From the Cycling'74 website:
"Free your rhythms with the simple yet powerful what~ object. Give it a list of floating-point values between 0. and 1. to get impulse signals out when the incoming ramp passes through those values."
Sounds like something you could do with Capytalk tripWires:. For documentation, open the Capytalk Reference from the Help menu (or Ctrl+H) and search for trip.