I experience a very disturbing issue with Cubase 6 together with 2 rme Multiface II interfaces (using 2 HSDPe interface cards).
If everything works fine, the system would start up, Cubase starts our default project, and the external latency meter shows a 5.4 ms roundtrip latency, this is at 64 samples buffer size.
But since a few months, after startup the system exhibits a random huge latency value, in the rage of 300 to 800 ms or so. Sometimes, if I open the rme settings dialog and switch between buffer sizes, the system comes back to 5.4ms latency. Often it takes many attempts of switching back and forth until the system settles at the normal latency. Sometimes, however, it does not help at all. Restarting the system anew sometimes helps, other times not.
This is a live performance setup and this bug is very disturbing for our work. Often I sit there, the artists wait and the system lets me down…
We use 2 independent PCs here with comparable setup and both systems exhibit the same symptoms. Both PCs (Dell Precision workstations) run Windows 7 64 bit with 2 rme HSDPe cards attached to 2 Multiface II. One of the PCs runs Cubase 6.5.3, the other 6.5.1. The Cubase ASIO performance meter runs around 50% on both systems, but the systoms also show up with test projects using barely any ASIO performance.
We did set up our Cubase projects anew from scratch, this did not help. We deinstalled all rme drivers, switched cards around in the slots - no difference.
We have been messing around with this issue since a long time and invested lots of energy in finding a solution. Basically we need systems which start and run stable each time we start them up…
Any help appreciated.