“Complete Performance” is data we get from one of our metadata providers. It’s pretty comprehensive, but like any metadata there will be gaps and mistakes.
When Roon matches an album, some performances may include the “complete” flag and only those with the flag will be displayed when the toggle is set.
This can happen when we identify a streaming album or a local album but we only know if the flag is set or not. This means that while the list should only contain complete performances, it’s definitely possible that some complete performances are missing.
Our goal here was to make it easy for people exploring classical music to find full performances, as opposed to accidentally stumbling on excepts or sifting through the list based on duration. If you’re missing performances or finding this data is incomplete or inaccurate, flipping the toggle off should show you the same list as previous versions of Roon.
We have ideas about improving and expanding this data in the future, but since we had a well-populated flag available we wanted to get this into the product as part of the 1.8 release.