Hi @Axel_Lesch,
to get this out of the way first: some weeks ago i already bypassed Sound ID by using a different audio output (pure WASAPI or ASIO). This did not change anything.
With all my observations about the issue that i collected and shared meanwhile i can exclude Sound ID as a component that is causing the trouble. Sound ID is only running on one of the devices i use for listening to music with Roon. The same issue with long delays appears independent of the endpoint that i use. Even if the one computer that is using Sound ID is switch off and i listen via iOS devices of the Mac Mini where Roon is running, im facing the same delay.
As stated many times already i have no issues with audio playback. No dropout, clicks or pops or anhing like this. The playback of a new track does not start before the playback statistics are updated.
BTW: I use Sound ID on the computer that i use for computer based music production. I am very sensitive about latency added to the audio path and i can assure you that Sound ID is adding less than 7 ms. My issue is the range of 15 to 20 seconds. We can continue to discuss Sound ID but i suggest to start a new thread for this, its not related to the issue of this tread.
PS: For me the database (in conjunction with the Roon server application) is still the most likely reason for the issue and i don`t rule it out. Two weeks ago i provide the database export to Roon but i did not hear anything back since then.