Modulating ShapeFX Gain

[dannytaurus]

@Christoph-Hart Do you have any objection to me adding modulation to Shape FX Gain param?

The Drive param in Polyshape FX already has modulation. I just want it for ShapeFX too.

If you don't want a PR, I'll just do it in my fork.

Also, if it's terrible idea for some performance or complexity reason, let me know!

[Oli Ullmann]

@dannytaurus
I tried modulating it using the matrixTargetId (slider), and it produced some unpleasant crackling noises. Maybe that's why modulation isn't intended for this...

[David Healey]

@Oli-Ullmann Probably will work with smoothing.