Sane

http://jammersbase.ath.cx/download?filename=o2ma100.ojn

This is for a game I play. These files contain all the information for the individual songs you can play in the game.

I've done some work in the hex editor to figure out how to find certain general attributes of the song, but I have got nowhere trying to decode the actual notes.

If someone has the time to help me, please add me at drsane_@hotmail.com as I assume this will be an indepth process of comparing the desired result with the binary file. If the process is complicated enough, I will of course offer money to those who help.

All help is greatly appreciated.

By the way, this is not for anything illegal or abusive. I'm designing a program that will draw a chart of the notes in the song for people to download from my website for help.

DaWei

If the file is playable music (it could be some other encoding scheme), you aren't going to be able to pick notes from binary values alone. After all, it could be a chord. If it's playable music you'll just need to do frequency analysis. I don't download unknown stuff, so I don't know what kind of file it is.

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Sane

No. Sorry if I gave the wrong impression.

Each song is broken up into three files
> Graphics
> Music
> Notes

This is the Notes file. It contains the keys you must hit while the music plays (this is a rhythm game, much like DDR or IIDX).

It should be fairly easy to extract which notes should be played, since the game must do it every time you play a song. And other people before me have made similar programs.

DaWei

This is a quote I found through Google. I can't vouch for diddly squat.

__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
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Sane

Yep, that's one of my references when I said someone's done this already.

But that is in a realtime output. I want to basically remake it as a LEGAL program (yes, that program is illegal for copyright infringement), and have it ouput as a still image.

Good find though, heh.

Arevos

You could try playing songs with certain notes, and then seeing how the output changes. Beyond that, I couldn't hazard a guess.

Sane

Yeah exactly Arevos.

"If someone has the time to help me, please add me at drsane_@hotmail.com as I assume this will be an indepth process of comparing the desired result with the binary file."

>_>;;

Arevos

Missed that part :o

Sane

Okay. I'm starting to get much more desperate. If I can't get it soon I think I might offer around $30 for someone's help.

andro

Best I found out is that you can unpack it using a program called Dragon Unpacker, and you get 2 files. A .bmp with the song name or something on it, and a .669 file. You can open the .669 file with Modplug Tracker or something like that, anything that plays MOD files I guess. You can view a pattern using Modplug Tracker, but I have no idea what it means.