remove coughs

[kozikowski]

Can you post the cough and one or two minutes on both sides of it? As high a quality as you can. Don't bother sending MP3.

You can try one of the many free posting services or ZIP the WAV file and post that here.

Koz

[steve]

Finding and fitting a replacement of required pitch,dynamics and duration is a non trivial exercise, especially in some music (eg mixed piano & singing)

But many times it CAN be done, both effectively and relatively easily, without the need for advanced degrees in acoustics, mathematics and computer programming.

There has been a lot of work done by a lot of very clever people over the past few years in developing noise separation. For the film, music and television companies, a good solution to the problem would be worth $ millions. Although there has been a lot of progress made, and some very impressive "samples" demonstrated, there is still a very long way to go.

The mathematics alone are extremely complicated - here's a "simple" example of the kind of thing involved:


It's certainly light years beyond my Nyquist programming skills, but I can do a pretty good edit with Audacity.

[kozikowski]

The range of positive to negative infinity is a long way.

Koz

[robin48gx]

I understand the maths above. I use Z transforms and the like at work for
control engineering and DSP for detecting flames and the like.

In 1988 my college project was DSP based 68000 / C stuff, s plane to tustins of filters
(s _> Z) and FIRs and FFTs etc, so been doing this kind of thing for a while
Would like to know more about have to develop plugins.

Would like to develop an anti cough/unexpected noise filter.

Really need a bit of API knowledge fast track tips etc.

[steve]

Probably the easiest type of effects to develop are "Nyquist plug-ins".
"Nyquist" is a programming language based on XLisp (a dialect of Lisp). Nyquist scripts are written in plain text and do not require compiling.

Some useful links for Nyquist programming:
http://audacityteam.org/help/nyquist
http://www.audacity-forum.de/download/e ... ist-en.htm
http://www.audacity-forum.de/download/e ... /home.html
http://www.audacity-forum.de/download/e ... -index.htm
http://forum.audacityteam.org/viewforum.php?f=39