Tanh and Saturator

Question

Sorry if that question has already been answered, but is there a tanh function or prototype?

Or could the Saturator prototype be used to approximate an hyperbolic tangent function? I tried, but don't really know which sigmoid function the saturator is based on.

Thank you!

Answer 1

Hi,

What do you need tanh for?

The saturator does have an S curve. You can see what a Sound like Saturator does by putting a full ramp through it and plotting it on an oscilloscope:

The blue line is the Saturator.

 

Here's the Sound.

There is an ArcTan Sound in the Maths category that also has an S-curve, although it's a different function from tanh.

 

 

Comments

hi Alan,
This is mostly to add a saturation stage in a feedback path. Arctan seems pretty suited, I guess I can simply divide the result by 0.5pi to have it in a good range.
Thank you!

---

Have a look at the InputOutputCharacterstic Sound. You might find that useful too.

---

The saturator does have a tanh like shape but it's even better because you can change the shape and adapt it to your needs - I'd go with that

---

Thank you! Yes, the saturator is great, trying to figure out now the difference between the curve parameter and the order value.
The waveshaper looks pretty fine too actually, with a atan.
Thanks a lot for the answers, put me on the right path.