convolution

raphaelpoli · Post by **raphaelpoli** » Mon May 05, 2014 2:52 pm

Hello.
I've been using audacity a few times now. And I am aware there are a lot of things to add before this, but one very interresting function that I would love to be able to use is convolution. It is a function that allows to extract a tone from for example a short sample, and to blend it with a longer sound such as generated noise, in order to obtain a long sound with that precise tone.
hope you can guess how to do this!
yours,
Raphael

Post by **kozikowski** » Mon May 05, 2014 7:15 pm

Most people want a convolver to suppress room echoes. It's the only tool that has any positive effect at all.
Koz

Post by **steve** » Mon May 05, 2014 7:25 pm

See these links:
http://www.cs.cmu.edu/~rbd/doc/nyquist/ ... l#index414
http://manual.audacityteam.org/o/man/ny ... rompt.html
http://wiki.audacityteam.org/wiki/Nyqui ... _Reference

Robert J. H. · Post by **Robert J. H.** » Mon May 05, 2014 9:14 pm

A simple example (for the Nyquist Prompt):

Code: Select all

(setf i-r (abs-env (mult (noise) (pwe 0 1e-20 0.3 0.01 0.4 0.1 0.4))))
(convolve s i-r )

The impulse response is 0.4 s long, that's fairly long already.

Post by **Gale Andrews** » Thu Jun 26, 2014 7:02 pm

I counted the vote and moved the topic here.

Gale

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