Hi !
Well, I’ve asked it in the title : is it possible to vertically invert the signal of a sample in the sampler editor ?
(like the mirroring button in the automation part or in the instrument editor)
no there’s no button to do it in one go, but what you can do is:
in an empty track, create a gainer device from Track DSPs.
see the Left and Right inverse buttons, enable both.
now in the sample editor click the 
button
Cool, nice tip! Thanks!
thanx for that 
Thanks !