leave in a comment about how to offset the audio time in case your sound card is lying we didn't eventually need this because we found a good-sounding card that could report offset correctly. But if you're stuck with a card that reports offset incorrectly, you can play with this offset for a partial workaround. note that song intros will probably still be corrupted (but you could workaround that by prepending some silence)

# Abstract UI widgets

class UI(Something):
    pass

class Scale(UI):
    def __init__(self, start, stop, res=0.001):
        pass

""" unfinished
class Button(UI):
    def __init__(self, etc)
"""