[BUNDLES\]SPECTRAL_CLEAN MULTI Ns1 [Ns2 ...] Clean a (spectrally) smoothed version of the data cube, then start from this result to continue Cleaning with the original spectral resolution. To be implemented: the method can be generalized to more than 1 smoothing scale, by performing the smoothing in descending order (Ns1 > Ns2 > ... > 1). This may allow to catch signals that have widely different widths.