"How does Sonar control what your plugins do or do not "pick up"?"
The same way other hosts do. I'm no software expert but other hosts seem to be able to see when an fx has a midi in port and respond accordingly. In sonar you have to configure the effect as a synth. Jbridge is only used when a 32 bit fx is used because the built in bitbrige doesn't give me the VST options I get with 64 bit so I can't choose the "configure as Synth" option, which has to be chosen to get an effect working with midi but only sometimes do they work with midi. Same with 64 bit effects except I don't have to use Jbridge but this doesn't always work.
I am talking about fx plug ins designed to work with midi and they do, but not always in Sonar. their learn functions are not available and none of them can use act, because Sonar requires you to configure them as a synth and not as an effect, which is what they are.
every time I try another sequencer they don't have this problem, it's plug and play. I have invested a lot into Sonar over the years and have a VS controller sound card. It would be a shame to have to use something else just because things are falling behind on this front but it is definitely a Sonar issue.
i was just hoping they might have sorted it by X2 it seems like they don't have the full VST standard implementation.