· Some kkbox album is shown up in Roon but cannot be played. Any reason for that. I found those with format labelled with the kkbox trademark followed by "qobuz"
Thank you for the example. This explains the strange behavior you are seeing.
It appears that KKBOX has removed this album from their active library. When a streaming service pulls a title, the object sometimes remains in the Roon database temporarily. In this case, Roon likely attempted to find a metadata match from another available source (Qobuz), which is why you see the mixed branding on a track that is no longer playable via your KKBOX subscription.
Since the album is no longer available in the KKBOX app, it cannot be streamed in Roon.
We’re going to close this thread out, but to summarize what’s happened here for posterity:
Roon relies entirely on streaming service APIs (like the Tidal API, Qobuz API, and the KKBOX API here) to display content. Sometimes, services update their APIs after they make the corresponding update to their native catalog. Content can appear in Roon for a short time because the API hasn’t fully cleared it yet. The metadata is still visible, but the underlying streaming content no longer exists. The “KKBOX” label followed by “Qobuz” in the format usually reflects metadata sources and isn’t related to playback availability, but it’s still a consequence of the KKBOX source suddenly disappearing.
Our team is always working to make this behavior more reliable. In some cases, you can force Roon to refresh your library by going to Settings → Services and syncing each streaming service.