Found on KVR, saying
"The Sound of Piano One comes from the Yamaha C7 concert grand, a true workhorse in the professional piano world, appearing on famous concert stages, in international competitions and in prestigious music events throughout the world."

Impressive for a 160MB download, here is detailed introduction and downloading from KVR
http://www.kvraudio.com/product/pian...by-sound-magic
Although it is a freeware, it has many presets you can play with, very interesting, downloading link is here
http://www.kvraudio.com/product/piano-one-by-sound-magic/downloads