grab raw data from microphone and send it to the output

Ivan Riabtsov ivriabtsov at
Sun Feb 7 10:51:50 EST 2021

well, I have a portable microphone and the main source of noise a TV,
which is a few meters behind my back, if i put a microphone (for
example) in the middle, between a laptop and a TV, it may be possible
to compensate for the delay, I repeat, this is all solely for the sake
of experiment.

вс, 7 февр. 2021 г. в 16:45, Greg KH <greg at>:
> On Sun, Feb 07, 2021 at 04:38:08PM +0300, Ivan Riabtsov wrote:
> > I want to experiment with active noise cancellation, i want to receive
> > a wave from an input device (microphone), invert the wave and send it
> > to the output device (headphone or speaker). Therefore, I need a
> > minimum delay.
> Then I strongly suggest you look into a much smaller kernel, on a
> dedicated tiny microcontroller, as that's what systems that do this
> today use.
> But if you just want to try it with your laptop, good luck, latencies in
> your hardware itself are probably going to prevent this from being
> possible.
> greg k-h

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