but create/make the delay TIME range respond to some modifier that is moving randomly (not constant ratio), such as pitch or envelope. So, you might want to set a 100% delay on one side (pan each side HARD L/R) and then have the delay time 'ranges' from something like 1ms to 24ms minimum to maximum (please do y 1 to 10, 10 to 30, 5 to 20ms see what you like best tonally, there is some comb filtering in some cases). You need modulation - but you need it to be truly random within parameters that don't make things go stupid out of tune. don't vary enough 'randomly' to make it seem realistic using the usual sine waves or set times, etc.

The problem most of us have in AXE FXII - in trying to 'double' an original part a second time for the ADT effect, the second track cannot be a constant proportion to original signal (that is TOO perfect). The very best realistic ADT I have found is the WAVES plug-in 'Abbey Road Reel ADT.' It's terrific/sounds like the real thing, because it is modeled on the real one at Abbey Road.

Reel adt live