maimai-er

I would just play Festival Plus with omnimix, which includes almost every deleted song... If you want to experience the old user interface, I saw there are some people copying the assets files from old version dump to game folder

Do you mean the "fake" 1.35 ? (which is basically 1.30 with some OPT inside) If it is the case, you can just use the 1.30 segatools. I don't think 1.35 is leaked on the public internet for now.

I am fixing this by setting Is8ch = 1 in mai2.ini , so the game would take exclusive control of the audio device, which should theoretically cause less latency

Is torrenting the downloaded files an option?