[sdiy] ring ? balance? 4 quadrant ?

[NATE!]

here you go :)
http://www.hoohahrecords.com/resfreq/articles/multiplier.html
thank dave magnuson for that one.

they're sort of the "same" thing, same basic idea, but each to a different
extent.

- nate

----- Original Message -----
What is the difference ? a balanced modulator, a ring modulator and a
4-quadrant multiplier ? are they each different circuits that do the same
math trick ? i understand that sometimes a VCA can do ring modulation and
sometimes a ring modulator can be a VCA.... what gives ?
-Dustin