Why can't one automate MuDrum?

[soundmodel]

Why can't the parameters of MuDrum be automated?

[MuTools]

They can! Why do you think they cannot?

[soundmodel]

I couldn't find a way how to do it. E.g. automate 'XPS' of the first sampler.

[MuTools]

Basically it's dragging the parameter name to the [+] track button.
Then you can create envelope parts on that track and draw automation in it.

Also see:

[soundmodel]

That's smart!