Timings for Pioneer IR

I'm actually using a Xantech 794 interface and SR cabling but I assume any timings that work well for emitters should work well for this too. The commands work but for example skipping quickly between tracks is unpredictable and does not work anywhere near as well as using the remote. I've tried a few different timings but no improvement yet.

Does anyone have any suggestions? (CTON, CTOF etc?)