These are the KS Master patches for East West Quantum Leap Symphonic Orchestra- still a very popular library, especially for students! Because this library's keyswitches are often split into 2 separate ranges, it's best to use Piano keyswitch layout mode.
The keyswitches are labelled exactly as they come out of the box. however this library can benefit greatly from better labeling and some keyswitch re-organization. It would take quite some work but would be very helpful.