"Here’s a spin off product from Fletchy-Muncher,
with Fletchy-Muncher we used knowledge of the
Fletcher-Munson effect to spot harshness. What we
did with Smile was to invert the curve and by that
create a plugin to get rid of harshness. To make it
more musical we added a transient recovery that keep
the most prominent transients around 3.5KHz and a
tube emulated distortion around 400Hz, just to warm
things up a bit. We also included a LP and HP filter
to filter out the very low and high-end that,
depending on the material, can get out of control.
In the donation version you also have mid/side
processing which is essential when trying to sweeten
a mix in a transparent manner. So in short, Smile is
a Fletcher-Munson based de-harsher."
It's free but if you donate you get a version with