CHOP operators transport channels of realtime data, organised in samples. CHOPS can be Time Sliced which means you see only the state of the signal at this moment (frame number). The Trail CHOP shows you the signal over a longer time, per default four seconds (which makes at 60 frames per second 240 frames and resulting 240 samples).
A Constant CHOP allows us to manually set a value which we can animate with the Speed CHOP.
We later replace the Constant CHOP with a Parameter CHOP which delivers us the parents parameters.
The Select CHOP helps us to single out channels, whose value ranges can be adapted with the Math CHOP to the destinations needs.