Lag starting Each Track - Using Optical Input

[Ziggy]

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?

 

[rubato]

I wouldn't expect WiiM to be able to do very much about gaps in optical or audio input. With wifi or ethernet, the device can pull data ahead of when it's needed, so it can request the next track while the current track is still playing. Can't do that, as far as I know, with SPDIF.

 

[Ziggy]

I assume the WiiM is taking a second to lock on to the signal from the PO100.

I’m going to try to go from a WiiM Mini via Toslink to the WiiM Pro just to add to the troubleshooting info.

It seems like some people are happy with the PO100, so I am guessing there may be a setting somewhere. I tried swapping Toslink cables and it was no help.

 

[Ziggy]

I set it up to go from a WiiM Mini via Toslink to the WiiM Pro. I expected it to not have the 1 second silence but it did.

When I set the mini to have max output of 24/192, there was the silence. When I set the mini to have max output of 16/44.1, there was no 1 second silence.

So it seems to me that either the Mini and the PO100 have the same error, or the WiiM Pro has a problem with the optical input.

(Uptodate firmware on both units, streaming using Tidal connect.)