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Krisp.ai – Mute background noise during your calls

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Re: Krisp.ai – Mute background noise during your calls

#51

Post by rcthompson »

zwarag wrote: post #47
rcthompson wrote: post #44

Is there a way to run an existing audio file through this to clean it up? For example, if I have a video of a presentation with lots of background noise like chairs creaking, people coughing, etc.?

Sure you can. I don't think anybody can stop you doing that. You just need 2 computers. On one you play the clip. On the other you record it. The remove the audio from the video and put the new audio onto it.

Yes, of course I can run my audio file through it by actually playing it and recording the result, but I'm asking if there's a version of this tool that takes an input file and writes to an output file on its own.

Re: Krisp.ai – Mute background noise during your calls

#52

Post by dmos62 »

c2h5oh wrote: post #27
davitb wrote: post #12

Earlier quoted context omitted.

2Hz CEO here (we built Krisp). Windows support will come in Dec. We are working hard on it.

How about a VST plugin? that would give you cross-platform support (Mac/Windows/Linux/iOS) and would allow it to be used as a part of many, many audio processing pipelines - from simple streamers/youtubers all the way to pros

This. A VST plugin would open a lot of opportunities to integrate.

Re: Krisp.ai – Mute background noise during your calls

#53

Post by artavazdsm »

rcthompson wrote: post #44

Is there a way to run an existing audio file through this to clean it up? For example, if I have a video of a presentation with lots of background noise like chairs creaking, people coughing, etc.?

Here is demo link that you can use for that purpose. https://demo.2hz.ai/

We are also building web and iOS apps to cancel the noise in the files.

Re: Krisp.ai – Mute background noise during your calls

#55

Post by colechristensen »

httpsterio wrote: post #49
colechristensen wrote: post #46

Isn't the real solution having two or more microphones and using the multiple signals to locate and isolate the desired sound?

Yes, that's how phone microphones for example work. To remove static background noice would just need to get a silent sample and reverse out the polarity of the static noise from the audio signal. It can be done real-time or in post production. To sum out random background sounds you would need an omnidirectional mic that picks up everything. Then you'd need a close range shotgun type mic from which you subtract all…

What I am thinking of is more is using signal phase differences on spatially separated similar microphones to isolate the desired source and filter the rest. There is probably a name for this I wouldn't remember. You wouldn't need a specific directional mic and could instead build a synthetic virtual microphone with whatever directional properties you wanted (including distance and not just directional selection)

Re: Krisp.ai – Mute background noise during your calls

#56

Post by jamesjyu »

My first internship was at a company that was doing this over a decade ago, but before machine learning had proliferated to adjacent fields. It's easy to separate out stationary signals like ambient noise, which are easily isolated in the frequency domain. But it's a totally different thing to remove something like a baby's cry, shuffling of papers, or other sharp transients. Blindly separating without a large corpus of inputs + machine learning techniques seems impossible.

I remember as intern spending hours in front of spectrograms manually deleting noise so that the researchers could get clean targets. Let me tell you, I started being able to identify a lot of phonemes just by visually examining waveforms.

Eventually, the company did pursue some noise cancellation, but only as one part of their offering. I don't think they ever could get the holy grail of separating non-stationary noise.

Re: Krisp.ai – Mute background noise during your calls

#57

Post by djreynolds »

rcthompson wrote: post #44

Is there a way to run an existing audio file through this to clean it up? For example, if I have a video of a presentation with lots of background noise like chairs creaking, people coughing, etc.?

They have an API: https://2hz.ai/api/index.html

You have to apply for it and it's apparently priced per minute. I applied and I'm waiting for pricing info.

Re: Krisp.ai – Mute background noise during your calls

#58

Post by aviv »

nathannecro wrote: post #36

How do they make money? All audio is processed on device, but is the goal to use the public training/learning to tailor a more robust model which they can sell commercially/integrate into apps/phones/etc?

Getting acquired by Dialpad in 3, 2, 1..

Re: Krisp.ai – Mute background noise during your calls

#60

Post by eli »

stoobs wrote: post #19
davitb wrote: post #14

Earlier quoted context omitted.

Mobile support is harder since Krisp won't be able to register as a virtual mic/speaker on Android or iOS. At least we haven't found any way around it.

double-edged sword - bug Apple enough and you might get support, or bought..

Or cloned
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