Back to the Future ttarch by Bladeforce at 3:15 PM EST on December 23, 2010
Is it possible to open the game music files. They have a format .ttarch I am presuming the tt stands for telltale the company that makes the game. Any idea if this is possible to open?
There is a member of a fan community that knows how to open the newer versions of ttarch files. TellTale requested nicely that he doesn't release it and he complied. To my knowledge no one else has worked on it.
Based on my very rudimentary preliminary observations, I'm inclined to believe that the file linked on mediafire (see above post) is either the wrong file (in truth, I don't expect this to be the case), or the music is likely sequenced. Using the tool on aLuigi's site, I get over 760 files, all with *.aud extension. Only 4 of these are ~1 MB or more (the largest is just over 2 MB).
I should point out that the tool requires that you select what game you want to extract. BttF is not among the selectable games, so I tried #39 and #40 (I figured they were the 2 most recent ones, so they might work). Thus, the resulting files could be extracted wrong, and thus won't play in Winamp.
They could also be an unsupported streamed format, which would also be why they don't play. However, considering the file sizes we're dealing with, I would be a little surprised if there's much streamed music here. Perhaps it's in pieces/cut up, allowing it to be "dynamic", and the game pieces it together as you play.
Anyway, in its current form, the files are not playable. If they are streamed (and not sequenced), then it's still possible someone will be able to look at the files, and add support in VGMstream for them. Hopefully this happens, because I love BttF (I would have bought/preordered the game, if I had had the money to do so). Mouser X over and out.
Reason its unextractable, is because you need the encryption keys. To get the keys, you need to dig around in the game executable to reverse engineer them. Hopefully the copy protection isn't too hindering...
TTARCH uses a modified Blowfish algorithm for encryption, so the protection changes with each game. And so if you get a wrong encryption key, you get wrongly decrypted data.
edited 9:46 PM EST December 24, 2010
by headerless at 12:52 AM EST on December 25, 2010
wrong key = bad data? who'd have thought, right? good thing mudlord knows what he is doing and that encryption requires the right key, without him we'd all be lost.