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Tech: Krisp noise cancelling AI s/w

Mr Red 11 May 20 - 07:21 AM
GUEST,Ray 11 May 20 - 08:42 AM
punkfolkrocker 11 May 20 - 11:44 AM
Nick 11 May 20 - 12:25 PM
punkfolkrocker 11 May 20 - 01:09 PM
punkfolkrocker 11 May 20 - 01:18 PM
Nick 11 May 20 - 01:51 PM
Mr Red 12 May 20 - 02:01 AM
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Subject: Tech: Krisp noise cancelling AI s/w
From: Mr Red
Date: 11 May 20 - 07:21 AM

BBC - Click - Krisp - background noises reduced well.

Demos are wonderful, but this appears to be limited to microphones and: Chrome also with versions that work on apps like Zoom etc.

It looks attractive but is limited to microphones. I was looking for post-processing s/w. I have seen demos on Click of such. One I found on a Mitsubishi website, not for sale - research on improving car voice commands, probably.

Anyone heard of post-processing s/w that can key-in to a speaker's voice and improve the clarity thereof in noisy recordings?

It is out there and maybe not ready for general distribution, but I have a need. One application is a recording having interviewed someone outside and set my Zoom HN2 to shotgun mode and pointed it at myself! Doh!


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: GUEST,Ray
Date: 11 May 20 - 08:42 AM

Saw it on the Beeb but wasn’t really paying attention.

If it’s limited to microphones, there must be a second source somewhere - the built in speaker in the computer? - monitoring the exreaneous noise and enabling it to be eliminated. [I think this is how noise cancelling headphones work - they combine the extraneous noise with the same noise but reversed in phase] If not, there’s no difference from a microphone signal than any other type of signal.

The problem with a single source signal (voice and noise) is that an electrical device has no idea of what you want to eliminate and the only solution will be some complex manual filtering arrangement.


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: punkfolkrocker
Date: 11 May 20 - 11:44 AM

I've recorded click a few days ago for this news item,
but forgot to watch it...

The AV post production industry 'standards' noise reduction software I'm aware of,
standalone software, or VST plugins,
are all too bloody expensive..

I'll try to remember the software names...


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: Nick
Date: 11 May 20 - 12:25 PM

Izotope RX7 Elements I have seen as cheap as $9 and their products are very good.
Personally if I'm recording things I tend to turn the hoover and hairdryer off but each to their own


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: punkfolkrocker
Date: 11 May 20 - 01:09 PM

Nick - I'd be looking to the new generation of software
that extracts human voice from complete music tracks, or heavy background noise..

Not just frequency filtering, phase cancelling, or noise gating..

RX7 is a popular contender,
but I don't know if the Elements version includes the full voice extracting module...???..

I'd hoped to confirm this today,
but my stressed out wife's home working laptop has been to much of a distraction today..

I dread to think how she treats her IT technician at work...!!!
I just handed in my notice...


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: punkfolkrocker
Date: 11 May 20 - 01:18 PM

RX7 Versions compared

Like Nick said, ignore the official retail price..

Izotope is constantly running deals, and even free offers
through sites like "pluginboutique"..

..this is relaxing, taking my mind off my wife's bloody laptop...


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: Nick
Date: 11 May 20 - 01:51 PM

The demo was very impressive though.

I'm in the process of doing some recording and get sent files from a friend which I always remove the background noise of the room that they record in. But it's nothing like what is happening there.

I use Reaper mostly as a DAW and use Reafir to subtract what I don't what and it works well. If you don't know it, you play an example of what you want to remove and it draws a little graph and then removes it throughout the track. But if it starts to be at a frequency level that includes where the vocal or instrument is then it starts to cut from that too. So very impressed with Krisp and the other thing in that it doesn't attack the vocal in the same way. But it's a different thing to what I would ever use as I try to record without having to remove things.

It does remind me. I think there was a pharmaceutical company years ago I delat with who could remove smells rather than mask them. Apparently they did a presentation and were met by reactions of 'that's not possible' only for the guy to say well it is because there is a bucket of dogshit under the table that you haven't yet...


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Subject: RE: Tech: Krisp noise cancelling AI s/w
From: Mr Red
Date: 12 May 20 - 02:01 AM

I have seen a review that claimed Audacity was the best free one out there, but that is mostly bandpass from use of older versions. A lot of similar programs use the same wheeze.

I did see reviews of Krisp where people were criticising it because it re-formed websites. My plan is first to try with Chrome and look at a track on a simple webpage and inspect the HTML/JavaScript that results. And see if it does anything for the track.

From what is said it is clearly cloud computing, hence the need to alter the HTML IMO. And to execute such a task would need intensive processing. The BBC demo compared Krisp with an NVidia system that used the graphics processor of a gaming laptop and was equally good, though not commercially available.


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