@classmethod
def piano(cls):
    """Piano Equalizer.

        Suitable for Piano tracks, or tacks with an emphasis on Female Vocals.
        Could also be used as a Bass Cutoff.
        """
    return cls([(0, -0.25), (1, -0.25), (2, -0.125), (3, 0.0), (4, 0.25), (
        5, 0.25), (6, 0.0), (7, -0.25), (8, -0.25), (9, 0.0), (10, 0.0), (
        11, 0.5), (12, 0.25), (13, -0.025)])
