They probably found some kind of loophole to use it, that or roblox cant figure it out due to it being in another language, which would be kinda crazy.
It def isnt impossible, but its def unlikely
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The game has been removed before due to copyright issues. However, it was restored. Since then, Roblox has not imposed any sanctions. It is also possible that Roblox is “intentionally” not sanctioning it for reasons that benefit Roblox.
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they slow down the song with copyright and when the moderation in the game passes they put it at the normal speed of the song
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maybe they have the rights 
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I wish it were that simple, but you have to submit those to the company that Roblox uses to filter the music, then afterwards, you can upload your music without copyright issues. Coming from my personal experience with Roblox music moderation. 
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There are two things I think might happen:
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They could be using some sort of “copyright” bypass method, most likely by uploading a slowed-down song that Audible Magic, which Roblox uses, has significant issues with (as do most audio fingerprint services). They then take this slowed-down audio asset and change the tempo to match the original. Does this mean they’re going to get banned instantly? No. For a game to be removed for copyright infringement, a copyright holder needs to manually submit a notification to Roblox.
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They might have obtained a license and cleared the audio asset. This is possible by emailing songclearance@roblox.com with the moderated asset ID and a license they may have paid for. Licenses for Roblox games typically cost between $15 and $300.
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doesnt mean they cant still get the rights
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Probably not. It plays almost all the famous K-POP songs, including famous pop songs like Ed Sheeran and Avicii, and since it is a Korean game, it also plays new K-POP songs. Also, when new K-POP songs come out, they immediately add them and update the game. That’s too much music for the developer of this game to have all the rights.
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I was wondering about that too. Why would a Roblox game need to be so connected to your computer…?
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I found out today that if I upload music with a different pitch and tempo than the original, it won’t be censored. And I found out that I can adjust the tempo and pitch of the music to the original in the studio.
However, using this method, not only is the pitch not completely accurate to the original, but the sound quality is also noticeably distorted compared to the original. This doesn’t seem to be the case with the karaoke game I suggested.
Is this the wrong way to do it? Or did I test something wrong?
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Oh and I got another reply from Roblox today, but again, I got a short and stupid reply saying “You can use licensed music from Toolbox”.
Full text of the email:
Hi Bin,
Thank you for contacting Customer Support regarding using copyrighted music on Roblox.
Users are able to include Licensed Music that is available through Studio in their Experiences. Check out our help article for more information on how to use Licensed Music on Roblox.
Sincerely,
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Maybe they reverse pitch shifted the audio using the instance?
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I just checked the related reverse articles. Originally, Roblox officially supported a feature where you could reverse the playback by setting the PlaybackSpeed value to a negative number, but that feature was removed due to copyright and inappropriate audio issues. So you can implement reverse with a little bit of coding, but it is very laggy and you have to find the right reverse delay time for each song. So this is most likely not the way to go.
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Do you need to change the pitch and tempo to bypass the audio or can you just change the pitch? If so, someone could reverse the pitch change in studio with this PitchShiftSoundEffect | Documentation - Roblox Creator Hub. And is there actually no better way to change the tempo?
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I’m currently experimenting with reducing the pitch and speed of the original music with a music program called FL STUDIO to avoid censorship and upload it to Roblox, then adjusting the Playbackspeed value in Roblox Studio to return it to the original speed, and using the PitchShiftSoundEffect object to change the distorted pitch to 1/(original pitch * pitch modified by Playbackspeed) to see if this works.
I’ll let you know when the results come out.
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I tried it and some of the more famous songs were censored even when the pitch and tempo were changed. But that karaoke game has hundreds of songs like that. The sound quality is too good to be using all of them with the pitch and tempo changed.
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Changing the tempo and pitch shouldn’t effect the quality but idk… I might try it… Or not because I don’t want to risk getting my account moderated.
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That’s right. I got a warning during the experiment, so I’m going to stop doing this. And the reason why the sound quality is lowered by the pitch and tempo is that when Roblox increases the sound speed, the pitch increases as well. So we need to lower the pitch separately. The process of adjusting the pitch object is not to adjust the pitch of the original, but to change the pitch again by adding the pitch transformed into PlaybackSpeed, so the sound quality seems to deteriorate because the frequency is different from the original
Imma bump this post cause it’s really interesting and I think I know how they bypass their music from copyright and I think it’s pretty clever.
They usually download the music from YouTube lyrics video as far as I know because I’ve noticed that one of their songs had unintentional intro sound before the actual music, pretty hilarious.
Then they chop that music into individual audio clips preferably every 7-10 seconds using audio editor software. Then they upload those audios clips into Roblox with a low chance of them getting copyrighted. I assume Roblox doesn’t copyright audios that are above 10 seconds maybe that’s why.
Then they have a pretty clever system in-game that automatically connects those audio clips to form the original music. This is done by connecting multiple Sound altogether using crossfade.
How did I know this? My internet was laggy and I noticed that the sounds sometimes cuts off when my internet is buffering.
I wouldn’t recommend reproducing this method. Copyright is a serious thing.
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