this post was submitted on 16 Oct 2023
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Even with open source software, there would still need to be license to use the music and that is expiring
This is a prime case for the abolition of intellectual property rights.
3rd party rhythm games are usually dont ask dont tell about how they source their songs.
Osu is a taiko no tatsujin, Beatmania, Elite Beat Agents, O2Jam, DDR, DJMax clone. Clone Hero is a rock band/Guitar hero clone, and the list goes on.
They will generally pack a few songs that were given to them for use, but the rest is on the users
Oh yeah, I've played one or two of those. How many of them are open source?
osus source code i think is public, clone heros not that im aware of. different games will have varying levels of openess. all will share that adding official songs into the game is the least of their efforts, as thats more on the community to build.
I mean, could one source the music from a streaming service or YouTube (provided that the user has a subscription)?
no, because they don't provide the stems, only the finished tracks
This is a prime use case for some quality open source software. Analyze audio, separate tracks, generate playing instructions for tracks.
what software can reliably generate stems from finished tracks? and will it still sound the same when you mix them back together?
I don't know if any exists. But it's theoretically possible and I think going from separated track to stems might be one of the easier parts (thanks Fourier!), though complicated by most notes appearing on each string in different places, but I bet there's an algorithm (again possible, not necessarily currently existing) for determining one of the easiest combinations to play rather than having to jump all over the fretboard.
As for sounding the same, you'd need to recreate the guitar effects used, and then it can be mixed back with the other tracks. Easier said than done, but I suspect this part does exist, though maybe not as open source.
Apologies if that wording should only be used for things one can download and use right now rather than a cool project idea I hope gets created. I might even give it a go, but I'm least confident about the track seperation part.