This topic was a great read guys. I have had the same problem which caused a lot of grief. After no help from the dealer and Access I almost sent the TI back as a result, but decided not to in the end. Two reasons:
1) I initially thought it was faulty but further research on the Net revealed other owners with the same problem so, a replacement unit could exhibit exactly the same behavior.
2) I wanted the Virus sound and didn't want a refund, hell what else sounds like the TI?...certainly none of my other synths.
Anyway here's my story with examples:
HTML Code:
http://virusti.com/forum/index.php?act=ST&f=10&t=2800&hl=
I spent a huge number of hours tweaking every parameter in the affected patches. I finally found a way to minimize (not eradicate) the pops.
From Config:
1) Change Input from Analog to S/PDIF
2) Change Clock to 48Khz
3) Sync to Internal
The TI is now quite usable, with only occasional pops on some patches.
Lets hope a new OS will finally fix the problem.
-US