The result seems to me to be more like Reverb in my perception/use. Where the lower it is (like R= 0.5), the more restricted the space is so it bounces around more/intimate and the higher values are more like the room is expanding so its not as bouncy.
What does R refer to or what is it a spectrum from->to? What does the absence and abundance of resonance reify as observably?
Wah-wah pedals are resonant filters with an adjustable cut off. Rock and metal guitarists have been using them in solos to create that expressive “crying guitar” sound. Classic example is the solo in Sweet Child O’Mine by Guns N’ Roses.