It depends on the type of organ/string sounds that determines how sustain works...on some it is a "hold" and on others it decays away, much like a piano. I found the decay type useful as a fade out at the last note.
I have sent to your home email, some T4 styles I made (on the T4) with the organ speed switch (and my own Freeplay style), so I'll be interested to hear if they work okay (the OTS may be different or not work)...I may not get an S950 for some time, due to it's popularity and back-orders etc..
I thought the jazz beats were awesome too.
Ian
_________________________
Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.