[linux-audio-user] Cutting background noise from a voice recordering? actually

[Kevin Cosgrove]

On 14 January 2006 at 12:08, Reuben Martin <reuben.m at gmail.com> wrote:

> On 1/14/06, Dan Stromberg <strombrg at dcs.nac.uci.edu> wrote:
> > I have a new question though, about cutting background noise from a
> > recording.
[snip]
> > Which brings me back to my current question: What sort of linux software
> > might be good for eliminating the noise from a loud air duct and/or
> > projector fan from a voice recording?

> Gnome-wave-cleaner + an expander.

I concur.  You might also use a gate.  You'll have to play with the 
threshold on the expander & gate to optimize your results.  You could 
do something like this with dedicated hardware during the talk to 
minimize the amount of background noise picked up by the mic and 
coming through the PA.  Hmm, maybe you're recording the talk from 
your vantage point, and the presenter doesn't use a mic?

I'm not sure how much money you want to put into cutting the noise in 
your building.  But, there are sound engineering companies that 
design rooms & buildings to minimize this kind of problem.  They also 
can do some retrofitting.  A friend of mine in Oregon (USA) does this 
for a living.

G'luck....

--
Kevin