```
rob@netbook:~$ studio-controls 

Traceback (most recent call last):
  File "/usr/bin/studio-controls", line 1197, in <module>
    us = StudioControls()
  File "/usr/bin/studio-controls", line 321, in __init__
    jack.set_error_function(callback=self.jack_error)
  File "/usr/lib/python3/dist-packages/jack.py", line 2835, in set_error_function
    _set_error_or_info_function(callback, _lib.jack_set_error_function)
  File "/usr/lib/python3/dist-packages/jack.py", line 2874, in _set_error_or_info_function
    def callback_wrapper(msg):
SystemError: ffi_prep_closure(): bad user_data (it seems that the version of the libffi library seen at runtime is different from the 'ffi.h' file seen at compile-time)
rob@netbook:~$ 
```