I have identified a problem on a separate server. Completely chaotic in time during the broadcast, quiet clicks may appear at first, then they increase in volume and turn into distortions.
The system is assembled by core i7 4 cores,
ESI JULI sound card (FM output) and ALC887 (normal output).
this works via ASIO for All. ASIO buffer is 512, CPU is 4096, output audio buffers are 200 ms.
the version of the Stereo tool is 9.4. What can it be?
Don't use asio4all, you don't need to, especially you say you use 200ms buffer. Use Juli@'s Asio for FM, and use MME or even better KS for Realtek output. Be sure to use Sync, see wich one will do better for you, input or normal output, probably normal, and set it to ON, not auto. Track for few minutes how buffer is adjusting, should be always around center.
Juli@ output will always be good with it's asio, so no worries there.