I run p3d 3.4 on a system with multiple sound outputs - Normally onboard Realtek speaker outputs or a LX3000 MS USB headset. Normal usage is all outputs are routed to the USB Headset. If I switch to speakers all sounds emanate apart from the ATC dialogue which stays resolutely on the Headset!? Now there appears to be no way to get this to switch away in the software, is there a configuration file somewhere? Also I notice that on some aircraft incorrect sound setup can cause the dreaded stutters and it begs the question that the whole issue of 'log jams' in the sound chain could be an issue - there seems to be no use of ASIO drivers such as ASIO4All to alleviate any 'slowdowns from the sound sub system - this being particularly important in hi-fidelity multi-sound systems in modern sim software.