4th Note[]
4th notes are represented by a red arrow. These are the most common in the game since they represent whole beats. They're the numbers in 1 & 2 & 3 & 4 &.
8th Note[]
8th notes (2x faster than 4th notes) are represented by blue arrows and are almost as equally as common as 4th notes. They're the &s in 1 & 2 & 3 & 4 &.
12th Note[]
12th notes (1.5x faster than 8th notes) are represented by purple arrows. These types of notes are commonly used in polyrhythms and are used to create 12 beats instead of 8 in one measure (4/4 time signature).
16th Note[]
16th notes (2x faster than 8th notes) are represented by yellow arrows and are very commonly used in streams and jumpstreams. They're the e, a in 1 e & a 2 e & a 3 e & a 4 e & a.
24th Note[]
24th notes (2x faster than 12th notes) are represented by pink arrows. They provide the same function as 12th arrows, only two times faster (24 beats per measure in 4/4 time signature).
32nd Note[]
32nd notes (2x faster than 16th notes) are represented by red-orange arrows. These aren't very common and can make for some very nasty patterns in the game. They're the .s in 1.e.&.a.2.e.&.a.3.e.&.a.4.e.&.a.
48th Note[]
48th notes (2x faster than 24th notes) are represented by turquoise arrows. The main application of these are being grace notes. If not used as a grace note, 48th notes can be very fast (48 beats per measure in 4/4 time signature).
64th Note[]
64th notes (2x faster than 32nd notes) are represented by green arrows. These are mainly used as grace notes as well, but if not used as a grace note, 64th notes can be brutally fast. They're the 's in 1'.'e'.'&'.'a'.'2'.'e'.'&'.'a'.'3'.'e'.'&'.'a'.'4' .'e'.'&'.'a'.'.
192nd Note[]
192nd notes (4x faster than 48th notes) are represented by white arrows. The primary purpose of 192nd notes are for voice-stepping and grace notes. Some step artists use 192nd notes as a technique to make their stepfile look more colorful (e.g. Counting Snow), but for the most part they're the same thing as the note they're the closest to.