ROM Hack Replacing audio in games

[mishydishy]

As you all know, the Osu! and Elite Beat Agents games contain licensed soundtracks, but all the songs are down by extremely inferior (to the original) cover artists. I'm curious as to how one can replace the songs with the originals (I already have copies of all the songs). Considering the songs use the same beats and tempo, I don't think it will change the gameplay.
Depending on how hard/easy it is to do such a thing, I may do it and I may not.

 

[Snooby]

that sounds like a very good idea

I would also be happy if someone could find out a way to do this!

 

[chuckstudios]

The difficult part of this is that OTO/EBA stores songs as fragments, and pieces them together to avoid redundancy. Therefore, something like the chorus would only be stored once, and it would know to play that fragment at 0:37, 1:41, etc. AFAIK no one has figured out how it actually does this or where to change it.

 

[kesadisan]

actually all the song on Ouendan and EBA was all cover song, it was cutted, and 100% will off the beat when you replace it with full song

 

[mishydishy]

@kesadisn:
I am aware that they were all cover songs, as I stated in my original post. Also, I don't think they are cut, as when I am listening, my (musically untrained) ears cannot discern any difference that will cause it to be 100% off-beat.
@chuckstudios:
Is it possible to just cut the original in the same manner and replace the fragments with other fragments?

 

[ShakeBunny]

This is a very good idea. Hope this works out.

 

[kesadisan]

@mishydishy:
try to hear Pop Star song on Ouendan 2 and hear it on full song
you'll see the differences
need more?
Hear Shonen Heart too
or COUNTDOWN

i'm sure you'll understand

 

[mishydishy]

No offense, but I don't see any differences enough in the beats to change the gameplay of ouendan.