We made some tests to get a more clear picture, and in
fact we got
rather confused instead. I will just give you the results, without
Windows->Options->Sync->Align captured material with [ Capture Time ]
Recording from soft-synths or other sample-synced sources requires a
different post-capture alignment policy than aligning to external
audio. I don't understand why we don't use JACK port latency info to
correct this, but jesse and i thrashed this out and for some reason we
decided that the user had to make the decision.
I'll comment on the rest once I hear what you get when you make this
change.
--p