This app automatically generates negative speed effects in osu!mania!
Paste the contents of an .osu file into the Input box. The app will generate a new difficulty where all timing points with Kiai Mode enabled are interpreted as negative speeds.
Input
Output
Feel free to contact me at Niv#3724 on Discord or Nivrad00 on osu! for bug fixes and feature requests. Source code is available here if you would like to make your own changes :)
Known limitations:
Check out this map for an example of what can be done using this tool:
The Breakbeat Junkie vs DJP - Hit me with the horns (Express Cut) [dragon.gif]