I'm still familiarizing myself with CHOPs, and one thing is (no pun intended) vexing me: how do I actually write a value to a channel? I've got a Phoneme CHOP set up, and I've got character blend shape channels corresponding to some of the phonemes, but I haven't figured out how to convert the Phoneme (a float value where each integer is a different phoneme) to a value of 1 on the appropriate blend shape, e.g. Phoneme 4 to blendshape EH. Nothing I've tried so far has worked to affect the value of any of the channels in any way. What am I missing here?