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lucianodato / noise-repellent

Lv2 suite of plugins for broadband noise reduction
GNU Lesser General Public License v3.0
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Sidechain input for noise source? #52

Closed unfa closed 6 years ago

unfa commented 6 years ago

Would it be possible to introduce a secondary sidechain input for noise print capture?

Possible use cases are:

Using two microphones in a noisy environment to capture a signal (voice) + noise on one mic, and just the background noise on the other mic and use the information to get a clean signal (with no background noise).

I know modern smartphones do just that for improved call sound quality with a secondary microphone.

The problem is - simple mixing with polarity flip won't work, because of phase, EQ and delay differences.

However - is a secondary input could be used as live noise source for spectral analysis and noise removal - I suspect the effects could be very good.

lucianodato commented 6 years ago

That is called active noise cancellation. This algorithm is not that unfortunately. Capturing the noise profile and reducing it are two separate process that cannot run at the same time.