"I am sure such moderate compression on FM is euphonic in that it
raises
the level of the decay of notes and the level of ambience, leading to
a greater impression of presence.. "

But for the reverberation decay (if that's what you refer to) to be
affected by the compression that would mean the compression was acting
with a timescale similar the reverberation time of the hall - typically
a few seconds. Surely the compression has a timescale of many tens of
seconds does it not?

Robert




--