I have heard it said that it is near impossible to get JABB3 to sound smooth like a real Big Band. I have experienced this frustration but found it was basically a lack of knowledge about how MIDI works with these very nuanced instruments. Given that many of the Jazz performances were nuanced, it only makes sense to me that my MIDI files should contain many nuances as well. So, is the first page from Moonlight Serenade.
I hope this will convince some that more than decent results are possible. I included a SONAR X2 project, MIDI file, ARIAX ensemble settings, and an MP3. The MIDI should help people understand how to use attacks and manipulate the CCs to get the nice sounds.