It's harpsichord music that can be found in gilneas (worgen) theme from World of Warcraft game. It's by ear of course. Piano is Roland HP503. Watch in HD for perfect audio.
Indeed, it is built in effect. You can find it in this perticular piano (HP503) under "Early" piano sounds, number 5. There are few more harpsicord sounds, including double octave harpsichord.
