SPDIF iPurifier and the noises without signal with certain DAC’s could well be an issue but if used in a CD player, then can rule in/out so please try a CD and report it to us via a support ticket.
Past that the most likely explanation is what these systems have in common is:
Example:
“Chrome Cast Audio with TIDAL in Chrome as source.”
As opposed “it happens with Brand X DAC and any source”
We believe that the SPDIF iPurifier merely follows the source (CCA from our example) which in turn receives garbage from the (windows audio) driver and outputs it. It could be that the garbage is created by TIDAL itself, possibly switching sample rates/formats.
The whole chain via Tidal Chrome Plugin, Google Chrome Browser, Windows Audio Driver, Windows Network Driver, Chromecast Audio, SPDIF iPurifier and DAC is very complex and has plenty of areas where the signal can be mucked-up.
Our suggestion is to try different playback software and a playback path.
Note: Our understanding is that some DACs correctly mute the garbage created when connected directly, but not via SPDIF iPurifier, others mute correctly no matter what. Even between the same brand and their different models. But this is best confirmed directly with the DAC manufacturer.
If no luck with the above please open a support ticket.
