I found something interesting with my new VR machine I built and a tracking issue.
Specs: i7-4790K @ 4.4Ghz, 16GB HyperX, MSI 1070 Gaming X 8GB, 256GB SSD (OS) 1x 1TB SSD (Games) 1x 1TB HDD (For extra space and media).
I was losing tracking in Audiosurf sometimes. Not at the same points. Tried reinstalling all software & drivers, disabling camera, USB2 rather than USB3, re-mounted the lighthouses, turned off all room fans keeping me cool, covered reflections in the room.....nothing seemed to work. Was a fresh OS install so not the OS.
After thinking of possibly doing a dreaded RMA, I had an epiphany. I wondered if the mechanical drive's spinning up and down due to access/power saving was causing some kind of OS IO interrupt which effected the entire system, so I disconnected it.
Worked.
So now my VR machine is entirely on SSDs, with perfect tracking. Just a thought to others who might be having a similar issue.