Summa

Describe the bug
According to https://github.com/mumble-voip/mumble/blob/d6f9e97ad64828066d5134c9d87e2673847eed79/src/mumble/ServerHandler.cpp#L557

the third true parameter essentially disable the TCP mode check here: https://github.com/mumble-voip/mumble/blob/d6f9e97ad64828066d5134c9d87e2673847eed79/src/mumble/ServerHandler.cpp#L277

Which in this case, client keeps sending UDP ping r

The docs for BPF state that

The reciprocal of Q. Q is conventionally defined as cutoffFreq / bandwidth, meaning rq = (bandwidth / cutoffFreq).

Which is wrong for a band pass filter. cutoffFreq should be replaced with centerFreq, or maybe just freq, as that is the name of the parameter.

This is the help file:
'/Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/BPF.

For classes declared with struct, forward declarations should also use struct. Currently, only struct Message violates this in a few header files (2 or so?).