I'm not quite sure if any one of us knows what the others are discussing exactly. I certainly don't anyway. Is this still related to testing individual frequency pulses to form a map of ringing per frequency?
I'm not doubting that one gets problems cutting off a wave with one's window. Though I still don't (even after reading that article) see where the abrupt start or stop to a physical sine waves comes from if not from trying to represent it as individual samples? (Not that it matters, since we're treating our measurements digitally anyway.)