I left them out this time around. The 15 and 25us options were an experiment to use the FM clipper for streaming, and it worked fairly well back then. However, the streaming landscape has changed in the 7 years since BBP was last released; back then high bit rate streams were fairly common, now aacPlus is much more common, and then using any kind of clipper yields terrible results, as anything density created by the clipper will show up as large overshoots on the receive side.
I could explain it ad infinitum, but BreakawayOne had to be easy to use. Thus, FM and Streaming is completely separate in BreakawayOne.
For streaming, use an HD core, which has no pre-emphasis options or clipper at all, instead it uses an advanced look-ahead limiter which sounds much better for streaming.
Best,
///Leif