Optimized Lambert W function

General JUCE discussion
1

Why is it not available an optimized version of the Lambert W function (or Wright Omega function)?

I suppose that an efficient and accurate approximation has been proposed in one of the last DAFx conference, it would be nice to see it available in the dsp module

2

Hello! (That’s how we start a message in a new topic, even more when it is about a new feature request :grinning: )

Could you tell me what DAFX article you are talking about? And have you tried to implement yourself what is suggested here?

By the way, can I know why you need this function? I don’t know a lot of applications for this, which is one of the reasons you can’t find it in JUCE yet.

2 Likes
3

Hi @IvanC and nice to meet you! :smiley:
Sorry for my brutal start, really bad behavior. My fault!

Ok so, the article from DAFx is here:

It is very useful in the Virtual Analog context, to solve transcendental equation (such as BJT or Diode characteristics) :slight_smile:
Here you can find an example of mine:

But i suppose that in the article there is link to a better code!
Let me know what you think and thank you very much! :slight_smile:

1 Like
4

Hello again!

So I don’t understand your statements, here is the code linked by the DAFX 19 article:

http://dangelo.audio/dafx2019-omega.html
http://www.dangelo.audio/code/omega.h

Looks like your code is based on the DAFX19 article implementation already, isn’t it?

1 Like
5

Hi!

Yes, it is! I think I implemented only two approximations of the four provided by the author