This is just a comparison of amp models. No speakers or mics involved. It's a measure of how accurate the frequency response of the amp model alone is. Captures/profiles will likely be more accurate same as a Tone Match will be more accurate.
In fairness the accuracy above 10 kHz isn't terribly important as the cab filters out most of that anyways. The critical band is 50 Hz - 10 kHz.
Not my experience with the PS-100 at all. I find it has a very marginal effect if I run my real tube amps through it vs running direct to a cab at the same volume. The line out to me sounds no different from my Bluetone Loadbox which like the PS-100 has a very marginal effect on the behavior of the real amp. When used with a modeler to the PS-100 line in I find that turning off the speaker impedance modeling on the FM3 helps it behave more like tube amps do when hooked up to it. Otherwise you can get weird low end response or overhyped lows and highs. I use a somewhat uncommon 4x10 cab so this might be less noticeable on a 4x12 that is used by most amp models as the speaker impedance curve.
I need that as a bumper sticker!
The continued mentioning of "sweep frequency" still has me mildly confused. I thought you were hitting it with a fixed-frequency impulse and then watching what happened through the full range of 20-20k. It appears the stimulus frequency has dropped lower, to allow more harmonics to reveal themselves. Perhaps you are hitting it with a narrow-ish sweep rather than single-frequency imuplse and that's my only point of confusion?
It's used quite a bit on these forums as well. Just do a search for the term. I have no idea what it means but others sure use the term a lot.
It's a narrow band sweep, i.e. 6-8 kHz. If you use just a single frequency the aliasing products can be higher or lower so by sweeping over a small range you excite all the possible aliasing products.
There are multiple ways to model an amp. The Fractal way involves modeling the individual components in the circuit.
Is this the result of a sweep or a single frequency? If a sweep, you don't mean 20-20k but something narrower?
Reread the first paragraph of post 152.
Higher oversampling is the most common approach. There is a technique known as anti-derivative anti-aliasing. The problem with that is it really only works with waveshaper approaches. You use the anti-derivative of your waveshaper function and then take the derivative of the result.
d/dx of the integral of f(t)dt from 0 to t (that's hard to type out) is just f(x) isn't it? What's the benefit of doing it that way over just using f(x), does it sort of "normalize" the data?
