A lot depends on how good a player you are...
Most arranger demos, unless specifically labeled as 'style demos' tend to be SMF's derived from the style output, overdubbed with REALLY good solo playing, then tweaked in the sequencer until perfect.
The thing is, how good the playing is determines how much tweaking it needs until perfect
![](http://www.synthzone.com/ubbs/biggrin.gif)
If you are a great player, you are going to get quite close (depending on whether the part CAN be played with just one hand), if you aren't, well, YMMV...
The thing is, anything they did to improve the sound, you can too. If you are asking whether, OOTB it sounds like that, I guess that depends on whether you can PLAY like that. Until you can, it's all kind of academic, isn't it?
If you want to hear how bad it CAN sound, try Youtube... plenty of examples of that! But there are also demos (haven't really looked for the good Korg ones) for Yamaha by Vocken and Bartman that show that, if you are a great player, you can make great music live.
Korg provide by far the best sound editing tools of any arranger, so if you want to tweak the new sounds, or create some yourself, including DNC voices, you can do it. Whether they edited the tones for the demo, who knows? But if they did, so can you...
But it's one thing to have a great sound. It's another altogether to play a great solo...