About the drumroll in a 1/3 song :
http://osu.ppy.sh/b/123616&m=1 I made a trick in this map to do so.
Let's make an example with 200 BPM, SV 1.0 (Examples with these numbers to get a better accuracy in numbers and mental calculus sdgadfsfa)
First, you have a 1/4 roll at 200 BPM, which gives 800 instead of 600. 600 1/1 in 1/4 gives 150 BPM. (Which is 0,75×the original BPM.)
Problem is, your scroll is not 200 anymore since you dropped by 0,25x, but you want to give the illusion it's STILL 200 BPM.
Scroll drops from 200 to 150 => 3/4. To go from 150 to 200, you'll need to use the INVERSE of 3/4 which is 4/3 or 1,3333333× the new bpm.
With SV 1,0 it will give 1,333333333
With SV 1,4 it will give 1,866666667
With SV 1,6 it will give 2,133333333
(You can still edit the osz file to get a better accuracy.)
You have one problem which is easily solvable, it's the measure bug, put 3/4 (if it's a 4/4 song)
If it's a 3/4 song... It's very hard. D: better put BPM ×3 and put time signature 9/4 LOL
http://osu.ppy.sh/b/123616&m=1 I made a trick in this map to do so.
Let's make an example with 200 BPM, SV 1.0 (Examples with these numbers to get a better accuracy in numbers and mental calculus sdgadfsfa)
First, you have a 1/4 roll at 200 BPM, which gives 800 instead of 600. 600 1/1 in 1/4 gives 150 BPM. (Which is 0,75×the original BPM.)
Problem is, your scroll is not 200 anymore since you dropped by 0,25x, but you want to give the illusion it's STILL 200 BPM.
Scroll drops from 200 to 150 => 3/4. To go from 150 to 200, you'll need to use the INVERSE of 3/4 which is 4/3 or 1,3333333× the new bpm.
With SV 1,0 it will give 1,333333333
With SV 1,4 it will give 1,866666667
With SV 1,6 it will give 2,133333333
(You can still edit the osz file to get a better accuracy.)
You have one problem which is easily solvable, it's the measure bug, put 3/4 (if it's a 4/4 song)
If it's a 3/4 song... It's very hard. D: better put BPM ×3 and put time signature 9/4 LOL