I was having a listen to some of the saxophone sounds again, and heard something that may work on a patch called Jazz Tenor RX.
I see in the sound mode one of the multisamples is a growl sound. I was trying to tweak the velocity and the output levels, with not much luck so far.
I mostly use Tenor Sax 3 DNC, the octave up effect can work without reaching for the assign switch. This is useful for me while I am playing live, as I keep a hand free to play on a second keyboard. I was hoping someone could help show me how to add this growl layer on to Tenor Sax 3 DNC.