Checks the expanded parameters for invalidating conditions

        :param samplerate: generation samplerate (Hz), passed on to component verification
        :type samplerate: int
        :returns: str -- error message, if any, 0 otherwise

def verifyExpanded(self, samplerate):
        """Checks the expanded parameters for invalidating conditions

        :param samplerate: generation samplerate (Hz), passed on to component verification
        :type samplerate: int
        :returns: str -- error message, if any, 0 otherwise"""
        results = self.expandFunction(self.verifyComponents, args=(samplerate,))
        msg = [x for x in results if x]
        if len(msg) > 0:
            return msg[0]
        else:
            return 0