:return dict: Min and Max default latency for input and output channels

def latency(self):
        """
        :return dict: Min and Max default latency for input and output channels
        """
        return {
            'input': {
                'min': self.data['defaultLowInputLatency'],
                'max': self.data['defaultHighInputLatency'],
            },
            'output': {
                'min': self.data['defaultLowOutputLatency'],
                'max': self.data['defaultHighOutputLatency'],
            }
        }