[LAU] denoising audio files

[david]

On 05/22/2012 12:36 AM, Thomas Vecchione wrote:
> On Tue, May 22, 2012 at 4:36 AM, david <gnome at hawaii.rr.com
> <mailto:gnome at hawaii.rr.com>> wrote:
>
>
>     Audacity has a noise removal feature that lets you select a few
>     seconds of what you consider noise, and identify that to the program
>     as noise. A good spot for me is areas in a recording that are
>     supposed to be silent but generally aren't if you're recording mic
>     input live. Then you select the whole track and run the noise
>     removal on it. Works well enough for me.
>
>
> As I mentioned above, unless they have made sudden huge leaps in quality
> of their noise reduction process it isn't really a good quality tool.  I
> know from conversations with Ricardus some of his uses and they are
> similar to what I have done in the past as well, for example restoring
> old analog recordings, etc.  Where depending on the source material you
> have to have a pretty dang minimal artifact experience(Recordings of
> high dynamic range classical music for example), and also depending on
> the source material the exact needs may change over time, requiring
> automation to use effectively.  Neither of these applied in my
> experience with Audacity's tool.

High dynamic range classical music was exactly what a friend of mine was 
working with. First step was extremely-well-cleaned vinyl. He recorded 
them from a high-end turntable through an Audiophile 2496. Then cleaned 
in gnome wave cleaner. I've heard the digitized versions, and there is 
no noise in them ...

-- 
David
gnome at hawaii.rr.com
authenticity, honesty, community
http://clanjones.org/david/
http://dancing-treefrog.deviantart.com/