vimsynth/modules/scope
Shows a waveform. Passes its input through unchanged, so it can be inserted anywhere without a mixer.

SCOPE to get this card.Down the left edge of the card, top to bottom.
Down the right edge, in the same order.
The full reference — every parameter curve, the patching notes and the worked examples — lives in the manual: docs.vimsynth.com/modules/scope. In the app itself, :help SCOPE opens the same page without leaving the rack.