Roland AIRA System-1 user GStormElectro posted this video demonstrating a nice variety of sounds from the recently released DSP synth from Roland.
With judicious use of the built-in effects and lots of poly sounds, it shows off some of the aspects of the synth nicely. In fact if you check out his series of videos X Minutes With..(where X=number of minutes with a particular instrument) you might enjoy them.
Do check out our own review of the Roland System-1 (part 1) too if you want to know more.
Prototype alert, Karplus Strong in the house