layout. Game preservationists and asset rippers rely heavily on this functionality to listen to game sound effects or music on a PC. Fundamental Syntax and Commands (Here, -e stands for encode, and -br sets the bitrate)

To convert an existing game audio file into a playable .wav format, use the -d (decode) flag: at9tool.exe -d input.at9 output.wav Example: at9tool.exe -d bgm_01.at9 music.wav 2. Encoding (.wav to .at9)

The core executable at9tool.exe relies on a command-line interface (CLI). It requires specific flags and arguments to accurately structure bitrates, sampling rates, and looping coordinates. Basic System Prerequisites : Reverses the compression process, extracting the

Use cd to change directories to your working folder (e.g., cd C:\Users\Username\Desktop\AudioFiles ).

While at9tool.exe was created strictly for licensed Sony developers, it has become well-known within the video game modding, emulation, and homebrew communities.

The basic syntax follows standard CLI conventions: