When running the collection scanner, at the moment it runs itself, collects some errors and shows them to the user (in reality it shows quite a bit more errors on CLI too, though).

Sometimes the errors are interesting, that is, wrong metatags, unrecognized audio formats, duplicates and so on. The tool should be able to categorize the errors in some kind of way, like for example to show ID3 tag errors, or show duplicates, or show missing support for an audio format.

For audio format supports, there could be kind of whitelist/blacklist (maybe configurable by user?) to allow filtering certain types of files out from the error list.