Huh, TIL that recordings that were released before 1963 are in the Public Domain in Germany!
But the music itself is still under copyright if the composer has not been dead for at least 70 years... so many recordings of the giants of classical music are completely free, but the giants of jazz still hold on to their copyrights...
Wonder what that means for using the original recordings, though...
cc0.oer-musik.de/Musik <- Bunch of digitized public domain recordings!
(At least in Germany 😆 )