Hola…. para conseguir eso, hazte con un filtro que tenga seguidor de envolvente, sube la cantidad de modulación, y automatiza el movimiento de la frecuencia de corte para que siga tu idea de «comienzo en graves y término en agudos»…
Una lista de plugs de filtros con envolvente:
![](http://www.grupvega.net/tugrul/plugins/2rulefilter_Big_2_00.bmp)
![](http://www.admiralquality.com/images/?NaiveLPF_405x110.jpg)
![](http://www.admiralquality.com/images/?SCAMP_w_610x135.jpg)
![](http://www.cableguys.de/img/filtershaper_screenshot.png)
![](http://mokafix.chez-alice.fr/vst/Mutine.jpg)
![](http://www.d-dev.com/products/ZaFi2_160.gif)
![](http://www.expdigital.co.uk/downloads/press/gflux_screengrab.jpg)
![](http://www.fabfilter.com/images/screenshot_volcano_full.jpg)
![](http://www.kjaerhusaudio.com/images/classic-auto-filter_fullsize.jpg)
![](http://www.samplitude.com/de/vst/grafix/filtox_gross.jpg)
![](http://dsp.trilete.net/images/Anticode_Screenshot_v0p97.png)
![](http://www.waldorfmusic.de/assets/images/products/d-pole/d-pole_fullsize.jpg)
![](http://www.phasic.co.uk/Software/PHEnvFilterVST/PHEnvFilterVST.jpg)
![](http://www.soundtoys.com/products/FilterFreak/images/FilterFreakScreenShot.gif)
![](http://www.sonomawireworks.com/images/attaq.jpg)
![](http://www.tone2.com/assets/images/FilterBank3.jpg)
![](http://static.kvraudio.com/i/b/funkfx.jpg)