[PD] overdriven speaker
matju at artengine.ca
Sun Nov 14 18:16:39 CET 2010
On Wed, 10 Nov 2010, - wrote:
> By the way it is kind of sad that everyone (including me) always uses
> tanh, while there are much much more functions out there which could be
> better suited, produce less high harmonics (aliasing!) or just sound
> better. A while ago I took a small dive into this topic but only
> remember some sigmoid functions, but not what their effect was: atan,
1/(1+exp) is the same as tanh, except for the input gain, output gain, and
That's the same as x/abs(x), which is the limit of tanh as input gain goes
towards infinity. It's the same as [>~] except when the input is exactly
zero, and except for the output gain and output dc.
What's this ?
> erf() [I couldn't test because its only in the documentation of expr but
> not useable] But this should be a topic of its own.
Sorry, but [expr erf($f1)] does work. There are functions in [expr]'s docs
that don't really exist in expr, but erf is not one of them.
| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
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