Can anyone find a way to intercept (and change) the audio in OS X before it reaches the speakers? I understand that I can build a driver and change the sound settings for output there, but what I would like to do is use the existing audio output and control the stream before it reaches the selected device, without the trick of redirecting the driver. I would also like to invert and connect the microphone stream before it gets to the rest of the pipeline.
Is it possible?
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