How to use the ledfx.effects.smooth function in LedFx

def melbank(self):
        """Returns the raw melbank curve"""

        if self.volume() > self._config['min_volume']:
            # Compute the filterbank from the frequency information
            raw_filter_banks = self.filterbank(self.frequency_domain())
            raw_filter_banks = raw_filter_banks ** 2.0

            self.mel_gain.update(np.max(smooth(raw_filter_banks, sigma=1.0)))
            filter_banks = raw_filter_banks / self.mel_gain.value
            filter_banks = self.mel_smoothing.update(filter_banks)
        else:
            raw_filter_banks = np.zeros(self._config['samples'])
            filter_banks = raw_filter_banks

        if self._ledfx.dev_enabled():
            self._ledfx.events.fire_event(GraphUpdateEvent(
                'raw', raw_filter_banks, np.array(self.melbank_frequencies)))
            self._ledfx.events.fire_event(GraphUpdateEvent(
                'melbank', filter_banks, np.array(self.melbank_frequencies)))
        return filter_banks