True Stereo IR's from a reverb unit..

You are right, it takes two passes, a stereo recording of the sweep into the left input and out of the 2 outputs, and then again for the right. It is essentially a 4-track recording. This is the correct way to do it.

By the way, I've done quite a bit of Lexicon units, and it is very important that you turn off the ubiquitous chorusing that is in most Lex verbs. Chorus ruins the sweep. Best to turn it off, and then use the Modulation delay in Logic to recreate the chorusing.

John Buehler wrote:
You are right, it takes two passes, a stereo recording of the sweep into the left input and out of the 2 outputs, and then again for the right. It is essentially a 4-track recording. This is the correct way to do it.

I would also take an impulse response of Mono in Stereo out as the Lexicon internal stereo simulation can often be quite dramatic when used with voice, brass or woodwinds.

Oops. nevermind, of course you will have that, and more.


pancenter-

Message was edited by: Pancenter

I've never had trouble turning off the chorus on any Lexicon, but I haven't done a 96 yet. I can't imagine it's difficult. The chorus is always post reverb when I do it, meaning the chorus is applied to the output of Space Designer, not the input. The chorus is very subtle, like 1-2%, and it gives it a little more depth and variation to the reverb, and to my ear it makes the reverb sound much more like a Lexicon. But you can easily over-do it, and there a lots of chorus effects that sound like garbage to me. The chorus in a Lex verb is very pure and clean. I have also simulated the early-reflection type multi-tap delay signal that exists so prevalently in the input of the PCM-70, 80 and 90, and with enough effort you can get quite close. It's just a lot of work.

It seems likely that a reverb like random hall could not be done using the true stereo method because it requires 2 passes, and because it's random, left and right aren't working together. I would try a regular stereo capture instead.