Here’s an odd one. If I add an instance of VB3fx, and route an instrument plugin through it, it all runs as expected, with VB3fx applying rotary effects etc. If I then save the song, reload Cantabile, and reload the song, the instance of VB3fx no longer has audio input ports, and I no longer hear any sound through. I need to use “Replace plugin” with another instance of VB3fx to restore its audio input ports.
Bug?
Neil
Neil, there’s a thread here that may help you out…
Aha!!! Thanks David! 
May I interrupt and say : VB3! ?
Sounds exactly like the problem I had in the other thread, Neil. Did the steps I took solve it for you?
Yes, thanks Danny, the exact same steps solved it for me too 
Interesting, because it makes it more likely that the cause is a(nother) bug in VB3 rather than a one-off.
I guess it’s a measure of the plugin’s quality that we put up with it despite the issues…