“Registration in the Digital Concert Hall is free of charge, and allows you to access numerous interviews, our Education Programme films and a concert recording which lets you try out the Digital Concert Hall without any obligation. A ticket or subscription gives you access to all live broadcasts and videos – as often as you like, on the device of your choice.”
While the Philharmonie is closed, Digital Concert Hall is free and gives open access to all concerts and films.
Source;: Berlin Philharmonic website