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by Infernus Animositas at 9:12 AM EST on January 5, 2018
El Shaddai uses an early version of HCA and is also not encrypted with a key.

These .AAX files can be decoded using one of the earlier HCA decoders called HCA2WAV. You'll probably need to strip some extra header data from the .AAX files first though but it would be nice to have the functionality added to vgmstream.
by bnnm at 9:15 AM EST on January 5, 2018
The .AAX concat 2 HCA, this isn't supported in vgmstream yet (I hope to in the future). You can extract those 2 HCA though, the X360 set already does.

Then if you play you'll get muffled audio. That's because it uses an early version of HCA, which vgmstream's HCA decoder can't do either.
You can use VGAudio to properly convert.
(a reason to port to C in the future I guess)
by bxaimc at 10:40 AM EST on January 5, 2018
Aye, Binary Domain uses the same setup. And then you have that complicated mess in Street Fighter x Tekken that uses a individual hca stream per channel.

edited 11:00 AM EST January 5, 2018
by punk7890-2 at 6:44 PM EST on January 5, 2018
Thanks for the help. However I don't understand how to get VGAudio working and it seems like HCA2WAV only converts one file at a time.
by Infernus Animositas at 12:07 PM EST on January 6, 2018
Save the following text in notepad with the file extension ".bat" for multiple conversions with HCA2WAV

for %%i in (*.hca) DO hca2wav.exe "%%i" "%%i".wav

edited 12:07 PM EST January 6, 2018
by furrybob at 1:04 AM EST on January 7, 2018
To use VGAudio to decode an HCA file, do something like this: vgaudiocli.exe in.hca out.wav

For batch conversion: vgaudiocli.exe -b -i <folder with hca files> -o <destination folder> --out-format wav
by punk7890-2 at 7:01 AM EST on January 7, 2018
Thanks for the tips guys. I'll try it out soon.
by bnnm at 1:27 PM EDT on September 8, 2018
Just heads up that HCA/AAX now decode properly in vgmstream, including El Shaddai
by Runy93 at 3:04 PM EDT on October 20, 2018
any one have the latest cri ADX2 ??
by GoofyMaster24 at 10:27 PM EST on November 25, 2018
Does someone know how to get the new HCA decryption keys for Ryu Ga Gotoku Online?
The game was released recently for PC/Android/iOS and it's based on Unity.

HCA files from the game

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