There are different ways of implementing a VCA. Eliott Sound Products has a good guide on the various techniques to achieve a VCA called [VCA Techniques Investigated](http://sound.whsites.net/articles/vca-techniques.html).
There are different ways of implementing a VCA. Eliott Sound Products has a good guide on the various techniques to achieve a VCA called [VCA Techniques Investigated](https://sound-au.com/articles/vca-techniques.html).
A small overview over the pros and cons of the different technologies:
