I switched to the asio multimedia driver for the internal soundcard and recorded the 49 tracks of audio without a problem. Asio performance is at around 2%. Its not the SSD or the second HDD. Benchmarks are all ok. I wonder if its an issue with the audinate driver. I can see my CPU load increase on the first core with every channel I patch from one of the RIOs to the DVS. With all 49 channels patched I have a constant cpu load of approx 35%. Are there any debug tools to see what happens within the system at the moment the recording stops?