[LAU] denoising audio files

Folderol folderol at ukfsn.org
Tue May 22 19:53:43 UTC 2012

On Tue, 22 May 2012 09:43:35 -1000
david <gnome at hawaii.rr.com> wrote:

> 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 ...

Horses for courses...
I find Audacity works perfectly well for noise reduction on vocal or
non-distorted guitar tracks. Anything with a lot of treble content seems
to develop a background 'mush' underneath the audio, but not there in the

Will J Godfrey
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.

More information about the Linux-audio-user mailing list