What is ROON downloading?

[crieke (Christopher Rieke)]

and it said I had “dirty tracks” which I find amusing even though I have no idea what those are.

Here is some info regarding dirty tracks:

Memory leak? What does 'Dirty' in log files mean?

“dirty” is a technical term, not a problem. A dirty object is one that needs to be re-computed or re-indexed. Just about everything you do in Roon dirties some things and then cleans them again… Outside reference