RAT on the SGI generates more noise than on other platforms, and the silence suppression doesn seem to work. Why?
There is considerable crosstalk between the analog microphone and headset interfaces when operating in full duplex mode on some SGI hardware (i.e. Indy’s). This breaks the silence suppression algorithm, although we really ought to be able to build a more robust algorithm. SGI are aware of the problem, but it is unlikely to be fixed on existing hardware (the O2 machines do not have this problem).
