Removing Background Noise

[bolla]

Easy way to remove some extraneous noise from home recordings. Hard drives etc

1. Record a part.
2. Don't move a thing.
3. Record the noise.
4. Flip the phase of the noise or the original
5. Combine and Bounce to disc

So easy to do now. Used to be a pain with tape. Much nashing of teeth about a generation loss.

Used to do this with singers who could sing well with monitors but not with cans. (1 speaker for foldback fired at the null point of a figure 8 mic)

Thought it might be useful or bleedin obvious......

Cheers, Bolla

[monkey man]

Thank you Adrian.
Handy reminder, that.

Even nicer would be an included plug-in.
Logic has one, apparently.

[kassonica]

Nicky the word logic seems to be creeping into your posts a lot lately and I'm getting worried your becoming, illogical

My wife has logic 8 and I've had to use it on occasion (not for my own projects though) and after DP (and outside the fact that L8 is an improvement and has some nice plugs etc) IT IS A TOTAL PITS.

Wait dear monkey all will be revealed soon and you will look back on these dark 'illogical' days and wonder why you ever had such dark thoughts.

[monkey man]

I sure hope you're right, Mark.
Funny this, as it's usually I who assumes the role you're playing here.
It's a conspiracy of illness, lack of energy, confusion, frustration and... I almost said impatience, but I'm not broken yet (limbs hangin' on by threads, methinks, but not quite broken ), that has seen me morph into a bit of a mess.
No matter. Like a smell that just won't go away, I'm still here.

It's simple, I want what Logic has, but I want it in DP, and I want it now. Me, me, and more me, methinks.
The Monkeycentric theory is alive, and I need an all-in-one DP at the centre of my Universe.

Thanks for the soothing words of encouragement, Mark.
All appendages crossed...

[bolla]

Even nicer would be an included plug-in

Why use a plugin when there's a harder way?
Back to first principles I say

Keep reaching for that 3 on the keypad MM.
Cheers AB

[monkey man]

LOL! Thanks Adrian.

[Dwetmaster]

I've never thought of that. That a cool trick. I'll certainly use it...

[stephentayler]

BTW it helps if you don't use any compression or limiting on the signal whilst recording as it will change the relationship of the out-of -phase noise. It can always be done after the bounce.

kind regards

Stephen

[kassonica]

I sure hope you're right, Mark.
Funny this, as it's usually I who assumes the role you're playing here.
It's a conspiracy of illness, lack of energy, confusion, frustration and... I almost said impatience, but I'm not broken yet (limbs hangin' on by threads, methinks, but not quite broken ), that has seen me morph into a bit of a mess.
No matter. Like a smell that just won't go away, I'm still here.

It's simple, I want what Logic has, but I want it in DP, and I want it now. Me, me, and more me, methinks.
The Monkeycentric theory is alive, and I need an all-in-one DP at the centre of my Universe.

Thanks for the soothing words of encouragement, Mark.
All appendages crossed...

What in ilogic do you think you need, Nicky?

L8 doesn't seem any more efficient than DP at least with audio and on a G4.

In some ways less so.

Hang in fellow Melbournion the longer DP6 takes to come out, the better it will be.

I've just got such a strong feeling on this because they have listened to us implementing a lot of our suggestions that I feel it's not going to be released until it is as bug free and optimized as possible.

It just makes sense.

Darkest part of the night is right before the dawn.

[monkey man]

What in ilogic do you think you need, Nicky?

Well, this thread prompts the question: Where's our denoiser?
iLogic has one.
Match EQ? I'd also love a decent enough suite of VIs that iLogicEnvy's banished for good.
Cut-down versions of all MOTU's stand-alone instruments would be a start.
Guitar and amp sims wouldn't do any harm either.

I've seen the future, and it has one redeeming feature: a rip-roarer of a DP for us all, an all-in-one powerhouse, a one-stop shop, a self-contained audio creation suite, the DAW to rule them all, an all-you'll-ever-need-for-most-any-project DP, an all-I'll-ever-want version of DP... an... you get the idea.

Hang in fellow Melbournion the longer DP6 takes to come out, the better it will be.

Agreed; I've always had this attitude towards MOTU.
One must trust that they're capable of getting it right.

