Ok well I did the upgrade to 1.5 for BOTH of my Octa-Captures since you can't just do one of them as I found out. So far it seems to be working fine although it did not make my latency numbers go down at all. I suspect this is a consequence of using 2 Octa-Captures strapped together to expand to 16 total ports.
As far as getting noise I noticed that if I enabled the VS Expand checkbox it made everything sound awful. If you read the documentation it says that it only reports on the status of the link between the two units. Well....it sure does more than that cause if I run without that checked it works fine but not if it is checked.
Here is the detailed way I did my install. If you did it differently maybe things screw up. I was paranoid.
I first uninstalled the Octa-Capture drivers and unplugged all my USB devices except for my mouse per instructions.
I then put the first Octa-Capture into software update mode by holding down the button combination and then putting the power on. When it said to connect the USB cable I did so and the device came up as a disk on my computer.
I copied the software onto the virtual Octa-Capture disk drive per instructions and waited till it was done then disconnected the USB cable. When it said it was done and ready for reboot I power cycled it. It came up on V1.5.
I repeated the above for my second Octa-Capture which is slaved to the first one. Also no problems.
I disconnected the USB cables again and installed the V1.5 windows drivers. When it told me to I plugged my Octa-Capture in to the USB port and it said the drivers were successfully installed.
I had to reboot a couple of times but then Sonar X1c saw all 16 of my ports per usual. I played without any issues then decided to see what would happen if I popped the sample buffer size down to 96 samples at 96Khz. Bad idea cause I got dropouts. I was running Geist, Stylus RMX, Kontakt, Nexus 2, and Z3Ta 2 on my project at the time. I had a lot of stuff going on so it really did not shock me that this was a bad idea. When I put my buffers back up to 192 everything worked fine.
So....at least I did not have to jump off a roof. I wonder how low my latency could go if I did not have two Octa-Captures strung together?
Ken