At9tool.exe

For video games, background music often needs to loop seamlessly. at9tool.exe allows embedding loop points directly into the file header.

: Windows (x64 architecture required for most modern compiler builds). Linux users must run it through compatibility layers like Wine .

XyLe-GBP/ATRACTool: Utility tool to convert Sony's ... - GitHub

: Converts .at9 files into standard .wav files for playback or editing on a PC . at9tool.exe

format. Primarily a developer-facing tool, it is widely used by game modders and hobbyists working with PlayStation hardware. Core Functionality

Troubleshooting

| Feature | Details | |---------|---------| | | Perceptual transform coding (MDCT + Huffman) | | Sampling rates | 8 kHz – 48 kHz (typically 44.1 kHz or 48 kHz in games) | | Bitrates | 16 kbps – 320 kbps (common: 64, 128, 256 kbps) | | Channels | Mono, Stereo, 5.1 | | Low latency | Yes – designed for real-time game audio | | Looping | Built-in seamless loop support (essential for background music) | | Container | Usually raw .at9 or inside .awb (CRI Atom) or .psarc (PS4) | For video games, background music often needs to

: Use the -e flag, and you can specify the bitrate with the -br flag. The default bitrate for the best quality single-channel audio is 96 , but some games may use 60 for a smaller file size.

format for use as background music (BGM) or sound effects in PlayStation games and custom themes. files back into editable Looping Support: Includes specific flags, such as -wholeloop

Licensing and compatibility

In the context of game modding (like adding custom music or voice-overs to games like Persona 4 Golden ), it is a standard and necessary tool. Security Caution:

audio format. It is an essential tool for developers and enthusiasts working with audio for the PlayStation Vita PlayStation 4 Core Functionality