I've just got such a strong feeling on this because they have listened to us implementing a lot of our suggestions that I feel it's not going to be released until it is as bug free and optimized as possible.

Agreed.

It just makes sense.

Agreed.

Darkest part of the night is right before the dawn.

I can't remember who said it, but someone said, "It's darkest before it's completely black."

[kassonica]

Now Nicky have you used the denoiser?

I have briefly and all I can say is it was very amatuer and not very useful.

Match EQ I havn't used but have heard good things.

You have me on the guitar sims though Logics is useful and I had to use it on an EP recently BUT it does not replace my fender or marshall.

And I have to admit the cut down versions of DP VI range included in DP would be AWESOME it's a great idea from the man who says he is a monkey.

and as for,

I can't remember who said it, but someone said, "It's darkest before it's completely black.

THAT MADE MY DAY

[monkey man]

Aah... but there's a work in your spanner, Mark:

Whilst I've never used iLogic (Yes! Yes! Yes!), I'd not expect the guitar plugs to be, say, Line6, Guitar Rig or real-amp quality, nor would I expect the denoiser to equal a Cedar unit.
Heck, I'd even not expect SpaceDesigner to equal Altiverb, and I'd be right I'm sure.

The point is simply that they're there to use in a pinch or in a limited-budget situation (such as mine), and that makes sense to me, especially for tasks one might normally do without because of the prohibitive price of 3rd party offerings, or indeed get ripped off for when one only needs the plug once in a blue moon.
Further, I'd expect MOTU's guitar amp & cab, match EQ, reverb and compression offerings to trounce iLogic's anyway.
If MOTU's VIs happen to pip 'em too, I'll be in MOTUVARNA!

Thank you for your intellectual services, fellow Melbournian.

[ajdelange]

1. Record a part.
2. Don't move a thing.
3. Record the noise.
4. Flip the phase of the noise or the original
5. Combine and Bounce to disc

This is unlikely to work. If the noise is broadband (hiss of an airconditioner, rush of a computer fan, street noise etc.) it will acutally add to a previously recorded sample of it in the power sense (because the two copies are not coherent) and the noise level will go up 3 dB relative to the signal. If the "noise" is narrowband (like 60 Hz, or in the land of Oz, 50 Hz) hum then addition or subtraction will occur according as to how the phases on the original and noise recordings are aligned. Simply flipping the phase 180 is unlikely to result in cancellation but if you low pass filter so you can see the hum waveforms, align properly (180 apart) and then remove the low pass filters it is possible to get appreciable nulling (20 dB or more). OTHOH if the alignment puts the two hum waveforms in phase their amplitude will increase by 6 dB relative to the signal.

[Dwetmaster]

I've seen the future, and it has one redeeming feature: a rip-roarer of a DP for us all, an all-in-one powerhouse, a one-stop shop, a self-contained audio creation suite, the DAW to rule them all, an all-you'll-ever-need-for-most-any-project DP, an all-I'll-ever-want version of DP... an... you get the idea.

and then you see it...



900$.......




FOR AN UPGRADE!!!

[Phil O]

1. Record a part.
2. Don't move a thing.
3. Record the noise.
4. Flip the phase of the noise or the original
5. Combine and Bounce to disc

This is unlikely to work. If the noise is broadband (hiss of an airconditioner, rush of a computer fan, street noise etc.) it will acutally add to a previously recorded sample of it in the power sense (because the two copies are not coherent) and the noise level will go up 3 dB relative to the signal. If the "noise" is narrowband (like 60 Hz, or in the land of Oz, 50 Hz) hum then addition or subtraction will occur according as to how the phases on the original and noise recordings are aligned. Simply flipping the phase 180 is unlikely to result in cancellation but if you low pass filter so you can see the hum waveforms, align properly (180 apart) and then remove the low pass filters it is possible to get appreciable nulling (20 dB or more). OTHOH if the alignment puts the two hum waveforms in phase their amplitude will increase by 6 dB relative to the signal.

Hmmm. You beat me to it. I've used this trick for 60 Hz (and 120 Hz) noise before, especially from guitar amps. It's not possible with tape (tape speed is too inconsistent over long periods), but works well with digital recording. I can't imagine other non-periodic noise sources being reduced using this technique.

Phil