Optional: JACK info callback.
By default, libsoundio sets this to an empty function in order to
silence stdio messages from JACK. You may override the behavior by
setting this to NULL or providing your own function. This is
registered with JACK regardless of whether ::soundio_connect_backend
succeeds.
Optional: JACK info callback. By default, libsoundio sets this to an empty function in order to silence stdio messages from JACK. You may override the behavior by setting this to NULL or providing your own function. This is registered with JACK regardless of whether ::soundio_connect_backend succeeds.