Lag starting Each Track - Using Optical Input

[Snash22]

I have my WiiM Pro being fed through its Optical Input*. I have the Optical Output set to fixed resolution 24/96.

For each track, there is a millisecond or first note delay. This happens on every track.

I don’t get this delay using Tidal Connect nor AirPlay.

* The long story is that I am streaming Lossless H-Res Apple Music through an old iPhone using the CCK, That goes to USBC to Optical converter (SMSL PO100 2024) into the WiiM Pro.

Any ideas on this? Is it expected through the Wiim’s optical input?

 

[Burnside]

Have you any other means of testing the optical input? Might there not be latency involved in the conversion chain?