This will set the actual-latency-time and actual-buffer-time of the sink and source. We completely ignore the latency-time/buffer-time values set on the element because WASAPI is happiest when it is reading/writing at the default period. Improving this will likely require the use of the IAudioClient3 interfaces which are not available in MinGW yet. https://bugzilla.gnome.org/show_bug.cgi?id=792897