Apple Logic Pro /LogicExpress Discussion

Logic has a Denoiser under "Specialized" menu, but I haven't had  
great results with it.  I use Wave Arts' Master Restoration (MR)  
Suite for my speech research stuff and have had great results with  
it.  I don't know the mechanism used by Logic's built-in denoiser,  
but MR Noise functions kind of like a multiband compressor/gate with  
a learn function so it knows what frequency bands to gate/attenuate  
at what thresholds.  I'm pretty sure both are very different from  
what your engineer friend does.

The built-in Match EQ has a learn function, so you could use that to  
create a frequency response curve that negates the spectrum of the  
noise.  I've never used it for that purpose, but have used it to try  
to emulate the spectrum of a voice or a mix, and have never come up  
with anything usable.

I am not the most informed on this topic, but I don't know of any  
noise reduction plugins that use a phase inversion technique like you  
mention, but if you just want to repair noisy recordings, I would  
recommend something like Master Restoration, regardless of the method  
used.

Good luck,

Gregory

On Aug 11, 2008, at 4:56 PM, Tim McLane wrote:

> I have a friend who is an audio engineer who explained to me a showed
> me that to clean up some recordings, he samples the noise at the
> beginning of the track or sample ---usually AC noise---and then uses
> some kind of phase reversal to cancel that noise out. In other words,
> after this procedure, the noise is gone and the track is much
> cleaner. It is even used on old 78 or 33 1/3rd LPs when transferring
> them to CD. I do a lot of transfers from cassette to CD and they are
> so dirty, it's horrible.
>
> Do we have or can we use anything like that in any one of Logic's
> samplers or plug-ins?
>
> Tim McLane
> timmclane@...
>
> [Non-text portions of this message have been removed]
>
>
> 



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