vimsynth/modules/att
Attenuverter: out = in × amount + offset. THE most important utility in the rack. Negative amount INVERTS. With nothing patched in, offset alone makes it a constant CV source. Any time you want 'modulate X by Y at depth Z', or 'invert this', the answer is an ATT.

ATT to get this card.Down the left edge of the card, top to bottom.
offset says.Down the right edge, in the same order.
in × amount + offset. With in unpatched this is a constant, which is how you make a DC source.Left to right across the face — the dials in the picture.
in unpatched, this alone is a constant CV.The full reference — every parameter curve, the patching notes and the worked examples — lives in the manual: docs.vimsynth.com/modules/att. In the app itself, :help ATT opens the same page without leaving the rack.