Hey guys i'm working on a sampler that uses a simple equation system to determine parameters of reverb, volume and pitch filtering. The goal is to emulate 'depth' using the idea that if a sound's source moves away from our ears, we will perceive it as quieter and more diffused, with its high-pitch content less present. Motivated by this, I started to read about the biquad ugen, but i haven't figured out how to deal with its coefficients so I can make something interesting out of it. My question is, how can i make a high cut filter that gradually reduces the high-pitched content of the sound signal's spectrum, based on an input of 0-100? (0 = no filtering, 100 = no high-pitch content) thanks!
Hi I did something a bit similar recently. My approach was to simply to apply a decreasing exponential function on an input value to control the gain of a sample and simulate distance. Math.exp(-param * coef) will give you 1 for param=0, and progressively decrease at a speed controled by coef. Based on this, I guess all you have to do is to find the proper coefficients to transform your decreasing parameter into a decreasing frequency for your filter. by the way, if you want to progressively cut the high frequencies, wouldn't it be simpler to use a LPF filter ? Tom Excerpts from Wolfgang Gil's message of jeu. févr. 17 08:02:54 +0100 2011:
Hey Tom, thanks for answering.
Yeah, i think it would be easier to use a LPF filter.
Anyway, i'll be trying stuff. Later i might release the code to the list.
On Thu, Feb 17, 2011 at 3:33 AM, Tomtom
-- Wolfgang Gil http://www.wolfganggil.com
participants (4)
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Daniel Trueman -
girodt -
Tomtom
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Wolfgang Gil