This is really two questions.
First: I want to do a snare drum roll, slow crescendo over three bars. I've done a search through JABB and can't find a snare roll anywhere. I tried writing lots of separate snare hits and it doesn't sound good without the cresc, awful with it. Luckily I have GPO also, so for the time being I've stolen a snare roll from there. But that's a kludge. Is there a roll hidden somewhere in JABB that I haven't found?
Second: I also have a trumpet note held over a bar and a half which I want to do a slow OOOWAAAH on. I've tried the plunger mute trumpet, with cc16 ramping slowly from 0 to 127, but I don't get the effect I expected. It's more like a cresc than a slowly opening plunger. Then I tried doing a cross-fade between an open trumpet and one with a mute (bucket or cup) and this didn't work too well either. So ... how do you get those good ol' Ellington "jungle" sounds?