[Thomas Strathmann]
BTW, for those who can read some German, this book
https://hps.hs-regensburg.de/~elektrogitarre/
might be a fascinating read. It's a scholarly treatise on the physics of
e-guitars.
Nice! There's a truly dire need for the scientific approach to the
physics of the electric
On 11/29/13 11:54 AM, Nigel Redmon wrote:
Not to Robert so much, but for anyone who hasn't thought too deeply about
guitar amps, maybe it's helpful to look at what you're up against.
It's the extremely wide useful range of the distortion that fundamental to the
issue.
yes, and there's no
On Nov 30, 2013, at 11:28 AM, robert bristow-johnson
r...@audioimagination.com wrote:
On 11/29/13 11:54 AM, Nigel Redmon wrote:
Not to Robert so much, but for anyone who hasn't thought too deeply about
guitar amps, maybe it's helpful to look at what you're up against.
It's the extremely
A short few notes for those interested. AD converters have self-noise,
which in most cases will not even be lower than the equivalent of 16
bits, except for some pro cases and in case there are tricks being used
(which influence the bit accuracy). Say you have a 24 bits converter,
seldom will
On 29.11.13 09:35, Tim Goetze wrote:
Harmonics in electric guitar signals tend to roll off quite fast
though. There's usually not much high-frequency spectral content to
worry about, relaxing this requirement greatly in practice.
BTW, for those who can read some German, this book
Hi Stephan,
I don't disagree with Robert's formula at all. I'm simply saying it doesn't
apply. In a real implementation, you clip the signal as soon as you get outside
of the portion of the polynomial curve you're using. And that happens very
quickly. (Sure, you could say that you'll use a
well, i dunno how many real-world implementation[s] use the integral
of (1-x^2)^N or (1-x^N)^2 (the former was my proposal and the latter is
Stephan's idea). Nigel says it doesn't apply because his premise is
that he'll be clipping the polynomial anyway, so i presume the case for
doesn't
Not to Robert so much, but for anyone who hasn't thought too deeply about
guitar amps, maybe it's helpful to look at what you're up against.
It's the extremely wide useful range of the distortion that fundamental to the
issue. You want things to warm up a little with some mild overdrive. For a
Hi I have a couple of questions... Let's start with the latter:
(1) How does a guitar amp distortion effect deal with aliasing. If you use
a transfer function like tanh, you get lots of high frequencies well beyond
nyquist. How do commercial products like:
1) Sure, oversampling. You need frequency headroom.
2) There isn't a specific minimum requirement, so this isn't really an issue.
That is, the more cpu you have, the more and better you can oversample, but you
do what you need and what you can get away with. (You could go nuts and think
that,
Thanks Nigel, Thanks Thomas,
I glanced at David Yeh's introductory chapter in his dissertation and it's
full of great information. Anyone else who stumbles upon this thread should
also read that chapter. Link:
https://ccrma.stanford.edu/~dtyeh/papers/DavidYehThesissinglesided.pdf
On Thu, Nov
On 11/28/13 1:16 PM, Nigel Redmon wrote:
It's really a pretty easy call in the end—one made by ear. Basically, you see
how noticeable aliasing is on things like guitar note bends. Really quickly,
you'll figure out that 4x doesn't get the job done, and 8x is does it pretty
well at a reasonable
Robert…If you're talking about distortion, of significance, you're *always*
talking about clipping that polynomial. Your (N+1)/2 times oversampling goes
out the window, and you simply need as much oversampling as will get the job
done. Don't forget that although the outlook get more grim as you
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