'Increase the resolution of a DrumTrack.
Increases the resolution of a DrumTrack object by a factor of `k`. This uses
empty events to extend each event in the drum track to be `k` steps long.
Args:
k: An integer, the factor by which to increase the resolution of the
drum track.'

def increase_resolution(self, k):

    super(DrumTrack, self).increase_resolution(k, fill_event=frozenset())
