At9tool.exe !!top!! Page

: An updated GUI-based version that supports advanced features like loop point configuration .

If you have ever ventured into the world of PlayStation modding, custom themes, or game development, you have likely encountered files ending in .at9 . These files contain ATRAC9 audio, a proprietary compression format developed by Sony. To create or manipulate these files, developers and hobbyists rely on a specific command-line utility: .

**Error: "Invalid

@echo off mkdir wav_out for %%f in (*.at9) do ( at9tool.exe -d "%%f" "wav_out\%%~nf.wav" ) pause Use code with caution. System Dependencies and Prerequisites

at9tool.exe -e -br 96 -l 44100 882000 "looping_track.wav" "looping_track.at9" Use code with caution. at9tool.exe

The source .wav file is likely saved in a 24-bit or 32-bit float format.

To convert a standard audio file for use in a game or theme, use the -e (encode) flag: : An updated GUI-based version that supports advanced

is a command-line utility from Sony, primarily used for encoding and decoding audio in the ATRAC9 (.at9) format. It is a staple tool in the game modding and homebrew communities for consoles like the PlayStation Vita, PS3, and PS4. Key Features & Use Cases

In this example, the track will play normally until it hits sample 882,000, at which point it loops back seamlessly to sample 44,100. How to Decode AT9 back to WAV To create or manipulate these files, developers and

at9tool.exe -d input.at9 output.wav

FFMPEG generally cannot encode ATRAC9 due to proprietary licensing. It can sometimes decode it, but artifacts are common. at9tool.exe remains the only reliable way to create verified audio assets for PlayStation builds.