As for transients - here's the problem: it hasn't even been defined what a transient is
. It's problematic, because every definition ends up in some extreme case for which it doesn't work. With all the variety of sounds one could want... So in most cases the transient detectors are searching for abrupt changes in level. But the quicker they find one, the quicker the transient is considered "stopped" as well... So anyway, there will always be a signal that would be able to fool a transient detector imho. I think in many cases even 2 people could disagree if/how much something is a transient.