I can’t comment on the Pavane but I feed my Onyx from the baby Ambre via spdif and it sounds better than when I had the USB connection from SoTM sms-200 (which was itself improved when I went through a schiit eitr to convert to spdif prior to getting the baby Ambre!) simpler is better, hence replacing both SoTM and eitr with baby Ambre. I still plan to go i2s from regular Ambre at some point in the future.