Here is a little demo of string resonance applied to the cello model of EigenD
Music Unfolding Sympathetic strings behind a cello model by Mike Milton
The first bit is the dry cello model, the second has the effect, and the last bit is the effect minus the cello itself.
The 'strings' were tuned As shown in the scree cap below. One can also set the string frequency as notes (eg: c1) which are then converted to Hz. and, indeed this is how the setting below were derived (CGDA)
If you are having an issue with the player above, view it directly at SoundCloud