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by Tsuellimac at 10:57 PM EDT on October 30, 2021
I would like to extract the Music from "Super Robot Taisen 30" that I purchased on STEAM, but the HCA file seems to be encrypted and I am having a hard time decoding it correctly.
When I open it in a binary editor, the header is HCA, and when I open it in foobar2000, it recognizes the length of the song, but when I try to play it, it doesn't decode properly and only plays strange sounds.
Please tell me how to get the key to decrypt the HCA.

These are the HCA files that are encrypted and the files that seem to be related to them.
https://mega.nz/file/vaRkiLqa#BJ_f3tTRU3vxnf5AeUP6PIchbGgegkMaRcCpKxy7cBI

Thank you.
Tekken 8 Beta by SirVH2 at 7:22 PM EDT on October 23, 2023
I'm trying to discover the USM keys for Tekken 8 PC Beta.

Executable:
https://www.mediafire.com/file/if3gc5welsf6dc0/Polaris-Win64-Shipping.7z/file
Super Mario RPG Remake by MonicaAnon at 9:23 PM EST on November 10, 2023
Looking for some help with Super Mario RPG's sounds.

https://www.mediafire.com/file/tbdzp3kel5tqhqi/RomFSAudio.zip/file

Those are the files and I have no idea what to even do to get the subkey (if needed) for it. Searching brings me either here or Xentax (rip).

Some notes in the header
* Tool Ver. : Ver.3.48.02
* ACB Ver. : Ver.1.40.0

So no idea if that helps.

edited 9:23 PM EST November 10, 2023
Washing Game by stdpi at 3:47 PM EST on February 9, 2024
Need help, where I have lots of hca and adx which should have funny sound, but using so many tools, no avail.

Sample file:
https://files.catbox.moe/l9ze0x.hca
(which I tried so many toys but only noise, no funny sound)
https://files.catbox.moe/nbh62h.adx
(not priority but clues in hexdump leads here)

Dumped key: 0x7F4551499DF55E68

And seemingly, the interface of intergeration should look exactly like this where the key is in string-ed uint64: https://www.criware.com/en/products/images/adx2_06.jpg

Also, there is "Auth file name" which lead to https://files.catbox.moe/joowc9.dat

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