OK, fair enough. Why isn't it present even as a slight bump in the Helix plot, then?
I'm not asserting any facts - I'm questioning his findings, and all he's done thus far is fire off a condescending comment (having been through his history on here, that's something he definitely has a long history of when questioned). I also can admit where I've got a gap in my knowledge (see directly above), because that's the whole point of what I'm trying to get to here.
TrueRTA is generating the signal in every case, digitally. Putting it through a couple more conversions between the digital and analogue domains shouldn't make any difference unless the two signals were sampled at different rates or there was wander in one of the clocks. Let's not forget, aliasing is where you can take two signals and - after processing - no longer distinguish them. That processing could be by the sampling in the converters, or it could be the modelling itself; I may have misunderstood, but there appears to be no reference to the converters in Cliff's OP and lots of references to the modelling and modellers (and "high gain", which suggests we're not just talking about converter performance here).
Personally, if my hypothesis is correct, I'd have thought you guys would be all over it. It'd certainly be a useful distinguishing point for purchasers - Fractal gear discards noisy bits of the original amp's signal, so you get a purer tone. Helix (or others) keep it for authenticity, but the trade off is the same annoyance you have to deal with.
If it was a real quote and not a vague recollection, I'd have provided a link and an attribution. I thought the colloquial context of the paragraph made it pretty obvious, but I'll be more explicit to avoid confusing people if you want.
