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    What maximum signal frequency are you interested...

    What maximum signal frequency are you interested in? A simple passive filter might be enough depending on where the signal
    goes (for instance human hearing acts as a low pass filter!).
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    Yes, that's expected. The Audio library handles...

    Yes, that's expected. The Audio library handles signals at 44100 samples/second (23Ás). You
    need a reconstruction filter (aka anti-aliasing filter) on the output of the DAC with a cutoff...
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