This is an improvisation on Zynaddsub-FX. Later it came out Vangelis has a soundtrack piece called "Missing" which is similar. Oh well, great minds... And all that His is a full piece with strings though, not a meditational motif.
Sampled electric clean guitar processed in Reason 3. Another couple guitar instruments with a similar Reason 3 stack play in Game06.mid. The other instrument is Microtrance.