Old message, hopefully ukm is around for my two cents regarding using Jamstix with Cantabile.
Jamstix creates drum parts on the fly each time you hit play in Cantabile so there is a lot going on inside the VST. Version 4’s interface has a 3D model of the drums that shows each pedal movement and sticking. I’ve found that useful for bass practice.
The CPU percentage used varies depending on what you’ve set up in the song. I try to keep the rest of the song simple when I’m using Jamstix to develop drum parts. Usually I just use VB3 or TruePianos which run fine with Jamstix.
Jamstix has a mode where it can react somewhat to what you’re playing (you feed it the output of the VST you’re playing) which is fun.
I suppose Jamstix could be used live, it’s “brain” is intended to model actual drummers, the developer, Ray Zeuner, is constantly adding new “drummers” which represents sets of actions, fills and style elements that a drummer such as “Gavin” (the latest addition) might perform. I find the default settings to be quite good for the grooves but accents and fills can be too much. You can pick the drummer and then direct it to be “restrained”. Then you can go into the panel for fills and dial it back. Ray is very helpful on the forum and another person there, a_azimuth is really responsive. There are lots of little tricks you can do to get the Jamstix “playing” to match what you have in mind, an example is you can pull elements of one player (drummer) into another.
On the Rayzoon Soundcloud page you can hear examples of what people have created.
If a run through of a song sounds good you can lock the bars you liked so they don’t change in subsequent plays of the song. You can also export the midi to a file. I have done that and then used the C3 media player to feed that midi back into Jamstix running in its midi playback mode. You can also drag midi drum parts into Jamstix and it will use that as the basis for the groove.
Jamstix has fairly good samples, I usually just use those but it comes with built in maps for the default drum kits in Superior Drummer, Addictive Drums, BFD etc.
Jamstix is a VST that requires a good amount of effort to get under control, it’s been worth it for me because the rock, blues and swing drumming it can “play” are pretty good for organ practice.