Last year @David-san had a little fight with getting signal-magnitudes from local rack to global rackspace. The usual approach (using the parameters in the To/From blocks) didn’t work, so I suggested I could create a work-around with a plugin that converted signals to parameter values. If you like, you might call it an envelope-follower-light: no MIDI, no advanced settings. Just a refresh-rate and a smoothing factor.
In fact, it was the base for the Envelope Follower, although in the end they became very different.