Firecat,
As you are in Krakow, have you heard the "Alarm call" at the Cathedral? As I understand it they've been playing regularly since Fifteen Hundred and Frozen to Death (something to do with stopping the Turks). I've never been to Poland myself (more's the pity) so all accounts are hearsay.
Enjoy your trip (And watch out for the "White Spirit"- now THAT I have tried).
Walrus