Can't use Sound library

I'm trying to use the sound library (and I also installed every sound library) but I always get the same error:

A library used by this sketch is not installed properly

A library relies on native code that's not available. Or only works properly when the sketch is run as a 32-bit application.

I tried with Processing 2 & 3, both on Win7 64 bits, tried to move Processing to C:\Processing (as I read in another forum), tried to use Processing examples (File-Examples), and other things and I still can't run it.

Thank you.