[PD] Vanilla replacement for tanh~

[Pagano, Patrick]

Is there something similar in Vanilla for a [lp8_cheb~ 20000 100]
When I copy the iemlib abs into my extra and dive into the objects it eventually fails because it cannot create filter~


Sent from my iPhone

> On Jul 3, 2015, at 1:27 AM, Miller Puckette <msp at ucsd.edu> wrote:
> 
> I've never seen that approximation before but there must be some
> restriction on the allowable values of X since the expression diverges
> for large positive or negative values of x, while tanh(x) converges to
> +1 nad -1, respectively.
> 
> cheers
> Miller
>> On Fri, Jul 03, 2015 at 01:23:29PM +0900, i go bananas wrote:
>> there's a good approximation for tanh that can be made using just a couple
>> of simple arithmetic objects:
>> 
>> formula is:  tanh(x) ~= x*(27+x*x) / (27+9*x*x)
>> 
>> it's close enough for every application i've ever come across, it's cheap
>> cos it only uses simple arithmetic, and it doesn't degrade the resolution
>> of your signal like a table lookup does.
>> 
>> 
>> 
>>> On Fri, Jul 3, 2015 at 12:56 PM, Chris McCormick <chris at mccormick.cx> wrote:
>>> 
>>>> On 03/07/15 03:06, Pagano, Patrick wrote:
>>>> Is there a way i can replace something for tanh~
>>>> and inits in Vanilla 46?
>>> 
>>> Using a pre-computed table for speed:
>>> 
>>> https://github.com/chr15m/blockhead/blob/master/e_tanh.pd
>>> https://github.com/chr15m/blockhead/blob/master/e_tanh-help.pd
>>> 
>>> Or install "blockhead" using deken. :)
>>> 
>>> Cheers,
>>> 
>>> Chris.
>>> 
>>> --
>>> http://mccormick.cx/
>>> 
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