An "orchestral version" refers to a musical piece originally composed for instruments other than those typically found in an orchestra, but that has been rearranged and adapted to be performed by a full orchestra. Full definition
Opening with a fantastic live orchestral version of the Zelda theme, it is clear that Nintendo is going to open with their... (gamingtrend.com)
While this is a bit of a disappointment, as this is my favorite portion of the piece, it's still awesome to have a live orchestral version of Chrono Cross music on CD. (originalsoundversion.com)
It's a synthesized orchestral version but it often sounds like a cheap MIDI project; those who loved the original can opt to listen to the original SNES version. (rotorob.com)