No virtuoso playing, just browsing through 8 of the 31 instruments included in the Julie Resynth expansion soundset for Sonosaurus Thumbjam app.

This set is based on one-shot samples of the voice of Julie, a Montreal jazz singer. But here the samples are resynthesized to create new ones that are playable chromatically across the keyboard.

It costs $2 US, visit this page for more info: http://lesproductionszvon.com/for_iOS.htm