Perhaps it could also be used as a therapeutic tool. One could train with it in order to reduce the affective threshold at which one detects emotion.
Interesting idea. If software like this can smoothly adjust intensity, you could find the threshold at which you can reliably detect it, and attempt to push that downward to pick up more subtlety.
http://iniciativadebate.org/2016/01/22/por-que-solo-en-video...
In the first video (at around 0:33) you can see the voice as if it was applied the "scared" filter too much, and cutting only the section where she says "yes, we met with X" out of context to make it sound like a shameful confession instead of the firm statement of known information that it is (0:41 of second video).
