Electro Harmonix analog delay simulation

First of all, I must say I don't know anything specific about that particular analog delay. This summer, I'm going to be working on developing some Max externals/VSTs to model analog ring modulators and analog filters I'm not done with my research yet, but have some general advice for you.

The easiest method is to figure out a process that acheives a similiar effect as the analog circuit. Using analog ring modulation as an example, clipping the carrier at the momentary amplitude of the modulator roughly simulates the behavior of the analog circuit. If you can do some research into what the analog "sound" is, it is usually easier and more efficient to simulate this vs modeling the specific circuit.

The more complicated method would be to look at your schematic and ind out the formulae that model specific components in the circuit and then create an implementation that connects those formulae according to the schematic. This would more likely be easier (learning the SDK asside) and more effecient to implment in an external. While I still have more work to do to figure out how to correcty implement the analog ring modulation model I'm workign on, I do know that I wouldn't want to deal with that using MSP objects.