Some days ago I created a new version of Freeverb~ as a deken package. Apart from fixing a minor bug, I added the option to route the first delayed signal through the filter section. The default was to filter only the second and later delayed signals.
This changes the character of the signal, specially for high 'wet' settings. Naively one would expect all delayed (=reflected) signals to be filtered, but Freeverb~ isn't routed this way.
I am interested on opinions on this. It is available as freeverb~ v1.2.2 deken package for the usual platforms. Send the [firstpassfilter 1( message to enable the alternate routing.