What does ↑ and ↓ mean?

[GGuotter_Dok]

I've been trying to figure out what " ↑ " or " ↓ " means. i know its for higher notes but I don't know if its for growls or just singing in C5~F5

(the image is from an UST of Lost one's weeping)

 

[Halo]

It's to switch between the pitches for some voicebanks that have recorded just an upper and lower pitch besides their main default pitch (so not multipitch vbs, just sort of one generally higher and one generally lower). up arrow for higher pitch, down arrow for lower pitch. The pitch of these pitches can be anything depending on the voicer and voice type and when then VB was made.

They wont work with VBs that don't have these suffixes; you can just remove them with suffixbroker.