Aliasing

  • Thread starter Thread starter Deleted member 472
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No guitar, but...

iu
 
Any frequency that would've originally been above Nyquist, but wraps back around because of a lack of anti-aliasing filtering and oversampling techniques.
This ^^^ In all seriousness, even though my Mary Had a Little Lamb example was silly, it has VERY audible aliasing on the highest "little lamb." It's so prevalent that it's hard to distinguish the original pitch that provided the input. I did game it a little bit though, because I intentionally chose that highest pitch as one that had the worst aliasing ;)

With guitar, where you don't have pure sine tones, you still get these aliasing overtones on certain pitches due to their harmonics -- but they're underneath everything else so they become hard or impossible to distinguish on their own. It manifests more as a lack of clarity, or a weird "hashiness" behind the sound that you can sorta hear but you wonder if you're taking crazy pills.

It's worst with high-gain tones, but fortunately those have the advantage of also making it the hardest to hear background noise. So anyway, it's there, but you'd likely only be able to perceive it as one modeler or plugin sounding crisper/clearer than others, or having better frequency separation with high gain tones instead of upper harmonics kinda smearing together. This clarity is something I've always heard in Fractal's high gain tones when compared to others, FWIW.
 
Look to to higher gain tracks before Line 6 increased the oversampling compared to after with the HX platform for examples.
So I checked out a video Jason Sadites did comparing 3.0 to 3.1 (oversampling update). The difference is definitely audible in his raw guitar tracks. I’m just not yet convinced that someone could hear the difference in a mix.
 
So I checked out a video Jason Sadites did comparing 3.0 to 3.1 (oversampling update). The difference is definitely audible in his raw guitar tracks. I’m just not yet convinced that someone could hear the difference in a mix.
In most cases the underlying music is going to be more important than the nuances. There’s some extremely good guitar work that’s been done with previous generation modelers. Though that’s not to say there isn’t a benefit to better oversampling now and into the future.
 
Post a finished track or song where aliasing from a guitar through a digital modeler is audible.

Um, if your song/track has audible digital aliasing, maybe it's not finished? :LOL:

Can't recall any songs with audible aliasing off the top of my head, but it is relatively easy to get digital plugins with low oversampling to alias on mildly high notes. See f.ex:



This guy has a couple of examples of aliasing on vocal mixes without oversampling by the end of the video. The effect is very subtle, mind you, but it is audible.

 
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