def __init__(self, track, comp_location, duration, 
                in_volume, out_volume, fade_type="linear"):        
        Dynamic.__init__(self, track, comp_location, duration)
        self.in_volume = in_volume
        self.out_volume = out_volume
        self.fade_type = fade_type
A fade is a :py:class:`radiotool.composer.Dynamic` that
dataset/ETHPy150Open ucbvislab/radiotool/radiotool/composer/fade.py/Fade.__init__