How to play rapid-fire songs like 'Lost Intense Machine Gun'

First, it's important to know the rhythm of the rapid-fire sections. Most of the time it's 16th notes, but... In the case of 'Kagayaki' Expert, the rapid-fire sections after combo 794 are 12th notes. Don't you get it? 'Hatsune Miku's Kagayaki' is a 4/4 time signature song. If you listen to Miku's voice in the section after combo 794... She pronounces 12 times per measure. In the section after combo 993, she pronounces 16 times per measure. It's a shame that Proseka doesn't have measure lines. If you just mash buttons without knowing this rhythm and speed, your accuracy will inevitably be off. Also, there's a trick for 'Kagayaki' and 'Lost' Expert... The horizontal width of notes in Proseka is wider than it looks. In rapid-fire sections where notes come down on 4 lanes, if you try to hit the notes between lanes 1/2 and 3/4, it's said that you can surprisingly pass them, assuming the rhythm is correct...