Frank,
I just tested this on one of our systems.
-RME Madi set to the lowest buffer size (32) ==>>> no (detectable) latency within the mic path
-RME Madi set to higher buffer size (1024) ==>>> Large latency within the mic path
-Added a videotrack
-Set output of video through Blackmagic card
-Set latency of the Blackmagic card to it’s maximum (1000)
-RME Madi set to the lowest buffer size (32)
==>>> no (detectable) latency within the mic path
So, on my system, the latency dialed into the Blackmagic card has no effect whatsoever and is not in relationship with the latencies of my Soundcard.
There must be something different in our setups.
We are on Win7, so it might have something to do with the OS handling the soundcard differently.
Maybe Oliver of Bodo can clear this up?
Fredo