Since you were upsampling everything I assumed you weren't getting automatic sample rate switching and still needed to make a change in the SSL drivers. I also didn't see you mention that you were using a BNC cable for clocking. Maybe I made too many assumptions.
High Impact AV
- ISF Level II Video Calibrator, THX-HAA Level III Audio Designer/Calibrator
- Colorimetry Research CR-250 Spectroradiometer & CR-100 Colorimeter, Klein K10-A
- Murideo Fresco SIX-G/SIX-A Generator/Analyzer (HDMI 2.x, HDR, UHD)
- ACO Pacific and Earthworks Class 1 microphones