EOengineer
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I’ve peer reviewed this finding and concur.We’re not writing scientific papers we’re shooting the shit.

I’ve peer reviewed this finding and concur.We’re not writing scientific papers we’re shooting the shit.
If they see this thread maybe they'll also remove "ultra-precise reproduction of high-frequency content"In related news, IK appears to finally have removed the false marketing claim of "... no aliasing whatsoever" (see the second bullet point on the right in the screenshots below):
March 2025:
View attachment 40631
November 2024:
View attachment 40632
You can compare to other amp models and captures within the ToneX and Amplitube eco-system to derive a pattern. So far, I'm not able to see one. Which weakens the opening conclusion.I think without a comparison with the reference gear you can't really tell if the high-frequencies are attenuated or not... And as said it seems to vary based on the capture.
Personally in the few captures I've made till now I definitely see a pattern, there's always a steep roll-off around 14-15 kHz plus an attenuation of 2-4 dB starting around 2-4 kHz. The latter seem to be kinda variable though, sometimes it's there, other times is slightly less.You can compare to other amp models and captures within the ToneX and Amplitube eco-system to derive a pattern. So far, I'm not able to see one. Which weakens the opening conclusion.
Furthermore, the harmonic analysis sweeps show a much more detailed picture across the dynamic and frequency ranges, and there is no sign of a fixed lowpass filter causing a fixed frequency roll-off.
So the claim that there is a 5k roll off in order to tackle anti-aliasing, I think we can safely put that to bed.
Ultimately, I cannot reproduce what Ben has reported here.
Your OP still says: It kicks in at around 5kHz* - Yes I was wrong about the ~5k LPF cut, and amended the Thread Title and OP accordingly yesterday
Uhem…maybe re-read my post, you need the fundamental since it’s creates the partials. And the distortion adds partials according to it. Hence me saying the 13th and likely being completely unaudible would be at 16k.Using the fundamental of the highest note on any guitar is not really relevant. The fundamental gives you no information about the harmonic structure of the pedals and amplifier distortion that come after the guitar.
I do not agree that inharmonicity (whether it actually is that, or not) is the same as aliasing. Aliasing necessarily involves wrap around frequencies, that ultimately ends up affecting and being perceived within the lower frequency range of the final tone.
Gotcha.Uhem…maybe re-read my post, you need the fundamental since it’s creates the partials. And the distortion adds partials according to it. Hence me saying the 13th and like completely not audible would be at 16k.
Your OP still says: It kicks in at around 5kHz
Which is why I brought it up.