You can run at9tool.exe from the Command Prompt (CMD). The basic syntax for its two primary functions is as follows:
Command-line only; requires technical knowledge or a separate GUI. Versatility Only useful for Sony ATRAC formats (AT3/AT9). Availability Gray Market
| 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) | at9tool.exe
**Error: "Invalid
at9tool.exe -t -s data.txt -d device:/path/to/destination You can run at9tool
| Tool | Description | |------|-------------| | | Converts between many game audio formats ( .at9 , .adx , .hca , etc.). CLI + GUI. | | vgmstream | Plugin for playback/conversion. Supports looping. | | FFmpeg (with libavcodec ATRAC9) | Since 2020, FFmpeg can decode ATRAC9 (but encoding is not officially supported). | | foobar2000 + foo_input_vgmstream | Best for listening/testing .at9 files. |
A specialized script often used for batch-converting files for specific games like Persona 4 Golden at9tool.exe Availability Gray Market | Feature | Details |
directly because it requires typing complex commands. Instead, they use "GUIs" (Graphical User Interfaces) that make it easier: ATRACTool-Reloaded A popular open-source tool on
: Developers can use it to inspect the bitrate and channel information of existing game assets. How to Use at9tool.exe