Chris,
In at least on post you had mentioned something was not a minimum phase system, perhaps in room echos.
Could you expand on what is or is not a minimum phase system and what means to us.
BTW in an early publication PWK was talking about using amplitude to determine phase (hazy on this) and it might have been that a Hilbert transform did this. Maybe only with minimum phase systems? Very hazy.
Thanks,
WMcD