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Read guide →If you have ever extracted sound files from a PlayStation 4 or PlayStation Vita game, or worked with audio for the PS4, PS5, or PS Vita homebrew, you have likely encountered .at9 files. at9tool.exe is the official (or officially reverse-engineered) tool to create these files from standard PCM (WAV) inputs.
@echo off for %%f in (*.wav) do ( echo Encoding %%f ... at9tool.exe -e -b 96 "%%f" "%%~nf.at9" ) echo Done. Save as encode_all.bat in the same folder as your WAVs and at9tool.exe . Run it. at9tool.exe is a small but crucial piece of the PlayStation audio ecosystem. For hobbyists, modders, and homebrew developers, it is the most accessible gateway to creating compatible AT9 audio for PS Vita, PS4, and PS5 projects. While its proprietary nature and command-line interface may be intimidating, its straightforward syntax and efficient compression make it an invaluable tool.
1. Introduction In the world of digital audio compression, codecs like MP3, AAC, and OGG Vorbis dominate the consumer landscape. However, within specific niches—particularly video game development, modding, and emulation—proprietary and highly specialized codecs reign supreme. One such tool is at9tool.exe . This command-line utility is the primary encoder for the AT9 audio codec , a format developed by Sony Interactive Entertainment.
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If you have ever extracted sound files from a PlayStation 4 or PlayStation Vita game, or worked with audio for the PS4, PS5, or PS Vita homebrew, you have likely encountered .at9 files. at9tool.exe is the official (or officially reverse-engineered) tool to create these files from standard PCM (WAV) inputs.
@echo off for %%f in (*.wav) do ( echo Encoding %%f ... at9tool.exe -e -b 96 "%%f" "%%~nf.at9" ) echo Done. Save as encode_all.bat in the same folder as your WAVs and at9tool.exe . Run it. at9tool.exe is a small but crucial piece of the PlayStation audio ecosystem. For hobbyists, modders, and homebrew developers, it is the most accessible gateway to creating compatible AT9 audio for PS Vita, PS4, and PS5 projects. While its proprietary nature and command-line interface may be intimidating, its straightforward syntax and efficient compression make it an invaluable tool. at9tool.exe
1. Introduction In the world of digital audio compression, codecs like MP3, AAC, and OGG Vorbis dominate the consumer landscape. However, within specific niches—particularly video game development, modding, and emulation—proprietary and highly specialized codecs reign supreme. One such tool is at9tool.exe . This command-line utility is the primary encoder for the AT9 audio codec , a format developed by Sony Interactive Entertainment. If you have ever extracted sound files from
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