The municipality of Amsterdam has extended my permit! With special thanks to Mr. A. of the Noord district; after a short chat it took him only a day to honor my request 
which is pretty fast for this kind of requests.
Applying for a license for amplified music is apparently very unusual by Amsterdam standards. It is forbidden to play amplified in Amsterdam, but I have the idea that recently musicians are no longer sent away by the police as quickly as before the lockdown. That’s great, let's keep the streets alive!
