ROM Hack How can I inject my own audio into .bcsar files?

[dj505]

I'm trying to modify one of the Nintendo demo video apps (just for fun) and the audio is stored in a .bcsar file. Is there any way I can open the file to extract the audio, or inject my own?

EDIT: I found this, but the download link seems to be dead.

 

[HelpTheWretched]

The program I've used is called 3DS Audio Ripper, it's pretty simple. I did a quick search and didn't find a link, so I'm attaching the file for you here. A BCSar can contain several kinds of files, and sounds are typically CWAV.

You could also extract them with a hex editor - just search the BCSar file for a "CWAV" header and copy everything up until the next header.

As for injecting your own audio: It's possible, also using a hex editor, but there's a good chance that your custom CWAV will need to be exactly the same file size as the one you want to replace. That's because it seems that games/apps refer to sounds in the BCSar by their location, not by name. You'll also need a program to convert your sound files to CWAV, which can be extremely hard to find outside of Nintendo devkit software...

 

[dj505]

The program I've used is called 3DS Audio Ripper, it's pretty simple. I did a quick search and didn't find a link, so I'm attaching the file for you here. A BCSar can contain several kinds of files, and sounds are typically CWAV.

You could also extract them with a hex editor - just search the BCSar file for a "CWAV" header and copy everything up until the next header.

As for injecting your own audio: It's possible, also using a hex editor, but there's a good chance that your custom CWAV will need to be exactly the same file size as the one you want to replace. That's because it seems that games/apps refer to sounds in the BCSar by their location, not by name. You'll also need a program to convert your sound files to CWAV, which can be extremely hard to find outside of Nintendo devkit software...

Thanks! This is exactly what I needed!

 

[HelpTheWretched]

If you can't find a WAV > CWAV converter, I've got enough free time to convert a couple for you... I'll just need to know the exact number of bytes of the one(s) you're replacing.

 

[VectorX]

Can you please convert the original fire temple wav for me?

 

[TopCape]

Can you please convert the original fire temple wav for me?

This tool can convert .WAV to .BCWAV (this specific version only from what I understand): It is called LoopingAudioConverter and it is in github, specifically the tag v2.3.1-rstmcpp, which is a pre-release, has this feature.

Also, I don't know your intent with wanting that converted but in case it has to do with restoring the original fire temple music, it is already done (please read NOTE part inside): It is available in gamebanana by the name Original Fire Temple Chanting (with the end of the url being /sounds/51786)

PS: I cannot post links because I just made this account