Hi Coeno

The G08 can be set to output 44k instead of 88k if you set it up (from the front panel) as Type 3. It may still do all of it's internal processing at high speed and simply down sample again at the output, but it does at least give you an option to try both ways with the 568.

Since your other slices work with the 568 over optical, is the a possibility of the optical lead from the G08 being fractured, or ill fitting? Surprising for it not to be working if you can see it illuminated at the Toslink output.