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Old 2 weeks ago
  #5
Lives for gear
 
grannis's Avatar
Quote:
Originally Posted by tINY View Post
I'm starting a new one that will hopefully be more technical and reasoned. I hate posting useful information in a thread that gets buried by Trollery.

For a lot of guitar sounds in recordings (or live on stage) the non-linearities of a guitar speaker are essential to the final sound. And, because impulse response modeling is a linear process, it can't capture the dynamics of an actual guitar speaker. In fact, everything about most electric guitar timbre is dependent on non-linear, low-fidelity phenomena.
an admirable aim that appears to be going sideways already. Maybe it's worth elaborating scientifically on what you mean by non-linear?

In strict mathematical terms, no, IRs are not linear - but then not much is - only straight lines!

I'm pretty sure you don't mean that, but I'm not sure exactly what you do mean.

btw, computerised models (and I don't mean IRs specifically, which are relatively simple beasts in the modelling world) have no problem with non-linear modelling per-se, so again, if you can define what you mean better, we may get somewhere.

fwiw, whilst I do use a Helix and IRs, I always supplement it with a tube preamp which adds some - er non-linearity(*) that disguises the digital nature of the distortion.

What I mean by that, is that I hear digital distortion as too uniform - it's like it's been quantized at a very short tempo. The tube breaks up the pattern enough to my ears to sound a whole heap better.

Clearly I am not talking about speakers, so my analogy is not perfect to what you are trying to discuss, but I thought it might illustrate my point about needing to be more precise with the term non-linear.