[introduction goes here]
About the effects [in your order]:
Rate Up Lv.5 — boosts the increase of Voltage Rate for each Rate Up Note [10% without the effect, 15% with it].
12-sec Rate Up — simply increases Voltage Rate by 1% every 12 seconds.
Rate Up Catcher — triggers Rate Up Notes' effect even if they are MISSed.
Rate Up Plus Lv. n — increases the number of Rate Up notes for the request duration.
[I tested this with Lv. 4 and that gave a bump from 10 notes regularly to 14 with this effect.]
Hope that clears it up.