def note_to_f(note: int, tuning: int=440) -> float: 
    """Convert a MIDI note to frequency.

    Args:
       note: A MIDI note
       tuning: The tuning as defined by the frequency for A4.
    
    Returns:
        The frequency in Hertz of the note.
    """
    return (2**((note-69)/12)) * tuning