Try tanh function mapped to the range of about -5 +5 and a small signal input. http://mathworld.wolfram.com/HyperbolicTangent.html
Here's a nice approximation with five multiplies http://www.musicdsp.org/archive.php?classid=5#238
what's the best and most cpu efficient way to clip a signal in an analogue fashion, rather than getting nasty digital distortion?
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On 08/05/2007, at 13.11, padawan12@obiwannabe.co.uk wrote:
Here's a nice approximation with five multiplies http://www.musicdsp.org/archive.php?classid=5#238
Indeed. I had to see it. For anyone interested: http://puredata.info/ Members/stffn/tanh-aprox.png/
Hallo, padawan12@obiwannabe.co.uk hat gesagt: // padawan12@obiwannabe.co.uk wrote:
Try tanh function mapped to the range of about -5 +5 and a small signal input. http://mathworld.wolfram.com/HyperbolicTangent.html
Here's a nice approximation with five multiplies http://www.musicdsp.org/archive.php?classid=5#238
That's a nice version! Attached is a comparision of both in Pd, looks (and sounds) good.
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
Hallo, Frank Barknecht hat gesagt: // Frank Barknecht wrote:
Here's a nice approximation with five multiplies http://www.musicdsp.org/archive.php?classid=5#238
That's a nice version! Attached is a comparision of both in Pd, looks (and sounds) good.
Oh, and even it uses only four multiplies - or rather three and one division. ;)
But then the Pd version also calculates the clipped valuesi outside (-3,3), which are always -1 or 1 anyways, so that eats up the savings again.
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
quick tanh looks good. i put in a dollar and my cpu gave me 96 cents change!
Hallo!
quick tanh looks good. i put in a dollar and my cpu gave me 96 cents change!
I did not follow the whole thread, so maybe this was already said.
But I would also do the tanh interpolation with a wavetable. You can simply once use this function to generate the wavetable and then use it and it will be very fast (and you can use any function you want)
- so you can also draw a little bit around, which might be interesting
too ...
LG Georg
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Frank Barknecht -
Georg Holzmann -
hard off -
padawan12＠obiwannabe.co.uk -
Steffen