I've always thought DT or HT would never change OD (or more precisely, hit windows) in osu!mania.
However, today I find something interesting.
In a map with OD 7.7, the hit window of 300 becomes longer (41ms to 40.5ms) in DT. It is even longer than HT. In a OD 7.8 map, the hit window of 300 becomes shorter in DT, but hit windows of 200, 100 and 50 are still longer(and shorter in HT).
Is there a formula for the hit window change, or...it's just a bug in osu?
![](https://i.ppy.sh/dc8dbfa536d7de068fca24f66487388554bcd33f/68747470733a2f2f7777772e68326e6e612e6d6c2f53656372657447617264656e2f31334645394438343331304537374631334136443138344442463132333246332f4f44372e372d372e382e706e67)
However, today I find something interesting.
In a map with OD 7.7, the hit window of 300 becomes longer (41ms to 40.5ms) in DT. It is even longer than HT. In a OD 7.8 map, the hit window of 300 becomes shorter in DT, but hit windows of 200, 100 and 50 are still longer(and shorter in HT).
Is there a formula for the hit window change, or...it's just a bug in osu?