portaudio_backend(void):
        stream(NULL), blocksize_(0)
    {
        int err = Pa_Initialize();
        report_error(err, true);


        list_devices();

#ifdef PA_HAVE_JACK
        PaJack_SetClientName("SuperNova");
#endif
    }
PaError PA_AudioIO_JACK::setJackClientName(const char *programName){
    return PaJack_SetClientName(programName);
}