[PlanetCCRMA] Re: Hiss, Noise reduction etc

Alejandro Fernandez a.fernandez@bristol.ac.uk
Fri Oct 17 02:28:02 2003


Thanks for your reply!

I got the most recent GWC version from sourceforge, and ran .configure:

checking for sf_open in -lsndfile... no
configure: error:

 Libsndfile 1.0.0 or greater not found, find it at:
OR perhaps you have installed it and libsndfile.so.1's
path is not in /etc/ld.so.conf ("man ldconfig" for help)?
[root@acer gwc-0.19-10]# locate libsndfile.so.1

I think ld.so.conf doesn't need usr/lib in it... It should search there
by default, shouldn't it?

There's also an rpm: 

[root@ale gwc-0.19-10]# rpm -Uvh /home/ale/.Trash/gwc-0.17-78.i586.rpm
warning: /home/ale/.Trash/gwc-0.17-78.i586.rpm: V3 DSA signature: NOKEY,
key ID 9c800aca
error: Failed dependencies:
        libdfftw.so.2 is needed by gwc-0.17-78
        libdrfftw.so.2 is needed by gwc-0.17-78
[root@ale gwc-0.19-10]# locate fftw.so

Looks like it's suffering from extremely-old-rpm-itis...

On the other hand, I've been using sweep, but I can't get any ladspa
plugin to actually compress - mostly because I don't understand the
parameters, or the basics of sound waves or compressing the bits I want
out of them. Do you think you could walk me through a typical use of it
to eliminate background noise that was audible on it's own somewhere in
the track? (Unless gwc is somehow runnable!)



On Thu, 2003-10-16 at 15:38, Andrew Burgess wrote:
> >Most of what I'd like to do with audio software for linux is in the area
> >of taking out background noise, hisses, humms, hiccups and sneezes.
> I work on the same thing.
> >Can
> >anyone recommend a tool in the planet ccrma list (no medical
> >prescriptions please!) and possibly a tutorial on the web, or a small
> >example? So far I've found denoi and gwc(Gnome wav cleaner) but I can't
> >get them to work on my redhat 9.1 computer.
> Sweep is more stable the gwc.
> Gwc works for me on rh9 + ccrma. How does it fail for you?
> It has bug related to cutting out sections that aren't exactly at the front of
> the end of a sample. I mean to take a look at it. I like gwc because it loads
> files twice as fast as sweep (I imagine it mmaps them because it saves files
> with only end truncation instantly) and my files are 1/2GB...
> I think you might be working manually for hiccups and sneezes unless they
> are always louder than the desired content. If so you could make some
> samples available and I'll try to automate something to attenuate them.
> There are a ton of LADSPA plugins thet I haven't wrapped my head around
> yet, including at least 3 compressors.
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