Simply a spring reverb.
Physical modeling, non linear behaviour, multi-mode modulation.
Several springs, several combinations (parallel, series).
Round, nice reverb or “twisted” effects.
Tap on the springs to hear the impulse response and tune the reverb.
Available as Win32/64 VST, Mac32/64 VST/AU.
Now also available as AAX-native 32/64.
Guitar demo 1
Guitar demo 2