Variation to Variation can be accomplished with or without a fill by using a dedicated "Auto fill-in on/off" panel switch...on the S950 it is to the immediate right of the OTS Link button.

You can also individually by-pass a fill by pressing the Variation button you want to go to twice quickly...very clever, and very useful.

Sustain characteristics for string voices vary...some (SA, Live!, Sweet!) are meant to decay slowly (fade) when held with a sustain pedal (infinite sustain with key held down), and others, mainly in the SA2 and GM/XG sections, have infinite hold when using a pedal. This also applies to various organ, brass, pads, synths and wind tones. Quite frankly, it is nice to have the choice.

Preset SA/Cool! organ sounds are usually programmed with slow rotary, (some also have very realistic Hammond style Chorus Vibrato) which can be changed to fast rotary by using the mod wheel. The drawbar samples (Organ Flutes section), however are recorded sans rotary and you can choose from several Leslie types as well as Normal and Vintage tone wheel simulation. Ramp speed is adjustable. Leslie types include those that used guitar amps (usually Marshall or Hiwatt) in place of the stock amplifier.

Other brand arrangers offer a similar setup.

It is hardly unusual to see OS updates to fix minor bugs and glitches...very few new instruments from the major arranger manufacturers (Korg and Yamaha)manage to get by without one or more OS upgrades...thankfully they are usually prompt in making them available.

Ian