I just found a good video on wiggle here:
the short answer is it’s got a frequency and amplitude. time() is the frequency in PB, and amplitude is how much you want to multiply the 0…1 by…
The real meat though is that it’s more of a Perlin/Simplex noise-style changing change, it’s a SMOOTH change, not a random change…
So we’ve got some noise functions in usercode, but it’s not fleshed out into a library (yet). On my todo list.
Adding a noise() into the function list would make sense though.