* Sometimes (?) SoundEffect buffer reports -1 ChannelsPerFrame, and treats it as stereo even being a mono sound. This results in a sound played at twice the speed, very high pitched.
Since on XNA all sounds had to be Mono, treating this case as Mono fixes the issue
* MonoGame on MAC throws a notimplementedexception on IPv4Mask, so we return null on Mac Implementation. Had to add a MONOMAC define to the project.