Update: I just did a manual cast. Still getting there error.
Here's the new argument lists:
(void**, const(PaStreamParameters*), const(PaStreamParameters*),
double, uint, uint, extern (C) int function(const(void)*, void*,
uint, const(PaStreamCallbackTimeInfo)*, uint, void*), void*)
(void**, const(PaStreamParameters*), const(PaStreamParameters*),
double, uint, uint, extern (C) int function(const(void)*, void*,
uint, const(PaStreamCallbackTimeInfo)*, uint, void*), void*)
They're identical... unless I'm losing my mind. Yet still its
"not callable using argument types"