Get display value from a device parameter to live.observer

Hello, I am trying to build a device where I can get a display value from a selected device parameter to an observer. In the attached maxpat I can only get property value. What do I mean with display value: Lets say I load up Live's compressor and I want to send the value of the attack to the observer. I want to get the value that is displayed in Live, that is 0.01ms-1s, but right now I only get values between 1 and 0.