I've just discovered ring modulators being used as an effect rather than being used as a synthesis technique, and I was wondering if there were any plugins which do the following? 1. A ring modulator with custom modulator input: you know how you can get vocoders which can take two sounds and use one as modulator and one as carrier? Can I get a ring modulator that does that? Does it exist? Also one which uses MIDI to control the mod pitch would be nice too. 2. Frequency or phase modulators which can be used as an effect, so I can put FM on later in the processing chain. I know that this is a bit of an obscure request... is there some reason that plugins like this aren't common?